1 package com.hill.temp;
2
3 import java.io.IOException;
4 import java.util.List;
5
6 import javax.servlet.ServletException;
7 import javax.servlet.http.HttpServlet;
8 import javax.servlet.http.HttpServletRequest;
9 import javax.servlet.http.HttpServletResponse;
10
11 public class TestServlet extends HttpServlet {
12
13 @Override
14 protected void service(HttpServletRequest req, HttpServletResponse res)
15 throws ServletException, IOException {
16 //取得表单数据
17 String username = req.getParameter("username");
18 UserManager usermanager = new UserManager();
19 List userList = usermanager.findUserByName(username);
20 req.setAttribute("userlist", userList);
21 //转向到c。jsp，取出List中的数据
22 req.getRequestDispatcher("/a/b/c/c.jsp").forward(req, res);
23 }
24
25 }
package com.hill.temp;
import java.util.ArrayList;
import java.util.List;
public class UserManager {
public List findUserByName(String name){
List userList = new ArrayList();
userList.add("数据一");
userList.add("数据二");
return userList;
}
}
b.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<p>
<a href="../a.jsp">a.jsp</a><br>
<a href="c/c.jsp">c.jsp</a><br>
<a href="../d/d.jsp">d.jsp</a><br>
<a href="../../e/e.jsp">e.jsp</a><br>
</body>
</html>
c.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
c.jsp
<p>
<%
List userList = (List)request.getAttribute("userlist");
out.println(userList);
%>
</body>
</html>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>TestServlet</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>com.hill.temp.TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/servlet/TestServlet</url-pattern>
</servlet-mapping>
</web-app>
index.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<h1>测试servlet</h1>
<hr>
<form action="servlet/TestServlet" method="post">
<input type="text" name="username"><br>
<input type="submit" value="查询"><br>
</form>
<a href="a/b/b.jsp">b.jsp</a><br>
</body>
</html>
时间： 2024-12-12 09:53:39