JAR 包 : doget 方法 : 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.servletexception; 4. import javax.servlet.htt

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Java Servlet 技术的实现原理程天任摘要 : Server Applet 全称 Java Servlet, 是用 Java 编写的服务器端程序其主要功能在于交互式地浏览和修改数据, 生成动态 Web 内容狭义的 Servlet 是指 Java 语言实现的一个接口, 广义的 Servlet 是指任何实现了这个 Servlet 接口的类, 一般情况下, 人们将 Servlet

1 Java Servlet 技术的实现原理程天任摘要 : Server Applet 全称 Java Servlet, 是用 Java 编写的服务器端程序其主要功能在于交互式地浏览和修改数据, 生成动态 Web 内容狭义的 Servlet 是指 Java 语言实现的一个接口, 广义的 Servlet 是指任何实现了这个 Servlet 接口的类, 一般情况下, 人们将 Servlet 理解为后者 Servlet 运行于支持 Java 的应用服务器中从原理上讲,Servlet 可以响应任何类型的请求, 但绝大多数情况下 Servlet 只用来扩展基于 HTTP 协议的 Web 服务器要介绍 Servlet 必须先把 Servlet 容器说清楚,Servlet 与 Servlet 容器的关系有点像枪和子弹的关系, 枪是为子弹而生, 而子弹又让枪有了杀伤力虽然它们是彼此依存的, 但是又相互独立发展, 这一切都是为了适应工业化生产的结果从技术角度来说是为了解耦, 通过标准化接口来相互协作本文介绍了十个跟 JAVA SERVLET 有关的实验案例, 通过编译运行得出测试结果在 tomcat 服务的基础上, 我们进一步探讨了客户端与服务器间的交互原理, 即超文本数据请求与响应模型, 达到了预期教学目标, 具有一定的启发性和学术价值前言实验工具与原料 :Myeclipse_10, jdk_1.7,tomcat_7 等实验原理 : 通过使用 springframework,jdbc-oracle,commons-fileupload 等不同的类库操作 java servlet, 联合使用 tomcat 与控制台读出结果, 实现程序的编译执行, 并初步涉及与数据库的连接与通信正文实验一 :HelloWorld 入口测试程序工程目录 : 1

JAR 包 : doget 方法 : 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.servletexception; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.http.httpservletrequest; 6.

2 JAR 包 : doget 方法 : 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.servletexception; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.http.httpservletrequest; 6. import javax.servlet.http.httpservletresponse; 7. public class hello1 extends HttpServlet { 8. public hello1() { 9. super(); 10. } 11. public void destroy() { 12. super.destroy(); 13. } 14. public void doget(httpservletrequest request, HttpServletResponse respon se) 15. throws ServletException, IOException { 16. response.setcontenttype("text/html"); 17. PrintWriter out = response.getwriter(); 18. out.println("<!doctype HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitio nal//en\">"); 19. out.println("<html>"); 20. out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 21. out.println(" <BODY>"); 22. out.print("hello world! This is "); 23. out.print(this.getclass()); 24. out.println(", using the GET method!"); 25. out.println("</body>"); 2

3 26. out.println("</html>"); 27. out.flush(); 28. out.close(); 29. } 30. public void dopost(httpservletrequest request, HttpServletResponse respo nse) throws ServletException, IOException { 31. doget(request, response);} 32. } dopost 方法 : 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.servletexception; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.http.httpservletrequest; 6. import javax.servlet.http.httpservletresponse; 7. public class hello2 extends HttpServlet { 8. public hello2() { 9. super(); 10. } 11. public void destroy() { 12. super.destroy(); 13. } 14. public void dopost(httpservletrequest request, HttpServletResponse respo nse) 15. throws ServletException, IOException { 16. response.setcontenttype("text/html"); 17. PrintWriter out = response.getwriter(); 18. out.println("<!doctype HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitio nal//en\">"); 19. out.println("<html>"); 20. out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 21. out.println(" <BODY>"); 22. out.print(" hello world! This is "); 23. out.print(this.getclass()); 24. out.println(", using the POST method"); 25. out.println(" </BODY>"); 26. out.println("</html>"); 27. out.flush(); 28. out.close(); 29. } 30. public void doget(httpservletrequest request, HttpServletResponse respon se) { 3

4 31. try { 32. dopost(request, response); 33. } catch (ServletException e) { 34. // TODO Auto-generated catch block 35. e.printstacktrace(); 36. } catch (IOException e) { 37. // TODO Auto-generated catch block 38. e.printstacktrace(); 39. }} 40. } 配置文件 : 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app xmlns:xsi=" xmlns=" /java.sun.com/xml/ns/javaee" xmlns:web=" b-app_2_5.xsd" xsi:schemalocation=" java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5" id="webapp_ "> 3. <servlet> 4. <servlet-name>hello1</servlet-name> 5. <servlet-class>hello1</servlet-class> 6. </servlet> 7. <servlet> 8. <servlet-name>hello2</servlet-name> 9. <servlet-class>hello2</servlet-class> 10. </servlet> 11. <servlet-mapping> 12. <servlet-name>hello1</servlet-name> 13. <url-pattern>/hello1</url-pattern> 14. </servlet-mapping> 15. <servlet-mapping> 16. <servlet-name>hello2</servlet-name> 17. <url-pattern>/hello2</url-pattern> 18. </servlet-mapping> 19. </web-app> 项目部署 : 1. 新建一个空的文件夹 2. 启动 tomcat, 分别运行 GET 与 POST 方法 4

5 1. 空文件夹 2. 启动 tomcat 实验二 : 登录注册界面 1. LOGIN 界面工程目录 : 5

6 SERVLET 类 : 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.requestdispatcher; 4. import javax.servlet.servletexception; 5. import javax.servlet.http.httpservlet; 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 8. public class ShowMsgServlet1 extends HttpServlet { 9. protected void dopost(httpservletrequest request, HttpServletResponse re sponse) 10. throws ServletException, IOException { 11. request.setcharacterencoding("utf-8");// 设置编码方式为 UTF-8, 能正确显示汉字 12. response.setcontenttype("text/html;charset=utf-8"); 13. PrintWriter out=response.getwriter(); 14. try{ 15. String username=request.getparameter("username"); 16. String userpass=request.getparameter("userpass"); 17. if("jeff".equalsignorecase(username)&&" ".equals(userpass )){ 18. RequestDispatcher rd=request.getrequestdispatcher("index.jsp "); 19. rd.forward(request, response); 20. }else{ 21. out.print(" 用户名或者密码错误, 请重新输入!"); 22. RequestDispatcher rd=request.getrequestdispatcher("login.jsp "); 23. rd.include(request, response); 24. } 25. out.printf(username); 26. }finally{ 27. out.close(); 28. } 29. } 30. } JSP: 1. INDEX.JSP 1. <%@ page language="java" import="java.util.*" pageencoding="utf-8"%> 2. <% 3. String path = request.getcontextpath(); 6

7 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'index.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 21. <h1> 欢迎光临!</h1> 22. </body> 23. </html> 2.LOGIN.JSP 1. <%@ page language="java" import="java.util.*" pageencoding="utf-8"%> 2. <% 3. String path = request.getcontextpath(); 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'login.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 7

8 21. <form name="frm" method="post" action="showmsgservlet1"> 22. <table frame="box" cellspacing="5" align="left" width="226" hei ght="185"> 23. <tr> 24. <td colspan="2" align="center"><p><h3> 用户登录 </h3></p></td> 25. </tr> 26. <tr> 27. <td><label for="username"> 用户名 </label></td> 28. <td><input type="text" name="username" value=""/></td> 29. </tr> 30. <tr> 31. <td><label for="userpass"> 密码 </label></td> 32. <td><input type="password" name="userpass" value=""/></t d> 33. </tr> 34. <tr> 35. <td colspan="2"> 36. <input type="submit" src="./newbtn.png" width=100% 37. height=80% border="0" value=" 登录 " 38. onclick="document.forms['frm'].submit();"> 39. </td> 40. </tr> 41. <tr> </tr> 42. </table> 43. </form> 44. </body> 45. </html> WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>login</servlet-name> 13. <servlet-class>showmsgservlet1</servlet-class> 8

9 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>login</servlet-name> 17. <url-pattern>/</url-pattern> 18. </servlet-mapping> 19. </web-app> 项目部署 : 1. 登录界面 2. 登录信息 3. 页面跳转 4. 错误提示 9

unknownhostexception; 3. import java.util.date; 4. import javax.

10 2. REGISTER 界面工程目录 : JAR 包 : SERVLET 类 : 应用 SERVLET 修改 VALIDATE 属性值为 true, 以屏蔽权限验证 1. import java.io.ioexception; 2. import java.net.unknownhostexception; 3. import java.util.date; 4. import javax.servlet.servletexception; 5. import javax.servlet.http.httpservlet; 10

11 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 8. import org.apache.commons.beanutils.beanutils; 9. import org.apache.commons.beanutils.convertutils; 10. import org.apache.commons.beanutils.locale.converters.datelocaleconverter; 11. /** 12. * 处理用户注册的 Servlet 13. gacl 14. * 15. */ 16. public class RegisterServlet extends HttpServlet { 17. public void doget(httpservletrequest request, HttpServletResponse response) 18. throws ServletException, IOException { 19. // 将客户端提交的表单数据封装到 RegisterFormBean 对象中 20. RegisterFormBean formbean = WebUtils.requestBean(request,RegisterFormBean.cl ass); 21. // 校验用户注册填写的表单数据 22. if (formbean.validate() == true) { 23. request.setattribute("formbean", formbean); 24. request.getrequestdispatcher("/index.jsp").forward(request, response); 25. return; 26. } 27. User user = new User(); 28. try { 29. // 注册字符串到日期的转换器 30. //ConvertUtils.register(new DateLocaleConverter(), Date.class); 31. //BeanUtils.copyProperties(user, formbean);// 把表单的数据填充到 javabean 中 32. user.setid(webutils.makeid());// 设置用户的 Id 属性 33. UserServiceImpl service = new UserServiceImpl(); 34. // 调用 service 层提供的注册用户服务实现用户注册 35. //service.registeruser(user); 36. String message = String.format( 37. " 注册成功!! 秒后为您自动跳到登录页面!! <meta http-equiv='refresh' content=';url=%s'/>", 38. request.getcontextpath()+"/servlet/loginuiservlet"); 39. request.setattribute("message",message); 40. request.getrequestdispatcher("/index.jsp").forward(request,response); 41. } catch (UnknownHostException e) { 42. formbean.geterrors().put("username", " 注册用户已存在!!"); 43. request.setattribute("formbean", formbean); 44. request.getrequestdispatcher("/register.jsp").forward(request, response); 45. } catch (Exception e) { 46. e.printstacktrace(); // 在后台记录异常 11

12 47. request.setattribute("message", " 对不起, 注册失败!!"); 48. request.getrequestdispatcher("/index.jsp").forward(request,response); 49. } 50. } 51. public void dopost(httpservletrequest request, HttpServletResponse response) 52. { 53. try { 54. doget(request, response); 55. } catch (ServletException e) { 56. // TODO Auto-generated catch block 57. //e.printstacktrace(); 58. } catch (IOException e) { 59. // TODO Auto-generated catch block 60. //e.printstacktrace(); 61. } 62. } 63. } 辅助程序 : 1. REGISTERFORMBEAN 1. import java.util.hashmap; 2. import java.util.map; 3. import org.apache.commons.beanutils.locale.converters.datelocaleconverter; 4. /** 5. * 封装的用户注册表单 bean, 用来接收 register.jsp 中的表单输入项的值 6. * RegisterFormBean 中的属性与 register.jsp 中的表单输入项的 name 一一对应 7. * RegisterFormBean 的职责除了负责接收 register.jsp 中的表单输入项的值之外还担任着校验表单输入项的值的合法性 8. gacl 9. * 10. */ 11. public class RegisterFormBean { 12. //RegisterFormBean 中的属性与 register.jsp 中的表单输入项的 name 一一对应 13. //<input type="text" name="username"/> 14. private String username; 15. //<input type="password" name="userpwd"/> 16. private String userpwd; 17. //<input type="password" name="confirmpwd"/> 18. private String confirmpwd; 19. //<input type="text" name=" "/> 20. private String ; 21. //<input type="text" name="birthday"/> 12

13 22. private String birthday; 23. /** 24. * 存储校验不通过时给用户的错误提示信息 25. */ 26. private Map<String, String> errors = new HashMap<String, String>(); 27. public Map<String, String> geterrors() { 28. return errors; 29. } 30. public void seterrors(map<string, String> errors) { 31. this.errors = errors; 32. } 33. /* 34. * validate 方法负责校验表单输入项 35. * 表单输入项校验规则 : 36. * private String username; 用户名不能为空, 并且要是 - 的字母 abcdabcd 37. * private String userpwd; 密码不能为空, 并且要是 - 的数字 38. * private String confirmpwd; 两次密码要一致 39. * private String ; 可以为空, 不为空要是一个合法的邮箱 40. * private String birthday; 可以为空, 不为空时, 要是一个合法的日期 41. */ 42. public boolean validate() { 43. boolean isok = true; 44. if (this.username == null this.username.trim().equals("")) { 45. isok = false; 46. errors.put("username", " 用户名不能为空!!"); 47. } else { 48. if (!this.username.matches("[a-za-z]{,}")) { 49. isok = false; 50. errors.put("username", " 用户名必须是 - 位的字母!!"); 51. } 52. } 53. if (this.userpwd == null this.userpwd.trim().equals("")) { 54. isok = false; 55. errors.put("userpwd", " 密码不能为空!!"); 56. } else { 57. if (!this.userpwd.matches("\\d{,}")) { 58. isok = false; 59. errors.put("userpwd", " 密码必须是 - 位的数字!!"); 60. } 61. } 62. // private String password; 两次密码要一致 63. if (this.confirmpwd!= null) { 64. if (!this.confirmpwd.equals(this.userpwd)) { 65. isok = false; 13

14 66. errors.put("confirmpwd", " 两次密码不一致!!"); 67. } 68. } 69. // private String ; 可以为空, 不为空要是一个合法的邮箱 70. if (this. != null &&!this. .trim().equals("")) { 71. if (!this. .matches("\\w+@\\w+(\\.\\w+)+")) { 72. isok = false; 73. errors.put(" ", " 邮箱不是一个合法邮箱!!"); 74. } 75. } 76. // private String birthday; 可以为空, 不为空时, 要是一个合法的日期 77. if (this.birthday!= null &&!this.birthday.trim().equals("")) { 78. try { 79. DateLocaleConverter conver = new DateLocaleConverter(); 80. conver.convert(this.birthday); 81. } catch (Exception e) { 82. isok = false; 83. errors.put("birthday", " 生日必须要是一个日期!!"); 84. } 85. } 86. return isok; 87. } 88. public String getusername() { 89. return username; 90. } 91. public void setusername(string username) { 92. this.username = username; 93. } 94. public String getuserpwd() { 95. return userpwd; 96. } 97. public void setuserpwd(string userpwd) { 98. this.userpwd = userpwd; 99. } 100. public String getconfirmpwd() { 101. return confirmpwd; 102. } 103. public void setconfirmpwd(string confirmpwd) { 104. this.confirmpwd = confirmpwd; 105. } 106. public String get () { 107. return ; 108. } 109. public void set (string ) { 14

15 110. this. = ; 111. } 112. public String getbirthday() { 113. return birthday; 114. } 115. public void setbirthday(string birthday) { 116. this.birthday = birthday; 117. } 118. } 2. USER 1. import java.io.serializable; 2. import java.util.date; 3. public class User implements Serializable { 4. private static final int L = 0; 5. private static final long serialversionuid = -L; 6. // 用户 ID 7. private String id; 8. // 用户名 9. private String username; 10. // 用户密码 11. private String userpwd; 12. // 用户邮箱 13. private String ; 14. // 用户生日 15. private Date birthday; 16. public String getid() { 17. return id; 18. } 19. public void setid(string id) { 20. this.id = id; 21. } 22. public String getusername() { 23. return username; 24. } 25. public void setusername(string username) { 26. this.username = username; 27. } 28. public String getuserpwd() { 29. return userpwd; 30. } 31. public void setuserpwd(string userpwd) { 32. this.userpwd = userpwd; 33. } 15

16 34. public String get () { 35. return ; 36. } 37. public void set (string ) { 38. this. = ; 39. } 40. public Date getbirthday() { 41. return birthday; 42. } 43. public void setbirthday(date birthday) { 44. this.birthday = birthday; 45. } 46. } 3. USERSERVICEIMPL 1. import java.net.unknownhostexception; 2. import java.util.list; 3. public class UserServiceImpl { 4. User dao; 5. public User getdao() { 6. return dao; 7. } 8. public void setdao(user dao) { 9. this.dao = dao; 10. } 11. } 4. WEBUTILS 1. import java.util.enumeration; 2. import java.util.uuid; 3. import javax.servlet.http.httpservletrequest; 4. import org.apache.commons.beanutils.beanutils; 5. /** 6. gacl 7. * 把 request 对象中的请求参数封装到 bean 中 8. */ 9. public class WebUtils { 10. /** 11. * 将 request 对象转换成 T 对象 12. request 13. clazz */ 16

17 16. public static <T> T requestbean(httpservletrequest request,class<t> clazz){ 17. try{ 18. T bean = clazz.newinstance(); 19. Enumeration<String> e = request.getparameternames(); 20. while(e.hasmoreelements()){ 21. String name = (String) e.nextelement(); 22. String value = request.getparameter(name); 23. //BeanUtils.setProperty(bean, name, value); 24. } 25. return bean; 26. }catch (Exception e) { 27. throw new RuntimeException(e); 28. } 29. } 30. /** 31. * 生成 UUID */ 34. public static String makeid(){ 35. return UUID.randomUUID().toString(); 36. } 37. } 5. IUSERSERVICE 1. import java.net.unknownhostexception; 2. public interface IUserService { 3. /** 4. * 提供注册服务 5. user 6. UserExistException 7. */ 8. void registeruser(user user) throws UnknownHostException; 9. /** 10. * 提供登录服务 11. username 12. userpwd */ 15. User loginuser(string username, String userpwd); 16. } INDEX.JSP 与登录界面一致 17

18 REGISTER.JSP 1. page language="java" pageencoding="utf-8"%> 2. <!DOCTYPE HTML> 3. <html> 4. <head> 5. <title> 用户注册 </title> 6. </head> 7. <body style="text-align: center;"> 8. <form action="${pagecontext.request.contextpath}/servlet/registerservlet" me thod="post"> 9. <table width="%" border=""> 10. <tr> 11. <td> 用户名 </td> 12. <td> 13. <input type="text" name="username"> 14. </td> 15. </tr> 16. <tr> 17. <td> 密码 </td> 18. <td> 19. <input type="password" name="userpwd"> 20. </td> 21. </tr> 22. <tr> 23. <td> 确认密码 </td> 24. <td> 25. <input type="password" name="confirmpwd"> 26. </td> 27. </tr> 28. <tr> 29. <td> 邮箱 </td> 30. <td> 31. <input type="text" name=" "> 32. </td> 33. </tr> 34. <tr> 35. <td> 生日 </td> 36. <td> 37. <input type="text" name="birthday"> 38. </td> 39. </tr> 40. <tr> 41. <td> 18

19 42. <input type="reset" value=" 清空 "> 43. </td> 44. <td> 45. <input type="submit" value=" 注册 "> 46. </td> 47. </tr> 48. </table> 49. </form> 50. </body> 51. </html> WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>register</servlet-name> 13. <servlet-class>registerservlet</servlet-class> 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>register</servlet-name> 17. <url-pattern>/</url-pattern> 18. </servlet-mapping> 19. </web-app> 项目部署 : 1. 输入任意注册信息 19

2. 页面跳转实验三 : 请求包含与转发工程目录 : 转发 SERVLET: 1. DESTINATION 1. package com.test; 2. import java.io.ioexception; 3. import java.io.printwriter; 4. import javax.servlet.genericservlet; 5. import javax.servlet.requestdispatcher; 6.

20 2. 页面跳转实验三 : 请求包含与转发工程目录 : 转发 SERVLET: 1. DESTINATION 1. package com.test; 2. import java.io.ioexception; 3. import java.io.printwriter; 4. import javax.servlet.genericservlet; 5. import javax.servlet.requestdispatcher; 6. import javax.servlet.servletcontext; 7. import javax.servlet.servletexception; 8. import javax.servlet.servletrequest; 9. import javax.servlet.servletresponse; 10. import javax.servlet.http.httpservlet; 11. import javax.servlet.http.httpservletrequest; 12. import javax.servlet.http.httpservletresponse; 13. public class ForwardDestinationServlet extends HttpServlet { 14. private static final long serialversionuid = L; 16. public void service(httpservletrequest req, HttpServletResponse res) 20

21 17. throws ServletException, IOException { 18. String message = (String)req.getAttribute("msg"); 19. PrintWriter out = res.getwriter(); 20. out.println("<br/>this is from ForwardDestinationServlet<br/>"); 21. out.println("<br/><br/>"); 22. //out.println(message); 23. out.close(); 24. } 25. } 2. SOURCE 1. package com.test; 2. import java.io.ioexception; 3. import java.io.printwriter; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.servletexception; 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 8. import javax.servlet.servletcontext; 9. import javax.servlet.requestdispatcher; 10. public class ForwardSourceServlet extends HttpServlet { 11. /** 12. * 13. */ 14. private static final long serialversionuid = L; 16. public void service(httpservletrequest req, HttpServletResponse res) 17. throws ServletException, IOException { 18. String message = null; 19. // add attribute to request 20. req.setattribute("msg", message); 21. // forward the request to ForwardDestinationServlet 22. ServletContext context = getservletcontext(); 23. RequestDispatcher dispatcher = context.getrequestdispatcher("/forwar d1"); 24. // try to output something into response 25. PrintWriter out = res.getwriter(); 26. out.println("output from ForwardSourceServlet before forwarding requ est"); 27. ServletContext context1 = getservletcontext(); 28. RequestDispatcher headdispatcher = context.getrequestdispatcher("/in cludeheader.jsp"); 29. RequestDispatcher bodydispatcher = context.getrequestdispatcher("/fo rward2"); 21

22 30. RequestDispatcher footdispatcher = context.getrequestdispatcher("/in cludefooter.jsp"); 31. headdispatcher.include(req, res); 32. bodydispatcher.include(req, res); 33. footdispatcher.include(req, res); 34. if (dispatcher!= null){ 35. dispatcher.forward(req, res); 36. } 37. out.println("output from ForwardSourceServlet after forwarding reque st"); 38. out.close(); 39. } 40. } 包含 SERVLET: 1. DESTINATION 1. package com.test; 2. import java.io.ioexception; 3. import java.io.printwriter; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.servletexception; 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 8. import javax.servlet.servletcontext; 9. import javax.servlet.requestdispatcher; 10. public class IncludeDestinationServlet extends HttpServlet { 11. protected void doget(httpservletrequest req, HttpServletResponse resp) 12. throws ServletException, IOException{ 13. PrintWriter out = resp.getwriter(); 14. out.println("<br/>this is from IncludeDestinationServlet<br/>"); 15. out.println("<br/><br/>"); 16. } 17. } 2. SOURCE 1. package com.test; 2. import java.io.ioexception; 3. import java.io.printwriter; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.servletexception; 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 22

23 8. import javax.servlet.servletcontext; 9. import javax.servlet.requestdispatcher; 10. public class IncludeSourceServlet extends HttpServlet { 11. protected void doget(httpservletrequest req, HttpServletResponse resp) 12. throws ServletException, IOException{ 13. resp.setcontenttype("text/html"); 14. PrintWriter out = resp.getwriter(); 15. out.println("<html><header><title>include Test</title></header>"); 16. out.println("<body>"); 17. ServletContext context = getservletcontext(); 18. RequestDispatcher headdispatcher = context.getrequestdispatcher("/in cludeheader.jsp"); 19. RequestDispatcher bodydispatcher = context.getrequestdispatcher("/in clude2"); 20. RequestDispatcher footdispatcher = context.getrequestdispatcher("/in cludefooter.jsp"); 21. headdispatcher.include(req, resp); 22. bodydispatcher.include(req, resp); 23. footdispatcher.include(req, resp); 24. out.println("</body></html>"); 25. out.close(); 26. } 27. } JSP: 1. HEADER 1. <%@ page language="java" import="java.util.*" pageencoding="iso "%> 2. <% 3. String path = request.getcontextpath(); 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'MyJsp.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 23

24 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 21. This is from includeheader.html <br/> 22. </body> 23. </html> 2. FOOTER 1. page language="java" import="java.util.*" pageencoding="iso "%> 2. <% 3. String path = request.getcontextpath(); 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'includefooter.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 21. This is from includefooter.html 22. <br/> 23. </body> 24. </html> WEB.XML 1. <pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?> 2. <web-app xmlns:xsi=" xmlns=" /java.sun.com/xml/ns/javaee" xmlns:web=" b-app_2_5.xsd" xsi:schemalocation=" java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5" id="webapp_ "> 24

25 3. <display-name>1d</display-name> 4. <welcome-file-list> 5. <welcome-file>index.html</welcome-file> 6. <welcome-file>index.htm</welcome-file> 7. <welcome-file>index.jsp</welcome-file> 8. <welcome-file>default.html</welcome-file> 9. <welcome-file>default.htm</welcome-file> 10. <welcome-file>default.jsp</welcome-file> 11. </welcome-file-list> 12. <servlet> 13. <servlet-name>hello1</servlet-name> 14. <servlet-class>hello1</servlet-class> 15. </servlet> 16. <servlet> 17. <servlet-name>hello2</servlet-name> 18. <servlet-class>hello2</servlet-class> 19. </servlet> 20. <filter> 21. <filter-name>filter1</filter-name> 22. <filter-class>com.filter.servletfilter1</filter-class> 23. </filter> 24. <filter> 25. <filter-name>filter2</filter-name> 26. <filter-class>com.filter.servletfilter2</filter-class> 27. </filter> 28. <filter> 29. <filter-name>characterfilter</filter-name> 30. <filter-class>com.filter.encodingfilter</filter-class> 31. <init-param> 32. <param-name>encoding</param-name> 33. <param-value>utf-8</param-value> 34. </init-param> 35. </filter> 36. <servlet-mapping> 37. <servlet-name>hello1</servlet-name> 38. <url-pattern>/hello1</url-pattern> 39. </servlet-mapping> 40. <servlet-mapping> 41. <servlet-name>hello2</servlet-name> 42. <url-pattern>/hello2</url-pattern> 43. </servlet-mapping> 44. <filter-mapping> 45. <filter-name>filter1</filter-name> 46.  25

26 47. <url-pattern>/test1</url-pattern> 48. </filter-mapping> 49. <filter-mapping> 50. <filter-name>filter2</filter-name> 51.  52. <url-pattern>/test2</url-pattern> 53. </filter-mapping> 54. <filter-mapping> 55. <filter-name>characterfilter</filter-name> 56.  57. <url-pattern>/*</url-pattern> 58. </filter-mapping> 59. <servlet> 60. <servlet-name>test</servlet-name> 61. <servlet-class>com.filter.myfiltertestservlet</servlet-class> 62. </servlet> 63. <servlet-mapping> 64. <servlet-name>test</servlet-name> 65. <url-pattern>/test</url-pattern> 66. </servlet-mapping> 67. <servlet> 68. <servlet-name>forward1</servlet-name> 69. <servlet-class>com.test.forwardsourceservlet</servlet-class> 70. </servlet> 71. <servlet-mapping> 72. <servlet-name>forward1</servlet-name> 73. <url-pattern>/forward1</url-pattern> 74. </servlet-mapping> 75. <servlet> 76. <servlet-name>forward2</servlet-name> 77. <servlet-class>com.test.forwarddestinationservlet</servlet-class> 78. </servlet> 79. <servlet-mapping> 80. <servlet-name>forward2</servlet-name> 81. <url-pattern>/forward2</url-pattern> 82. </servlet-mapping> 83. <servlet> 84. <servlet-name>include1</servlet-name> 85. <servlet-class>com.test.includesourceservlet</servlet-class> 86. </servlet> 87. <servlet-mapping> 88. <servlet-name>include1</servlet-name> 89. <url-pattern>/include1</url-pattern> 90. </servlet-mapping> 26

27 91. <servlet> 92. <servlet-name>include2</servlet-name> 93. <servlet-class>com.test.includedestinationservlet</servlet-class> 94. </servlet> 95. <servlet-mapping> 96. <servlet-name>include2</servlet-name> 97. <url-pattern>/include2</url-pattern> 98. </servlet-mapping> 99. </web-app> 运行结果 : SERVICE 服务不同于 DOGET 方法, 它可以直接解析输出超文本代码因此, 无论是包含还是转发, 程序都会把 DESTINATION 调进来但是, 对于包含模式,SOURCE 文件会把 DESTINATION 的内容以文本形式传进来 ; 而在转发模式下, 包含的内容以超文本显示 : 1. INCLUDE 2. FORWARD 27

28 实验四 : 权限验证与限制工程目录 : CAPABILITY( 导入 xwork.jar): 过滤类 : 1. package filter; 2. import java.io.ioexception; 3. import java.util.hashset; 28

29 4. import java.util.set; 5. import javax.servlet.filter; 6. import javax.servlet.filterchain; 7. import javax.servlet.filterconfig; 8. import javax.servlet.servletexception; 9. import javax.servlet.servletrequest; 10. import javax.servlet.servletresponse; 11. import javax.servlet.http.httpservletrequest; 12. import javax.servlet.http.httpservletresponse; 13. import javax.servlet.http.httpsession; 14. public class sessioncheck implements Filter{ 15. protected FilterConfig filterconfig = null; 16. private String redirecturl = null; 17. private Set<String> notcheckurllist = new HashSet<String>(); 18. private String sessionkey = null; 20. public void destroy() { 21. notcheckurllist.clear(); 22. } 24. public void dofilter(servletrequest servletrequest, 25. ServletResponse servletresponse, FilterChain filterchain) 26. throws IOException, ServletException { 27. HttpServletRequest request = (HttpServletRequest) servletrequest; 28. HttpServletResponse response = (HttpServletResponse) servletresponse ; 29. HttpSession session = request.getsession(); 30. if (sessionkey == null) { 31. filterchain.dofilter(request, response); 32. return; 33. } 34. if ((!checkrequesturiintnotfilterlist(request)) 35. && session.getattribute(sessionkey) == null) { 36. response.sendredirect(request.getcontextpath() + redirecturl); 37. return; 38. } 39. filterchain.dofilter(servletrequest, servletresponse); 40. } 41. private boolean checkrequesturiintnotfilterlist(httpservletrequest req uest) { 42. String uri = request.getservletpath() (request.getpathinfo() == null? "" : request.getpathinfo()); 29

30 44. String temp = request.getrequesturi(); 45. temp = temp.substring(request.getcontextpath().length() + 1); 46. // System.out.println(" 是否包括 : "+uri+";"+notcheckurllist+"=="+notcheckurllist.contains(uri)); 47. return notcheckurllist.contains(uri); 48. } 50. public void init(filterconfig filterconfig) throws ServletException { 51. this.filterconfig = filterconfig; 52. redirecturl = filterconfig.getinitparameter("redirecturl"); 53. sessionkey = filterconfig.getinitparameter("checksessionkey"); 54. String notcheckurlliststr = filterconfig 55..getInitParameter("notCheckURLList"); 56. if (notcheckurlliststr!= null) { 57. System.out.println(notCheckURLListStr); 58. String[] params = notcheckurlliststr.split(","); 59. for (int i = 0; i < params.length; i++) { 60. notcheckurllist.add(params[i].trim()); 61. } 62. } 63. } 64. } 拦截类 : 1. package interceptor; 2. import java.util.map; 3. import com.opensymphony.xwork2.action; 4. import com.opensymphony.xwork2.actioncontext; 5. import com.opensymphony.xwork2.actioninvocation; 6. import com.opensymphony.xwork2.interceptor.abstractinterceptor; 7. public class authinterceptor extends AbstractInterceptor { 8. private static final long serialversionuid = L; 9. private String sessionkey="loginname"; 10. private String parmkey="withoutauthentication"; 11. private boolean excluded; 13. public String intercept(actioninvocation invocation) throws Exception { 14. ActionContext ac=invocation.getinvocationcontext(); 15. Map<?,?> session =ac.getsession(); 16. String parm=(string) ac.getparameters().get(parmkey); 17. if(parm!=null){ 30

31 18. excluded=parm.touppercase().equals("true"); 19. } 20. String user=(string)session.get(sessionkey); 21. if(excluded user!=null){ 22. return invocation.invoke(); 23. } 24. ac.put("tip", " 您还没有登录!"); 25. // 直接返回 login 的逻辑视图 26. return Action.LOGIN; 27. } 28. } LOGIN.JSP 与 INDEX.JSP 与登录注册界面中相同配置文件 : 1. WEB.XML 1. <pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?> 2. <web-app id="webapp_id"> 3. <display-name>1d</display-name> 4. <servlet> 5. <servlet-name>action</servlet-name> 6. <servlet-class>org.apache.struts.action.actionservlet</servlet-class> 7. <init-param> 8. <param-name>config</param-name> 9. <param-value>/web-inf/struts-config.xml</param-value> 10. </init-param> 11. <init-param> 12. <param-name>debug</param-name> 13. <param-value>3</param-value> 14. </init-param> 15. <init-param> 16. <param-name>detail</param-name> 17. <param-value>3</param-value> 18. </init-param> 19. <load-on-startup>0</load-on-startup> 20. </servlet> 21. <servlet-mapping> 22. <servlet-name>action</servlet-name> 23. <url-pattern>*.do</url-pattern> 24. </servlet-mapping> 25. <welcome-file-list> 26. <welcome-file>index.html</welcome-file> 31

32 27. <welcome-file>index.htm</welcome-file> 28. <welcome-file>index.jsp</welcome-file> 29. <welcome-file>default.html</welcome-file> 30. <welcome-file>default.htm</welcome-file> 31. <welcome-file>default.jsp</welcome-file> 32. </welcome-file-list> 33. <filter> 34. <filter-name>sessioninvalidate1</filter-name> 35. <filter-class>filter.sessioncheck</filter-class> 36. <init-param> 37. <param-name>checksessionkey</param-name> 38. <param-value>loginname</param-value> 39. </init-param> 40. <init-param> 41. <param-name>redirecturl</param-name> 42. <param-value>/login.jsp</param-value> 43. </init-param> 44. <init-param> 45. <param-name>notcheckurllist</param-name> 46. <param-value>/index.jsp,/login.jsp</param-value> 47. </init-param> 48. </filter> 49. <filter> 50. <filter-name>sessioninvalidate2</filter-name> 51. <filter-class>filter.sessioncheck</filter-class> 52. <init-param> 53. <param-name>checksessionkey</param-name> 54. <param-value>loginname</param-value> 55. </init-param> 56. <init-param> 57. <param-name>redirecturl</param-name> 58. <param-value>/index.jsp</param-value> 59. </init-param> 60. <init-param> 61. <param-name>notcheckurllist</param-name> 62. <param-value>/login.jsp,/index.jsp</param-value> 63. </init-param> 64. </filter> 65.  66. <filter-mapping> 67. <filter-name>sessioninvalidate1</filter-name> 68. <url-pattern>/jsp1</url-pattern> 69. </filter-mapping> 70.  32

33 71. <filter-mapping> 72. <filter-name>sessioninvalidate2</filter-name> 73. <url-pattern>/jsp2</url-pattern> 74. </filter-mapping> 75. </web-app> 2. STRUTS-CONFIG.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <!DOCTYPE struts PUBLIC 3. "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4. " 5. <struts> 6. <constant name="struts.devmode" value="true" /> 7. <package name="default" namespace="" extends="struts-default"> 8.  9. <interceptors> 10.  11. <interceptor name="authenticationinterceptor" class="interceptor.a uthinterceptor" /> 12. <interceptor-stack name="defualtsecuritystackwithauthentication"> 13. <interceptor-ref name="defaultstack" /> 14. <interceptor-ref name="authenticationinterceptor" /> 15. </interceptor-stack> 16. </interceptors> 17.  18. <global-results> 19. <result name="index">/index.jsp</result> 20. <result name="login">/login.jsp</result> 21. </global-results> 22. <action name="login" class="action.loginaction"> 23. <param name="withoutauthentication">true</param> 24. <result name="success">/index.jsp</result> 25. <result name="input">/login.jsp</result> 26. </action> 27. </package> 28. </struts> 3. PROPERTIES 1. # Resources for parameter 'com.yourcompany.struts.applicationresources' 2. # Project servletfilter 33

34 运行结果 : 地址由 /url-pattern 跳转到 jsp, 输入 /jsp1,/jsp2 立刻跳转为 index.jsp,login.jsp 即实现了如下响应模式 : request filter interceptor action jsp 实验五 : 拦截器 (filter) 执行流程工程目录 : 34

35 SERVLET 类 : 1. FILTER1 1. package com.filter; 2. import java.io.ioexception; 3. import javax.servlet.filter; 4. import javax.servlet.filterchain; 5. import javax.servlet.filterconfig; 6. import javax.servlet.servlet; 7. import javax.servlet.servletconfig; 8. import javax.servlet.servletexception; 9. import javax.servlet.servletrequest; 10. import javax.servlet.servletresponse; 11. public class ServletFilter1 implements Filter { 13. public void destroy() { 14. } 16. public void dofilter(servletrequest request, ServletResponse response, 17. FilterChain chain) throws IOException, ServletException { 18. System.out.println(" 第一个拦截器的 chain.dofilter() 之前 \t\t\t\t\t"+" "); 19. chain.dofilter(request, response); 20. System.out.println(" 第一个拦截器的 chain.dofilter() 之后 \t\t\t\t\t"+" "); 21. } 23. public void init(filterconfig arg0) throws ServletException { 24. } 25. } 2. FILTER2 1. package com.filter; 2. import java.io.ioexception; 3. import javax.servlet.filter; 4. import javax.servlet.filterchain; 5. import javax.servlet.filterconfig; 6. import javax.servlet.servlet; 7. import javax.servlet.servletconfig; 8. import javax.servlet.servletexception; 9. import javax.servlet.servletrequest; 10. import javax.servlet.servletresponse; 11. public class ServletFilter2 implements Filter { 35

36 13. public void destroy() { 14. } 16. public void dofilter(servletrequest request, ServletResponse response, 17. FilterChain chain) throws IOException, ServletException { 18. System.out.println(" 第二个拦截器的 chain.dofilter() 之前 \t\t\t\t\t"+" "); 19. chain.dofilter(request, response); 20. System.out.println(" 第二个拦截器的 chain.dofilter() 之后 \t\t\t\t\t"+" "); 21. } 23. public void init(filterconfig arg0) throws ServletException { 24. } 25. } 编码类 : 1. package com.filter; 2. import java.io.ioexception; 3. import java.io.unsupportedencodingexception; 4. import javax.servlet.filter; 5. import javax.servlet.filterchain; 6. import javax.servlet.filterconfig; 7. import javax.servlet.servletexception; 8. import javax.servlet.servletrequest; 9. import javax.servlet.servletresponse; 10. import javax.servlet.http.httpservletrequest; 11. import javax.servlet.http.httpservletrequestwrapper; 12. import javax.servlet.http.httpservletresponse; 13. public class EncodingFilter implements Filter { 14. private static String encoding; 15. private static final String DEFAULT_CHARSET="UTF-8"; 16. public void destroy() { 17. System.out.println(" destroy "); 18. } 19. public void dofilter(servletrequest request, ServletResponse response, 20. FilterChain chain) throws IOException, ServletException { 21. System.out.println(" doFilter "); 22. HttpServletRequest httprequest = (HttpServletRequest) request; 23. HttpServletResponse httpresponse=(httpservletresponse)response; 24. if("get".equals(httprequest.getmethod())){ 36

37 25. EncodingHttpServletRequest wrapper = new EncodingHttpServletRequ est(httprequest, encoding); 26. chain.dofilter(wrapper, response); 27. }else{ 28. httprequest.setcharacterencoding(encoding); 29. httpresponse.setcontenttype("text/html;charset="+encoding); 30. chain.dofilter(request, response); 31. } 32. } 33. private static class EncodingHttpServletRequest extends HttpServletRequ estwrapper{ 34. private HttpServletRequest request; 35. public EncodingHttpServletRequest(HttpServletRequest request,string encoding) { 36. super(request); 37. this.request = request; 38. } 40. public String getparameter(string name) { 41. String value = request.getparameter(name); 42. try { 43. value = new String(value.getBytes("iso8859-1"), encoding); 44. } catch (UnsupportedEncodingException e) { 45. e.printstacktrace(); 46. } 47. return super.getparameter(name); 48. } 49. } 50. public void init(filterconfig config) throws ServletException { System.out.println(" init "); 53. encoding = config.getinitparameter("encoding"); 54. if(encoding==null "".equals(encoding)) 55. encoding=default_charset; 56. } 57. } 测试类 : 1. package com.filter; 2. import java.io.ioexception; 3. import javax.servlet.servletexception; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.http.httpservletrequest; 6. import javax.servlet.http.httpservletresponse; 37

38 7. public class MyFilterTestServlet extends HttpServlet { 8. private static final long serialversionuid = 1L; 10. protected void service(httpservletrequest request, HttpServletResponse r esponse) 11. throws ServletException, IOException { 12. System.out.println(" 执行 servlet 中的 service() 方法 \t\t\t\t\t"+" "); 13. } 14. } WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app xmlns:xsi=" xmlns=" /java.sun.com/xml/ns/javaee" xmlns:web=" b-app_2_5.xsd" xsi:schemalocation=" java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5" id="webapp_ "> 3. <display-name>1d</display-name> 4. <welcome-file-list> 5. <welcome-file>index.html</welcome-file> 6. <welcome-file>index.htm</welcome-file> 7. <welcome-file>index.jsp</welcome-file> 8. <welcome-file>default.html</welcome-file> 9. <welcome-file>default.htm</welcome-file> 10. <welcome-file>default.jsp</welcome-file> 11. </welcome-file-list> 12. <servlet> 13. <servlet-name>hello1</servlet-name> 14. <servlet-class>hello1</servlet-class> 15. </servlet> 16. <servlet> 17. <servlet-name>hello2</servlet-name> 18. <servlet-class>hello2</servlet-class> 19. </servlet> 20. <filter> 21. <filter-name>filter1</filter-name> 22. <filter-class>com.filter.servletfilter1</filter-class> 23. </filter> 24. <filter> 25. <filter-name>filter2</filter-name> 26. <filter-class>com.filter.servletfilter2</filter-class> 27. </filter> 28. <filter> 38

39 29. <filter-name>characterfilter</filter-name> 30. <filter-class>com.filter.encodingfilter</filter-class> 31. <init-param> 32. <param-name>encoding</param-name> 33. <param-value>utf-8</param-value> 34. </init-param> 35. </filter> 36. <servlet-mapping> 37. <servlet-name>hello1</servlet-name> 38. <url-pattern>/hello1</url-pattern> 39. </servlet-mapping> 40. <servlet-mapping> 41. <servlet-name>hello2</servlet-name> 42. <url-pattern>/hello2</url-pattern> 43. </servlet-mapping> 44. <filter-mapping> 45. <filter-name>filter1</filter-name> 46.  47. <url-pattern>/test1</url-pattern> 48. </filter-mapping> 49. <filter-mapping> 50. <filter-name>filter2</filter-name> 51.  52. <url-pattern>/test2</url-pattern> 53. </filter-mapping> 54. <filter-mapping> 55. <filter-name>characterfilter</filter-name> 56.  57. <url-pattern>/*</url-pattern> 58. </filter-mapping> 59. <servlet> 60. <servlet-name>test</servlet-name> 61. <servlet-class>com.filter.myfiltertestservlet</servlet-class> 62. </servlet> 63. <servlet-mapping> 64. <servlet-name>test</servlet-name> 65. <url-pattern>/test</url-pattern> 66. </servlet-mapping> 67. </web-app> 项目部署 : 1. 执行第一第二次拦截 39

40 2. 注册服务 3. 注销 4. 修改 Test 为星号 40

41 5. 拦截 - 注册服务 - 销毁 6. 去掉断点 41

commons.logging.log; 6. import org.springframework.context.applicationcontext; 7. import org.springframework.context.support.

42 实验六 : 监听器 (contextloaderlistener) 工程目录 : JAR 包 (SPRINGFRAMEWORK): 监听类 : 1. <pre name="code" class="java"> 2. import javax.servlet.servletcontext; 3. import javax.servlet.servletcontextevent; 4. import javax.servlet.servletcontextlistener; 5. import org.apache.commons.logging.log; 6. import org.springframework.context.applicationcontext; 7. import org.springframework.context.support.classpathxmlapplicationcontext; 8. import org.springframework.context.support.filesystemxmlapplicationcontext; 9. import org.springframework.util.assert; 42

43 10. import org.springframework.web.context.configurablewebapplicationcontext; 11. import org.springframework.web.context.contextcleanuplistener; 12. import org.springframework.web.context.contextloader; 13. import org.springframework.web.context.webapplicationcontext; 14. import com.sun.org.apache.commons.logging.logfactory; 15. public class ContextLoaderListener extends ContextLoader implements ServletC ontextlistener { 16. private ContextLoader contextloader; 17. private WebApplicationContext context; 18. public ContextLoaderListener() { 19. } 20. public ContextLoaderListener(WebApplicationContext context) { 21. super(context); 22. } 23. public void contextinitialized(servletcontextevent event) { 24. this.contextloader = createcontextloader(); 25. if (this.contextloader == null) { 26. this.contextloader = this; 27. } 28. this.contextloader.initwebapplicationcontext(event.getservletcontext ()); 29. } 31. protected ContextLoader createcontextloader() { 32. return null; 33. } 35. public ContextLoader getcontextloader() { 36. return this.contextloader; 37. } 38. public void contextdestroy(servletcontextevent event) { 39. if (this.contextloader!= null) { 40. this.contextloader.closewebapplicationcontext(event.getservl etcontext()); 41. } 42. } 43. public WebApplicationContext initwebapplicationcontext(servletcontext se rvletcontext) { 44. if (servletcontext.getattribute(webapplicationcontext.root_w EB_APPLICATION_CONTEXT_ATTRIBUTE)!= null) { 45. throw new IllegalStateException( 46. "Cannot initialize context because there is alr eady a root application context present - " + 43

44 47. "check whether you have multiple ContextLoader* definitions in your web.xml!"); 48. } 49. com.sun.org.apache.commons.logging.log logger = LogFactory.g etlog(contextloader.class); 50. servletcontext.log("initializing Spring root WebApplicationC ontext"); 51. if (logger.isinfoenabled()) { 52. logger.info("root WebApplicationContext: initialization started"); 53. } 54. long starttime = System.currentTimeMillis(); 55. try { 56. if (this.context == null) { 57. this.context = createwebapplicationcontext(servletco ntext); 58. } 59. if (this.context instanceof ConfigurableWebApplicationCo ntext) { 60. ConfigurableWebApplicationContext cwac = (Configurab lewebapplicationcontext) this.context; 61. if (!cwac.isactive()) { 62. if (cwac.getparent() == null) { 63. ApplicationContext parent = loadparentcontex t(servletcontext); 64. cwac.setparent(parent); 65. } 66. //configureandrefreshwebapplicationcontext(cwac, servletcontext); 67. } 68. } 69. servletcontext.setattribute(webapplicationcontext.root_ WEB_APPLICATION_CONTEXT_ATTRIBUTE, this.context); 70. ClassLoader ccl = Thread.currentThread().getContextClas sloader(); 71. if (ccl == ContextLoader.class.getClassLoader()) { 72. WebApplicationContext currentcontext = this.context ; 73. } 74. else if (ccl!= null) { 75. return null; 76. } 77. if (logger.isdebugenabled()) { 44

45 78. logger.debug("published root WebApplicationContext as ServletContext attribute with name [" WebApplicationContext.ROOT_WEB_APPLICATION_C ONTEXT_ATTRIBUTE + "]"); 80. } 81. if (logger.isinfoenabled()) { 82. long elapsedtime = System.currentTimeMillis() - sta rttime; 83. logger.info("root WebApplicationContext: initializa tion completed in " + elapsedtime + " ms"); 84. } 85. return this.context; 86. } 87. catch (RuntimeException ex) { 88. logger.error("context initialization failed", ex); 89. servletcontext.setattribute(webapplicationcontext.root_ WEB_APPLICATION_CONTEXT_ATTRIBUTE, ex); 90. throw ex; 91. } 92. catch (Error err) { 93. logger.error("context initialization failed", err); 94. servletcontext.setattribute(webapplicationcontext.root_ WEB_APPLICATION_CONTEXT_ATTRIBUTE, err); 95. throw err; 96. } 97. } 98. public static WebApplicationContext getwebapplicationcontext(servletcon text sc) { 99. return getwebapplicationcontext(sc, WebApplicationContext.R OOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE); 100. } 101. public static WebApplicationContext getwebapplicationcontext(servletco ntext sc, String attrname) { 102. Assert.notNull(sc, "ServletContext must not be null"); 103. Object attr = sc.getattribute(attrname); 104. if (attr == null) { 105. return null; 106. } 107. if (attr instanceof RuntimeException) { 108. throw (RuntimeException) attr; 109. } 110. if (attr instanceof Error) { 111. throw (Error) attr; 112. } 45

46 113. if (attr instanceof Exception) { 114. throw new IllegalStateException((Exception) attr); 115. } 116. if (!(attr instanceof WebApplicationContext)) { 117. throw new IllegalStateException("Context attribute is not of type WebApplicationContext: " + attr); 118. } 119. return (WebApplicationContext) attr; 120. } 121. public void contextdestroyed(servletcontextevent sce) { 122. // TODO Auto-generated method stub 123. } 124. } 配置文件 : 1. WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app xmlns=" xmlns:xsi=" org/2001/xmlschema-instance" version="2.5" xsi:schemalocation=" un.com/xml/ns/javaee 3. <display-name /> 4. <servlet> 5. <servlet-name>action</servlet-name> 6. <servlet-class>org.apache.struts.action.actionservlet</servlet-class> 7. <init-param> 8. <param-name>config</param-name> 9. <param-value>/web-inf/struts-config.xml</param-value> 10. </init-param> 11. <init-param> 12. <param-name>debug</param-name> 13. <param-value>3</param-value> 14. </init-param> 15. <init-param> 16. <param-name>detail</param-name> 17. <param-value>3</param-value> 18. </init-param> 19. <load-on-startup>0</load-on-startup> 20. </servlet> 21. <servlet-mapping> 22. <servlet-name>action</servlet-name> 23. <url-pattern>*.do</url-pattern> 24. </servlet-mapping> 46

47 25. <welcome-file-list> 26. <welcome-file>index.jsp</welcome-file> 27. </welcome-file-list> 28. <listener> 29. <listener-class>contextloaderlistener</listener-class> 30. </listener> 31. <context-param> 32. <param-name>contextconfiglocation</param-name> 33. <param-value>/web-inf/applicationcontext.xml</param-value> 34. </context-param> 35. </web-app> 2. APPLICATIONCONTEXT.XML 1. <pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?> 2. <beans xmlns=" xmlns:context="ht tp:// xmlns:xsi=" 01/XMLSchema-instance" xmlns:aop=" 3. xmlns:tx=" xmlns:p=" springframework.org/schema/p" xmlns:util=" ema/util" xmlns:jdbc=" 4. xmlns:cache=" 5. xsi:schemalocation="  21. <bean id="datasource" class="com.alibaba.druid.pool.druiddatasource" ini t-method="init" destroy-method="close"> 22.  23. <property name="url" value="${jdbc.url}" /> 24. <property name="username" value="${jdbc.username}" /> 25. <property name="password" value="${jdbc.password}" /> 47

48 26.  27. <property name="initialsize" value="1" /> 28. <property name="minidle" value="1" /> 29. <property name="maxactive" value="20" /> 30.  31. <property name="maxwait" value="60000" /> 32.  33. <property name="timebetweenevictionrunsmillis" value="60000" /> 34.  35. <property name="minevictableidletimemillis" value="300000" /> 36. <property name="validationquery" value="select 'x'" /> 37. <property name="testwhileidle" value="true" /> 38. <property name="testonborrow" value="false" /> 39. <property name="testonreturn" value="false" /> 40.  41. <property name="poolpreparedstatements" value="false" /> 42. <property name="maxpoolpreparedstatementperconnectionsize" value="20 " /> 43.  44. <property name="filters" value="stat" /> 45. </bean> 46.  47. <bean id="sqlsessionfactory" class="org.mybatis.spring.sqlsessionfactory Bean" p:datasource-ref="datasource" p:configlocation="classpath:mybatis-conf ig.xml" p:mapperlocations="classpath:com/eduoinfo/finances/bank/web/dao/*.xm l" /> 48.  49. <bean class="org.mybatis.spring.mapper.mapperscannerconfigurer" p:basepa ckage="com.eduoinfo.finances.bank.web.dao" p:sqlsessionfactorybeanname="sqls essionfactory" /> 50.  51. <bean id="transactionmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager" p:datasource-ref="datasource" /> 52.  53. <aop:aspectj-autoproxy proxy-target-class="true" /> 54.  55. <tx:annotation-driven transaction-manager="transactionmanager" /> 56.  57. <cache:annotation-driven cache-manager="cachemanager" /> 58. <bean id="ehcachemanagerfactory" class="org.springframework.cache.ehcach e.ehcachemanagerfactorybean" p:configlocation="classpath:ehcache.xml" /> 59. <bean id="cachemanager" class="org.springframework.cache.ehcache.ehcache CacheManager" p:cachemanager-ref="ehcachemanagerfactory" /> 48

49 60. </beans> 运行结果 (init_webapp): 实验七 : 文件上传下载 1. 断点下载 ( 续传 ) 工程目录 : 49

50 SERVLET 类 : 1. import java.io.file; 2. import java.io.fileinputstream; 3. import java.io.ioexception; 4. import java.io.inputstream; 5. import java.io.outputstream; 6. import javax.servlet.servletexception; 7. import javax.servlet.http.httpservlet; 8. import javax.servlet.http.httpservletrequest; 9. import javax.servlet.http.httpservletresponse; 10. public class downloadtest1 extends HttpServlet { 11. protected void doget(httpservletrequest req, HttpServletResponse resp) 12. throws ServletException, IOException { 13. // TODO Auto-generated method stub 14. dopost(req, resp); 15. } 16. protected void dopost(httpservletrequest req, HttpServletResponse resp) 17. throws ServletException, IOException { 18. // TODO Auto-generated method stub 19. // 被下载文件路径名称 20. String path = "D:\\",fileName="1.txt"; 21. File file = new File(path+fileName); 22. InputStream in = new FileInputStream(file); 23. OutputStream os= resp.getoutputstream(); 24. // 清空 response 缓存中数据, 仅保留状态码及 Header 25. resp.reset(); 26. byte [] buffer = new byte [128]; 27. long downloaded=0; 28. String range = req.getheader("range"); 29. if(range!= null){ 30. downloaded = Long.parseLong(range.split("-")[0].split("=")[1]) ; 31. // 设置 206 状态表示可以断点下载 32. resp.setstatus(206); 33. // 设置下载的范围 34. resp.setheader("content-range","bytes "+downloaded+"-"+file.le ngth()+"/"+file.length()); 35. } 36. resp.setcontenttype("application/octet-stream"); 37. // 文件名 38. resp.addheader("content-disposition", "attachment; filename="+new String(fileName.getBytes())); 50

51 39. // 文件大小 40. resp.addheader("content-length", file.length() + ""); 41. // 接受范围 bytes 42. resp.setheader("accept-ranges", "bytes"); 43. int len = 0; 44. while ((len=in.read(buffer))!=-1){ 45. os.write(buffer,0,len); 46. } 47. in.close(); 48. os.flush(); 49. os.close(); 50. } 51. } WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>login</servlet-name> 13. <servlet-class>showmsgservlet1</servlet-class> 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>login</servlet-name> 17. <url-pattern>/</url-pattern> 18. </servlet-mapping> 19. <servlet> 20. <servlet-name>test</servlet-name> 21. <servlet-class>downloadtest1</servlet-class> 22. </servlet> 23. <servlet-mapping> 24. <servlet-name>test</servlet-name> 25. <url-pattern>/test</url-pattern> 26. </servlet-mapping> 27. </web-app> 51

52 项目部署 : 1. 启动 2. 下载 3. 临时目录 4. 转存 52

2. 文件上传工程目录 : UPLOADSERVLET 1. import java.io.file; 2. import java.io.fileoutputstream; 3. import java.io.ioexception; 4. import java.io.inputstream; 5. import javax.servlet.servletexception; 6.

53 2. 文件上传工程目录 : UPLOADSERVLET 1. import java.io.file; 2. import java.io.fileoutputstream; 3. import java.io.ioexception; 4. import java.io.inputstream; 5. import javax.servlet.servletexception; 6. import javax.servlet.http.httpservlet; 7. import javax.servlet.http.httpservletrequest; 8. import javax.servlet.http.httpservletresponse; 9. import java.io.ioexception; 10. import java.io.printwriter; 11. import javax.servlet.servletexception; 12. import javax.servlet.http.httpservlet; 13. import javax.servlet.http.httpservletrequest; 14. import javax.servlet.http.httpservletresponse; 15. import javax.servlet.*; 16. import javax.servlet.http.*; 17. import java.io.*; 18. import java.util.*; 19. import java.io.datainputstream; 20. import java.io.fileoutputstream; 21. import java.io.ioexception; 22. import javax.servlet.servletexception; 23. import javax.servlet.http.httpservlet; 24. import javax.servlet.http.httpservletrequest; 25. import javax.servlet.http.httpservletresponse; 53

54 = "UploadServlet", urlpatterns = {"/UploadServlet"}) 27. public class UploadServlet extends HttpServlet { 28. protected void processrequest(httpservletrequest request, HttpServletRes ponse response) 29. throws ServletException, IOException { 30. response.setcontenttype("text/html;charset=utf-8"); 31. // 读取请求 Body 32. byte[] body = readbody(request); 33. // 取得所有 Body 内容的字符串表示 34. String textbody = new String(body, "UTF-8"); 35. // 取得上传的文件名称 36. String filename = getfilename(textbody); 37. // 取得文件开始与结束位置 38. Position p = getfileposition(request, textbody); 39. // 输出至文件 40. writeto(filename, body, p); 41. } 42. // 构造类 43. class Position { 44. int begin; 45. int end; 46. public Position(int begin, int end) { 47. this.begin = begin; 48. this.end = end; 49. } 50. } 51. private byte[] readbody(httpservletrequest request) throws IOException { 52. // 获取请求文本字节长度 53. int formdatalength = request.getcontentlength(); 54. // 取得 ServletInputStream 输入流对象 55. DataInputStream datastream = new DataInputStream(request.getInputStr eam()); 56. byte body[] = new byte[formdatalength]; 57. int totalbytes = 0; 58. while (totalbytes < formdatalength) { 59. int bytes = datastream.read(body, totalbytes, formdatalength); 60. totalbytes += bytes; 61. } 62. return body; 63. } 64. private Position getfileposition(httpservletrequest request, String text Body) throws IOException { 65. // 取得文件区段边界信息 54

55 66. String contenttype = request.getcontenttype(); 67. String boundarytext = contenttype.substring(contenttype.lastindexof( "=") + 1, contenttype.length()); 68. // 取得实际上传文件的起始与结束位置 69. int pos = textbody.indexof("filename=\""); 70. pos = textbody.indexof("\n", pos) + 1; 71. pos = textbody.indexof("\n", pos) + 1; 72. pos = textbody.indexof("\n", pos) + 1; 73. int boundaryloc = textbody.indexof(boundarytext, pos) - 4; 74. int begin = ((textbody.substring(0, pos)).getbytes("iso ")).le ngth; 75. int end = ((textbody.substring(0, boundaryloc)).getbytes("iso ")).length; 76. return new Position(begin, end); 77. } 78. private String getfilename(string requestbody) { 79. String filename = requestbody.substring(requestbody.indexof("filenam e=\"") + 10); 80. filename = filename.substring(0, filename.indexof("\n")); 81. filename = filename.substring(filename.indexof("\n") + 1, filename.i ndexof("\"")); 82. return filename; 83. } 84. private void writeto(string filename, byte[] body, Position p) throws IO Exception { 85. FileOutputStream fileoutputstream = new FileOutputStream("d:/" + fil ename); 86. fileoutputstream.write(body, p.begin, (p.end - p.begin)); 87. fileoutputstream.flush(); 88. fileoutputstream.close(); 89. } 90. // <editor-fold defaultstate="collapsed" desc="httpservlet methods. Clic k on the + sign on the left to edit the code."> 92. protected void doget(httpservletrequest request, HttpServletResponse res ponse) 93. throws ServletException, IOException { 94. processrequest(request, response); 95. } 97. protected void dopost(httpservletrequest request, HttpServletResponse re sponse) 98. throws ServletException, IOException { 99. processrequest(request, response); 55

56 100. } 102. public String getservletinfo() { 103. return "Short description"; 104. }// </editor-fold> 105. } WEBSERVLET 1. WebServlet { 2. String[] name(); 3. String[] urlpatterns(); 4. } UPLOAD.JSP 1. <%@ page language="java" import="java.util.*" pageencoding="utf-8"%> 2. <% 3. String path = request.getcontextpath(); 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'upload.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 21. <form action="uploadservlet" method="post" enctype="multipart/form-data" > 22. <input type="file" name="file"> 23. <input type="submit" name="upload"value=" 上传 "> 24. </form> 25. </body> 26. </html> 56

57 WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>login</servlet-name> 13. <servlet-class>showmsgservlet1</servlet-class> 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>login</servlet-name> 17. <url-pattern>/</url-pattern> 18. </servlet-mapping> 19. <servlet> 20. <servlet-name>test</servlet-name> 21. <servlet-class>downloadtest1</servlet-class> 22. </servlet> 23. <servlet-mapping> 24. <servlet-name>test</servlet-name> 25. <url-pattern>/test</url-pattern> 26. </servlet-mapping> 27. <servlet> 28. <servlet-name>upload</servlet-name> 29. <servlet-class>uploadservlet</servlet-class> 30. </servlet> 31. <servlet-mapping> 32. <servlet-name>upload</servlet-name> 33. <url-pattern>/*</url-pattern> 34. </servlet-mapping> 35. </web-app> 运行结果 : 1. 启动 57

58 2. 选择文件 3. 上传 4. 保存目录进入断点调试模式后, 报错 formdatalength=-1( 负长度数组错误 ) 修改方案 : 修改 UploadServlet 为临时存放 - 保存目录形式, 用缓存取代线程 58

导入 JAR 包及 CAPABILITY: UPLOADSERVLET 1. import java.io.bufferedinputstream; 2. import java.io.bufferedoutputstream; 3. import java.io.file; 4. import java.io.fileoutputstream; 5. import java.io.ioexception; 6.

59 导入 JAR 包及 CAPABILITY: UPLOADSERVLET 1. import java.io.bufferedinputstream; 2. import java.io.bufferedoutputstream; 3. import java.io.file; 4. import java.io.fileoutputstream; 5. import java.io.ioexception; 6. import javax.servlet.servletexception; 7. import javax.servlet.http.httpservletrequest; 8. import javax.servlet.http.httpservletresponse; 9. import org.apache.commons.fileupload.defaultfileitemfactory; 10. import org.apache.commons.fileupload.fileitemfactory; 11. import org.apache.commons.fileupload.fileitemiterator; 12. import org.apache.commons.fileupload.fileitemstream; 13. import org.apache.commons.fileupload.disk.diskfileitemfactory; 14. import org.apache.commons.fileupload.servlet.servletfileupload; 15. import org.apache.commons.fileupload.util.streams; 16. /** 17. * 18. Servlet implementation class for Servlet: UploadServlet 19. * 20. */ 21. public class UploadServlet extends javax.servlet.http.httpservlet implements javax.servlet.servlet { 22. File tmpdir = null;// 初始化上传文件的临时存放目录 23. File savedir = null;// 初始化上传文件后的保存目录 24. public UploadServlet() { 25. super(); 26. } 59

60 27. protected void doget(httpservletrequest request, HttpServletResponse respons e) throws ServletException, IOException { 28. dopost(request,response); 29. } 30. protected void dopost(httpservletrequest request, HttpServletResponse respon se) throws ServletException, IOException { 31. try{ 32. if(servletfileupload.ismultipartcontent(request)){ 33. DiskFileItemFactory dff = new DiskFileItemFactory();// 创建该对象 34. dff.setrepository(tmpdir);// 指定上传文件的临时目录 35. dff.setsizethreshold( );// 指定在内存中缓存数据大小, 单位为 byte 36. ServletFileUpload sfu = new ServletFileUpload(dff);// 创建该对象 37. sfu.setfilesizemax( );// 指定单个上传文件的最大尺寸 38. sfu.setsizemax( );// 指定一次上传多个文件的总尺寸 39. FileItemIterator fii = sfu.getitemiterator(request);// 解析 request 请求, 并返回 FileItemIterator 集合 40. while(fii.hasnext()){ 41. FileItemStream fis = fii.next();// 从集合中获得一个文件流 42. if(!fis.isformfield() && fis.getname().length()>0){// 过滤掉表单中非文件域 43. String filename = fis.getname().substring(fis.getname().lastindexof(""));// 获得上传文件的文件名 44. BufferedInputStream in = new BufferedInputStream(fis.openStream());// 获得文件输入流 45. BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(saveDir+fileName)));// 获得文件输出流 46. Streams.copy(in, out, true);// 开始把文件写到你指定的上传文件夹 47. } 48. } 49. response.getwriter().println("file upload successfully!!!");// 终于成功了, 还不到你的上传文件中看看, 你要的东西都到齐了吗 50. } 51. }catch(exception e){ 52. e.printstacktrace(); 53. } 54. } 55. public void init() throws ServletException { 56. /* 对上传文件夹和临时文件夹进行初始化 57. * 58. */ 59. super.init(); 60. String tmppath = "c:/tmpdir"; 61. String savepath = "c:/updir"; 62. tmpdir = new File("c:/tmpdir/1.txt"); 63. savedir = new File("c:/updir/1.txt"); 60

61 64. if(!tmpdir.isdirectory()) 65. tmpdir.mkdir(); 66. if(!savedir.isdirectory()) 67. savedir.mkdir(); 68. } 69. } 配置文件 : 1. WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>upload</servlet-name> 13. <servlet-class>uploadservlet</servlet-class> 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>upload</servlet-name> 17. <url-pattern>/*</url-pattern> 18. </servlet-mapping> 19. </web-app> 2. 导入 STRUTS-CONFIG.XML( 与权限验证类似 ) 1. <?xml version="1.0" encoding="utf-8"?> 2. <!DOCTYPE struts PUBLIC 3. "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4. " 5. <struts> 6. <constant name="struts.devmode" value="true" /> 7. <package name="default" namespace="" extends="struts-default"> 8.  9. <interceptors> 10.  11. <interceptor name="authenticationinterceptor" class="interceptor.a uthinterceptor" /> 61

62 12. <interceptor-stack name="defualtsecuritystackwithauthentication"> 13. <interceptor-ref name="defaultstack" /> 14. <interceptor-ref name="authenticationinterceptor" /> 15. </interceptor-stack> 16. </interceptors> 17.  18. <global-results> 19. <result name="index">/index.jsp</result> 20. <result name="login">/login.jsp</result> 21. </global-results> 22. <action name="login" class="action.loginaction"> 23. <param name="withoutauthentication">true</param> 24. <result name="success">/index.jsp</result> 25. <result name="input">/login.jsp</result> 26. </action> 27. </package> 28. </struts> 运行结果 : 1. 上传 2. 临时存放 62

63 3. 保存目录实验八 :SERVLET 多线程工程目录 : SERVLET 测试类 : 1. import java.util.hashmap; 2. import java.util.map; 3. import javax.servlet.servlet; 4. public class servlet { 5. private static servlet instance=new servlet(); 6. private servlet(){ 7. } 63

8. public static servlet getinstance(){ 9. return instance; 10. } 11. public void services(){ 12. System.out.println("do something"); 13. } 14. static class Client extends Thread{ 15.

64 8. public static servlet getinstance(){ 9. return instance; 10. } 11. public void services(){ 12. System.out.println("do something"); 13. } 14. static class Client extends Thread{ 15. private servlet servlet; 16. public Client(servlet servlet){ 17. this.servlet=servlet; 18. } 19. public void run(){ 20. ((servlet) servlet).services(); 21. System.out.println("do something"); 22. } 23. } 24. public static void main(string[] args){ 25. servlet servlet=new servlet(); 26. servlet.getinstance(); 27. for(int i=0;i<10;i++){ 28. Client client=new Client(servlet); 29. client.start(); 30. } 31. } 32. } 运行结果 : 分别执行 doget() 与 dopost() 方法, 控制台输出 10*2=20 例线程 64

import javax.servlet.servletexception; 4. import javax.servlet.http.

65 实验九 :DEMO 服务 1. AJAX 脚本工程目录 : LIBRARY 与 CAPABILITY( 导入 cxf.jar): SERVLET 类 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import javax.servlet.servletexception; 4. import javax.servlet.http.httpservlet; 5. import javax.servlet.http.httpservletrequest; 65

66 6. import javax.servlet.http.httpservletresponse; 7. import org.springframework.context.applicationcontext; 8. import org.springframework.context.support.filesystemxmlapplicationcontext; 9. public class controller extends HttpServlet { 10. protected void processrequest(httpservletrequest request, 11. HttpServletResponse response, String method) 12. throws ServletException, IOException {// 自定义的一个方法, 因为 get 与 post 都要用到参数跟 dopost\doget 差不多, 抛出的异常也差不多 13. //Set content type of the response to text/xml 14. //response.setcontenttype("application/json"); 15. response.setcontenttype("text/html"); 16. //Get the user's input 17. String firstname = request.getparameter("firstname"); 18. String middlename = request.getparameter("middlename"); 19. String birthday = request.getparameter("birthday"); 20. //Create the response text 21. String responsetext = "Hello " + firstname + " " + middlename ". Your birthday is " + birthday + "." " [Method: " + method + "]"; 24. //Write the response back to the browser 25. PrintWriter out = response.getwriter(); 26. out.println(responsetext); 27. //Close the writer 28. out.close(); 29. } 30. protected void doget(httpservletrequest request, HttpServletResponse response) 31. throws ServletException, IOException { 32. //Process the request in method processrequest 33. processrequest(request, response, "GET"); 34. } 35. protected void dopost(httpservletrequest request, HttpServletRespons e response) 36. throws ServletException, IOException { 37. //Process the request in method processrequest 38. processrequest(request, response, "POST"); 39. } 40. } JSP: 1. AJAX.JSP 66

67 1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " 3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2. <html xmlns=" 3. <head> 4. <title>sending Request Data Using GET and POST</title> 5. <script type="text/javascript"> 6. var xmlhttp; 7. function createxmlhttprequest() {// 创建 xmlhttprequest 对象 8. if (window.activexobject) { 9. xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 10. } 11. else if (window.xmlhttprequest) { 12. xmlhttp = new XMLHttpRequest(); 13. } 14. } 15. function createquerystring() {// 创建查询串 16. var firstname = document.getelementbyid("firstname").value; 17. var middlename = document.getelementbyid("middlename").value; 18. var birthday = document.getelementbyid("birthday").value; 19. var querystring = "firstname=" + firstname + "&middlename=" + middlename "&birthday=" + birthday; 21. return querystring; 22. } 23. function dorequestusingget() {//Get 的主 js 24. createxmlhttprequest(); 25. var querystring = "GetAndPostExample?"; 26. querystring = querystring + createquerystring() "&timestamp=" + new Date().getTime(); 28. xmlhttp.onreadystatechange = handlestatechange; 29. xmlhttp.open("get", querystring, true); 30. xmlhttp.send(null); 31. } 32. function dorequestusingpost() {//POST 的主 js 33. createxmlhttprequest(); 34. var url = "GetAndPostExample?timeStamp=" + new Date().getTime(); 35. var querystring = createquerystring(); 36. xmlhttp.open("post", url, true); 37. xmlhttp.onreadystatechange = handlestatechange; 38. xmlhttp.setrequestheader("content-type", "application/x-www-form-urlenco ded"); // 这句话不能去, 否则得不到数据确保服务器知道请求体中有参数 39. xmlhttp.send(querystring); 40. } 41. function handlestatechange() { 67

68 42. if(xmlhttp.readystate == 4) { 43. if(xmlhttp.status == 200) { 44. parseresults(); 45. } 46. } 47. } 48. function parseresults() { 49. var responsediv = document.getelementbyid("serverresponse"); 50. if(responsediv.haschildnodes()) { 51. responsediv.removechild(responsediv.childnodes[0]); 52. } 53. var responsetext = document.createtextnode(xmlhttp.responsetext); 54. responsediv.appendchild(responsetext); 55. } 56. </script> 57. </head> 58. <body> 59. <h1>enter your first name, middle name, and birthday:</h1> 60. <table> 61. <tbody> 62. <tr> 63. <td>first name:</td> 64. <td><input type="text" id="firstname"/> 65. </tr> 66. <tr> 67. <td>middle name:</td> 68. <td><input type="text" id="middlename"/> 69. </tr> 70. <tr> 71. <td>birthday:</td> 72. <td><input type="text" id="birthday"/> 73. </tr> 74. </tbody> 75. </table> 76. <form action="#"> 77. <input type="button" value="send parameters using GET" onclick="doreques tusingget();"/> 78. <br/><br/> 79. <input type="button" value="send parameters using POST" onclick="doreque stusingpost();"/> 80. </form> <br/> 81. <h2>server Response:</h2> 82. <div id="serverresponse"></div> 83. </body> 68

69 84. </html> 2. INDEX.JSP 1. page language="java" import="java.util.*" pageencoding="utf-8"%> 2. <% 3. String path = request.getcontextpath(); 4. String basepath = request.getscheme()+"://"+request.getservername()+":"+requ est.getserverport()+path+"/"; 5. %> 6. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7. <html> 8. <head> 9. <base href="<%=basepath%>"> 10. <title>my JSP 'index.jsp' starting page</title> 11. <meta http-equiv="pragma" content="no-cache"> 12. <meta http-equiv="cache-control" content="no-cache"> 13. <meta http-equiv="expires" content="0"> 14. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15. <meta http-equiv="description" content="this is my page"> 16. <! <link rel="stylesheet" type="text/css" href="styles.css"> > 19. </head> 20. <body> 21. <h1>helloworld</h1> 22. </body> 23. </html> 运行结果 (GET/POST): 69

70 2. CXF 兼容性 SERVLET 类 bean 与 servlet 共存, 分别通过 cxf-extension-soap 与 cxf-servlet 实现映射 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import java.util.hashmap; 4. import javax.servlet.servletexception; 5. import javax.servlet.http.httpservlet; 6. import javax.servlet.http.httpservletrequest; 7. import javax.servlet.http.httpservletresponse; 8. import org.springframework.context.applicationcontext; 9. import org.springframework.context.support.filesystemxmlapplicationcontext; 10. import com.sun.xml.xsom.impl.scd.iterators.map; 11. public class controller extends HttpServlet { 12. protected void processrequest(httpservletrequest request, 13. HttpServletResponse response, String method) 14. throws ServletException, IOException {// 自定义的一个方法, 因为 get 与 post 都要用到参数跟 dopost\doget 差不多, 抛出的异常也差不多 15. ApplicationContext ctx =new FileSystemXmlApplicationContext("C:\ \Documents and Settings\\Administrator\\Workspaces\\MyEclipse 10\\servletdem o\\webroot\\web-inf\\applicationcontext.xml"); 16. client client = (client)ctx.getbean("client"); 17. //Set content type of the response to text/xml 18. response.setcontenttype("application/json"); 19. //response.setcontenttype("text/html"); 20. //Get the user's input 21. String firstname = request.getparameter("firstname"); 22. String middlename = request.getparameter("middlename"); 23. String birthday = request.getparameter("birthday"); 24. client.setfirstname(request.getparameter("firstname")); 25. client.setmiddlename(request.getparameter("middlename")); 26. client.setbirthday(request.getparameter("birthday")); 27. //Create the response text 28. String responsetext = "Hello " + firstname + " " + middlename ". Your birthday is " + birthday + "." " [Method: " + method + "]"; 31. //Write the response back to the browser 32. PrintWriter out = response.getwriter(); 33. out.println(responsetext); 34. //Close the writer 70

71 35. out.close(); 36. } 37. protected void doget(httpservletrequest request, HttpServletResponse response) 38. throws ServletException, IOException { 39. //Process the request in method processrequest 40. processrequest(request, response, "GET"); 41. } 42. protected void dopost(httpservletrequest request, HttpServletRespons e response) 43. throws ServletException, IOException { 44. //Process the request in method processrequest 45. processrequest(request, response, "POST"); 46. } 47. } 客户类 1. public class client { 2. private String firstname; 3. private String middlename; 4. private String birthday; 5. public String getfirstname() { 6. return firstname; 7. } 8. public void setfirstname(string firstname) { 9. this.firstname = firstname; 10. } 11. public String getmiddlename() { 12. return middlename; 13. } 14. public void setmiddlename(string middlename) { 15. this.middlename = middlename; 16. } 17. public String getbirthday() { 18. return birthday; 19. } 20. public void setbirthday(string birthday) { 21. this.birthday = birthday; 22. } 23. } 配置文件 : 1. WEB.XML 71

72 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app xmlns:xsi=" xmlns=" /java.sun.com/xml/ns/javaee" xmlns:web=" b-app_2_5.xsd" xsi:schemalocation=" java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5" id="webapp_ "> 3. <welcome-file-list> 4. <welcome-file>index.html</welcome-file> 5. <welcome-file>index.htm</welcome-file> 6. </welcome-file-list> 7. <context-param> 8. <param-name>contextconfiglocation</param-name> 9. <param-value>/web-inf/applicationcontext.xml</param-value> 10. </context-param> 11. <listener> 12. <listener-class> 13. org.springframework.web.context.contextloaderlistener 14. </listener-class> 15. </listener> 16. <servlet> 17. <servlet-name>cxfservlet</servlet-name> 18. <servlet-class>controller</servlet-class> 19. </servlet> 20. <servlet-mapping> 21. <servlet-name>cxfservlet</servlet-name> 22. <url-pattern>/test</url-pattern> 23. </servlet-mapping> 24. <servlet> 25. <servlet-name>test</servlet-name> 26. <servlet-class>controller</servlet-class> 27. </servlet> 28. <servlet-mapping> 29. <servlet-name>test</servlet-name> 30. <url-pattern>/</url-pattern> 31. </servlet-mapping> 32. </web-app> 2. APPLICATIONCONTEXT.XML 调用 ajax 并删除 cxf.xml 头文件 1. <?xml version="1.0" encoding="utf-8"?> 72

73 2. <beans xmlns=" 3. xmlns:xsi=" 4. xmlns:http-conf=" " 5. xmlns:jaxws=" 6. xsi:schemalocation="  13. <import resource="classpath:meta-inf/cxf/cxf-extension-soap.xml"/> 14. <import resource="classpath:meta-inf/cxf/cxf-servlet.xml"/> 15. <bean id="client" class="client"> 16. </bean> 17. </beans> 3. CXF.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <!-- 3. Licensed to the Apache Software Foundation (ASF) under one 4. or more contributor license agreements. See the NOTICE file 5. distributed with this work for additional information 6. regarding copyright ownership. The ASF licenses this file 7. to you under the Apache License, Version 2.0 (the 8. "License"); you may not use this file except in compliance 9. with the License. You may obtain a copy of the License at Unless required by applicable law or agreed to in writing, 12. software distributed under the License is distributed on an 13. "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 14. KIND, either express or implied. See the License for the 15. specific language governing permissions and limitations 16. under the License > 18. <beans xmlns=" xmlns:xsi=" / xmlns:http=" ports/http/configuration" xmlns:jaxws=" xsi:sche malocation=" s/jaxws.xsd pache.org/schemas/configuration/http-conf.xsd 73

/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> 19. <http:conduit name="{http://cxf.apache.

74 /schema/beans < name="{ onport.http-conduit"> 20. < ConnectionTimeout=" " ReceiveTimeout=" "/> 21. </ 22. </beans> 项目部署 : 1. 启动 2. 运行 3. 头文件 74

1. 获得连接 1. import java.io.ioexception; 2. import java.io.printwriter; 3.

75 若 jar 包冲突, 重新导入 spring(3.0)core.library; 如果出现端口跳转, 则干掉 javaw 进程实验十 : 数据连接池工程目录与 JAR 包 : ORACLE 界面 : 1. 获得连接 1. import java.io.ioexception; 2. import java.io.printwriter; 3. import java.sql.connection; 4. import java.util.linkedlist; 5. import javax.servlet.servletexception; 75

76 6. import javax.servlet.http.httpservlet; 7. import javax.servlet.http.httpservletrequest; 8. import javax.servlet.http.httpservletresponse; 9. public class getconnection extends HttpServlet { 10. private static final long serialversionuid = L; 11. private static final Connection conn = null; 12. public void doget(httpservletrequest request, HttpServletResponse respon se)throws ServletException, IOException { 13. dopost(request,response); 14. } 15. public void dopost(httpservletrequest request, HttpServletResponse respo nse)throws ServletException, IOException { 16. PrintWriter out = response.getwriter(); 17. try{ 18. Connection conn = new JDBC_POOL().getConnection(); 19. out.print(conn+" : " + conn.hashcode()); 20. }catch(exception e){ 21. System.out.println(e.getMessage()); 22. e.printstacktrace(); 23. }finally{ 24. } 25. } 26. public static void main(string[] args){ 27. HttpServlet getconnection=new getconnection(); 28. Object JDBC_POOL=new JDBC_POOL(); 29. Connection myconnection=new myconnection(conn); 30. System.out.println("connection created!"); 31. } 32. } 2. 连接池 1. import java.sql.connection; 2. import java.sql.drivermanager; 3. import java.util.arraylist; 4. import java.util.linkedlist; 5. import java.util.list; 6. public class JDBC_POOL { 7. private static final String URL = "jdbc:oracle:thin:@ :1521:ora9 "; 8. private static final String DRIVER = "oracle.jdbc.driver.oracledriver"; 9. private static final String USER_NAME = "pqrs008"; 10. private static final String PASSWORD = " "; 11. /** 76

77 12. * 用来装连接池的容器 13. */ 14. public static LinkedList<myConnection> list = new LinkedList<myConnectio n>(); 15. /** 16. * 设置容器的大小 17. */ 18. public static int size = 100; 19. static{ 20. try{ 21. for(int i=0;i<3;i++){ 22. Connection conn= DriverManager.getConnection(URL,USER_NAME, PASSWORD); 23. System.out.println(" 创建了数据库连接 : " + conn + " : " + conn.hashcode()); 24. myconnection mc = new myconnection(conn); 25. list.add(mc); 26. } 27. }catch(exception e){ 28. System.out.println(e.getMessage()); 29. e.printstacktrace(); 30. } 31. } 32. public myconnection getconnection()throws Exception{ 33. if(list.size()==0 list.size()<0){ 34. // 连接池已经满了 35. throw new Exception(" 连接池已经没有连接对象 "); 36. }else{ 37. System.out.println(" 程序获取连接对象 : " + list.get(0).getconnection()); 38. return list.removefirst(); 39. } 40. } 41. } 3. 事务处理 1. import java.sql.array; 2. import java.sql.blob; 3. import java.sql.callablestatement; 4. import java.sql.clob; 5. import java.sql.connection; 6. import java.sql.databasemetadata; 7. import java.sql.nclob; 8. import java.sql.preparedstatement; 77

78 9. import java.sql.sqlclientinfoexception; 10. import java.sql.sqlexception; 11. import java.sql.sqlwarning; 12. import java.sql.sqlxml; 13. import java.sql.savepoint; 14. import java.sql.statement; 15. import java.sql.struct; 16. import java.util.map; 17. import java.util.properties; 18. import java.util.concurrent.executor; 19. public class myconnection implements Connection{ 20. private Connection conn; 21. public myconnection(connection conn){ 22. this.conn = conn; 23. } 24. public <T> T unwrap(class<t> iface) throws SQLException { 25. // TODO Auto-generated method stub 26. return conn.unwrap(iface); 27. } 28. public boolean iswrapperfor(class<?> iface) throws SQLException { 29. // TODO Auto-generated method stub 30. return conn.iswrapperfor(iface); 31. } 32. public Statement createstatement() throws SQLException { 33. // TODO Auto-generated method stub 34. return conn.createstatement(); 35. } 36. public PreparedStatement preparestatement(string sql) throws SQLExceptio n { 37. // TODO Auto-generated method stub 38. return conn.preparestatement(sql); 39. } 40. public CallableStatement preparecall(string sql) throws SQLException { 41. // TODO Auto-generated method stub 42. return conn.preparecall(sql); 43. } 44. public String nativesql(string sql) throws SQLException { 45. // TODO Auto-generated method stub 46. return conn.nativesql(sql); 47. } 48. public void setautocommit(boolean autocommit) throws SQLException { 49. // TODO Auto-generated method stub 50. conn.setautocommit(autocommit); 51. } 78

79 52. public boolean getautocommit() throws SQLException { 53. // TODO Auto-generated method stub 54. return conn.getautocommit(); 55. } 56. public void commit() throws SQLException { 57. // TODO Auto-generated method stub 58. conn.commit(); 59. } 60. public void rollback() throws SQLException { 61. // TODO Auto-generated method stub 62. conn.rollback(); 63. } 64. public void close() throws SQLException { 65. // TODO Auto-generated method stub 66. // 在这里将连接对象还给连接池 67. System.out.println(" 将连接对象还给连接池 : " + conn); 68. JDBC_POOL.list.add(new myconnection(conn)); 69. } 70. public boolean isclosed() throws SQLException { 71. // TODO Auto-generated method stub 72. return conn.isclosed(); 73. } 74. public DatabaseMetaData getmetadata() throws SQLException { 75. // TODO Auto-generated method stub 76. return conn.getmetadata(); 77. } 78. public void setreadonly(boolean readonly) throws SQLException { 79. // TODO Auto-generated method stub 80. conn.setreadonly(readonly); 81. } 82. public boolean isreadonly() throws SQLException { 83. // TODO Auto-generated method stub 84. return conn.isreadonly(); 85. } 86. public void setcatalog(string catalog) throws SQLException { 87. // TODO Auto-generated method stub 88. conn.setcatalog(catalog); 89. } 90. public String getcatalog() throws SQLException { 91. // TODO Auto-generated method stub 92. return conn.getcatalog(); 93. } 94. public void settransactionisolation(int level) throws SQLException { 95. // TODO Auto-generated method stub 79

80 96. conn.settransactionisolation(level); 97. } 98. public int gettransactionisolation() throws SQLException { 99. // TODO Auto-generated method stub 100. return conn.gettransactionisolation(); 101. } 102. public SQLWarning getwarnings() throws SQLException { 103. // TODO Auto-generated method stub 104. return conn.getwarnings(); 105. } 106. public void clearwarnings() throws SQLException { 107. // TODO Auto-generated method stub 108. conn.clearwarnings(); 109. } 110. public Statement createstatement(int resultsettype, int resultsetconcur rency) 111. throws SQLException { 112. // TODO Auto-generated method stub 113. return conn.createstatement(resultsettype, resultsetconcurrency); 114. } 115. public PreparedStatement preparestatement(string sql, int resultsettype, 116. int resultsetconcurrency) throws SQLException { 117. // TODO Auto-generated method stub 118. return conn.preparestatement(sql, resultsettype,resultsetconcurrenc y); 119. } 120. public CallableStatement preparecall(string sql, int resultsettype, 121. int resultsetconcurrency) throws SQLException { 122. // TODO Auto-generated method stub 123. return conn.preparecall(sql, resultsettype, resultsetconcurrency, r esultsetconcurrency); 124. } 125. public Map<String, Class<?>> gettypemap() throws SQLException { 126. // TODO Auto-generated method stub 127. return conn.gettypemap(); 128. } 129. public void settypemap(map<string, Class<?>> map) throws SQLException { 130. // TODO Auto-generated method stub 131. conn.settypemap(map); 132. } 133. public void setholdability(int holdability) throws SQLException { 134. // TODO Auto-generated method stub 80

81 135. conn.setholdability(holdability); 136. } 137. public int getholdability() throws SQLException { 138. // TODO Auto-generated method stub 139. return conn.getholdability(); 140. } 141. public Savepoint setsavepoint() throws SQLException { 142. // TODO Auto-generated method stub 143. return conn.setsavepoint(); 144. } 145. public Savepoint setsavepoint(string name) throws SQLException { 146. // TODO Auto-generated method stub 147. return conn.setsavepoint(name); 148. } 149. public void rollback(savepoint savepoint) throws SQLException { 150. // TODO Auto-generated method stub 151. conn.rollback(savepoint); 152. } 153. public void releasesavepoint(savepoint savepoint) throws SQLException { 154. // TODO Auto-generated method stub 155. conn.releasesavepoint(savepoint); 156. } 157. public Statement createstatement(int resultsettype, 158. int resultsetconcurrency, int resultsetholdability) 159. throws SQLException { 160. // TODO Auto-generated method stub 161. return conn.createstatement(resultsettype, resultsetconcurrency, re sultsetholdability); 162. } 163. public PreparedStatement preparestatement(string sql, int resultsettyp e, 164. int resultsetconcurrency, int resultsetholdability) 165. throws SQLException { 166. // TODO Auto-generated method stub 167. return conn.preparestatement(sql, resultsettype, resultsetconcurren cy,resultsetholdability); 168. } 169. public CallableStatement preparecall(string sql, int resultsettype, 170. int resultsetconcurrency, int resultsetholdability) 171. throws SQLException { 172. // TODO Auto-generated method stub 173. return conn.preparecall( sql, resultsettype, 174. resultsetconcurrency, resultsetholdability); 81

82 175. } 176. public PreparedStatement preparestatement(string sql, int autogenerated Keys) 177. throws SQLException { 178. // TODO Auto-generated method stub 179. return conn.preparestatement( sql, autogeneratedkeys); 180. } 181. public PreparedStatement preparestatement(string sql, int[] columnindex es) 182. throws SQLException { 183. // TODO Auto-generated method stub 184. return conn.preparestatement( sql, columnindexes); 185. } 186. public PreparedStatement preparestatement(string sql, String[] columnna mes) 187. throws SQLException { 188. // TODO Auto-generated method stub 189. return conn.preparestatement( sql, columnnames); 190. } 191. public Clob createclob() throws SQLException { 192. // TODO Auto-generated method stub 193. return conn.createclob(); 194. } 195. public Blob createblob() throws SQLException { 196. // TODO Auto-generated method stub 197. return conn.createblob(); 198. } 199. public NClob createnclob() throws SQLException { 200. // TODO Auto-generated method stub 201. return conn.createnclob(); 202. } 203. public SQLXML createsqlxml() throws SQLException { 204. // TODO Auto-generated method stub 205. return conn.createsqlxml(); 206. } 207. public boolean isvalid(int timeout) throws SQLException { 208. // TODO Auto-generated method stub 209. return conn.isvalid(timeout); 210. } 211. public void setclientinfo(string name, String value) 212. throws SQLClientInfoException { 213. // TODO Auto-generated method stub 214. conn.setclientinfo(name, value); 215. } 82

83 216. public void setclientinfo(properties properties) 217. throws SQLClientInfoException { 218. // TODO Auto-generated method stub 219. conn.setclientinfo(properties); 220. } 221. public String getclientinfo(string name) throws SQLException { 222. // TODO Auto-generated method stub 223. return conn.getclientinfo(name); 224. } 225. public Properties getclientinfo() throws SQLException { 226. // TODO Auto-generated method stub 227. return conn.getclientinfo(); 228. } 229. public Array createarrayof(string typename, Object[] elements) 230. throws SQLException { 231. // TODO Auto-generated method stub 232. return conn.createarrayof(typename, elements); 233. } 234. public Struct createstruct(string typename, Object[] attributes) 235. throws SQLException { 236. // TODO Auto-generated method stub 237. return conn.createstruct(typename, attributes); 238. } 239. public Connection getconnection(){ 240. return this.conn; 241. } 242. public void setschema(string schema) throws SQLException { 243. // TODO Auto-generated method stub 244. } 245. public String getschema() throws SQLException { 246. // TODO Auto-generated method stub 247. return null; 248. } 249. public void abort(executor executor) throws SQLException { 250. // TODO Auto-generated method stub 251. } 252. public void setnetworktimeout(executor executor, int milliseconds) 253. throws SQLException { 254. // TODO Auto-generated method stub 255. } 256. public int getnetworktimeout() throws SQLException { 257. // TODO Auto-generated method stub 258. return 0; 259. } 83

260. } 运行结果 : 在测试类 getconnection 中添加 Object JDBC_POOL=new JDBC_POOL(), 建立三次连接 : 启动 tomcat-servlet, 关闭连接池 : 1. WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3.

84 260. } 运行结果 : 在测试类 getconnection 中添加 Object JDBC_POOL=new JDBC_POOL(), 建立三次连接 : 启动 tomcat-servlet, 关闭连接池 : 1. WEB.XML 1. <?xml version="1.0" encoding="utf-8"?> 2. <web-app version="2.5" 3. xmlns=" 4. xmlns:xsi=" 5. xsi:schemalocation=" <display-name></display-name> 8. <welcome-file-list> 9. <welcome-file>index.jsp</welcome-file> 10. </welcome-file-list> 11. <servlet> 12. <servlet-name>database</servlet-name> 13. <servlet-class>getconnection</servlet-class> 14. </servlet> 15. <servlet-mapping> 16. <servlet-name>database</servlet-name> 17. <url-pattern>/test</url-pattern> 18. </servlet-mapping> 84

19. </web-app> 2. 启动 3. 连接已满补充说明 : 本框架的公用 jar 包还包括 : spring-framework-4.0.

85 19. </web-app> 2. 启动 3. 连接已满补充说明 : 本框架的公用 jar 包还包括 : spring-framework release(lib),spring-web,httpclient,oracle-jdbc,commons-io, commons-pool,commons-beanutils,log4j 等 85

86 附录 1. 修改 tomcat 最大连接数 (server.xml) 2. 去除断点打开 SHOW_VIEW 对话框选择 BREAKPOINTS 点击 double 叉去掉所有断点 86

参考文献 [1] http://www.csdn.net/ [2] http://www.iteye.com/ [3] http://www.blog.51cto.com/ [4] http://www.cnblogs.

87 参考文献 [1] [2] [3] [4] [5] address : pqrs008@126.com 版权说明 : 本文中涉及代码多可从网上直接转载, 或通过参考本专业的编程书籍得到, 并没有任何不合情理的难度 87

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D getinitparameternames() 9 下列选项中, 属于 Servlet API 中提供的 request 对象的包装类的是 ( ) A HttpServletRequestWrapper B HttpServletRequest C HttpServ

D getinitparameternames() 9 下列选项中, 属于 Servlet API 中提供的 request 对象的包装类的是 ( ) A HttpServletRequestWrapper B HttpServletRequest C HttpServ 第四章 Filter( 过滤器 ) 样题 A 卷一选择题 ( 每小题 2 分, 共 20 分 ) 1 下面选项中, 用于实现初始化过滤器的方法是 ( ) A init(filterconfig filterconfig) B dofilter(servletrequest req,servletresponse resp,filterchain