servlet MVC

时间：2010-09-19 来源：kelin1314

下面给出了一个非常简单的模板：

第一步：准备索引页面和转向页面index.jsp，a.jsp

第二步：准备配置文件web.xml

第三步：准备servlet.jar(Tomcat中common目录有)和servlet测试类

1 <%@ page language="java" contentType="text/html; charset=GB18030"
2     pageEncoding="GB18030"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=GB18030">
7 <title>Insert title here</title>
8 </head>
9 <body>
10     <h1>测试Servlet</h1>
11     <hr>
12     
15     <form action="servlet/TestServlet" method="post">
16         <input type="text" name="username"><br>
17         <input type="submit" value="提交"><br>
18     </form>
19     <a href="a.jsp">a.jsp</a><br>
20 </body>
21 </html>

1 <%@ page language="java" contentType="text/html; charset=GB18030"
2     pageEncoding="GB18030"%>
3 <%@ page import="java.util.*" %>
4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
5 <html>
6 <head>
7 <meta http-equiv="Content-Type" content="text/html; charset=GB18030">
8 <title>Insert title here</title>
9 </head>
10 <body>
11 c.jsp
12 <p>
13     I am here!<br>
14     <%
15         String name = "inital";
16         name = (String)request.getAttribute("username");
17         out.println(name);
18     %>
19 </body>
20 </html>

1 <?xml version="1.0" encoding="UTF-8"?>
2 <web-app version="2.4"
3     xmlns="http://java.sun.com/xml/ns/j2ee"
4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
6     http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
7   <welcome-file-list>
8     <welcome-file>index.jsp</welcome-file>
9   </welcome-file-list>
10
11   <servlet>
12       <servlet-name>TestServlet</servlet-name>
13       <servlet-class>com.klein.servlet.TestServlet</servlet-class>
14   </servlet>
15
16   <servlet-mapping>
17       <servlet-name>TestServlet</servlet-name>
18       <url-pattern>/servlet/TestServlet</url-pattern>
19   </servlet-mapping>
20 </web-app>

1 package com.klein.servlet;

2
3 import java.io.IOException;
4
5 import javax.servlet.ServletException;
6 import javax.servlet.http.HttpServlet;
7 import javax.servlet.http.HttpServletRequest;
8 import javax.servlet.http.HttpServletResponse;
9
10 public class TestServlet extends HttpServlet {
11
12
13     @Override
14     protected void service(HttpServletRequest request, HttpServletResponse response)
15             throws ServletException, IOException {
16         String name = request.getParameter("username");
17
18         /*
19         request.getRequestDispatcher("另一个Servlet的请求url").forward(request, response);
20         response.sendRedirect("另一个Servlet的请求url");
21         */
22         request.setAttribute("username", name);
23         request.getRequestDispatcher("../a.jsp").forward(request, response);
24     }
25 }