第一個頁面，用戶表單界面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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=utf-8">
<title>Insert title here</title>
</head>
<body>
<h1>登陸界面</h1>
<form action="doServlet" method="post" name="regUser">
<table>
<tr>
<td>用戶名：</td>
<td><input type="text" name="username" /></td>
</tr>
<tr>
<td>密碼：</td>
<td><input type="password" name="password"/></td>
</tr>
<tr>
<td>我的愛好：</td>
<td><input type="text" name="favorite" /></td>
</tr>
<tr>
<td><input type="submit" value="提交"/></td>
</tr>
</table>
</form>
</body>
</html>Servlet處理程序
package MyServlet;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class doServlet
*/
@WebServlet("/doServlet")
public class doServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public doServlet() {
}
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username;
String password;
String favorite;
try{
username=request.getParameter("username");
password=request.getParameter("password");
favorite=request.getParameter("favorite");
//將表單中提交過來的值保存到Servlet中
Users u= new Users();
u.setFavorite(favorite);
u.setPassword(password);
u.setUsername(username);
//將信息保存到Session中
request.getSession().setAttribute("regUser", u);
//跳轉到處理界面
request.getRequestDispatcher("/doLogin.jsp").forward(request, response);
}catch(Exception ex){
ex.printStackTrace();
}
}
}第三個界面，顯示界面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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=utf-8">
<title>Insert title here</title>
</head>
<body>
<h1>用戶信息</h1>
<jsp:useBean id="regUser" class="MyServlet.Users" scope="session" ></jsp:useBean>
名字：<%=regUser.getUsername() %><br>
密碼：<%=regUser.getPassword() %><br>
愛好：<%=regUser.getFavorite() %><br>
</body>
</html>
