该部分将逻辑判断在UserBean中进行处理,而且不采用配置的方式去实现,为了区分开两种实现方法的不同,在这里将之前设置的内容只是备注掉,并不会删除,也方便之后将两种方式进行对比。
第一部分 LoginController
1 //LoginController这部分使用的注解的方法
2 //因为使用了注解的方法,所以在web.xml中login的acion需要设置为LoginController
3 //不然找不到用谁来处理login.jsp
4 /**
5 * Servlet implementation class LoginController
6 */
7 @WebServlet("/LoginController")
8 public class LoginController extends HttpServlet {
9 private static final long serialVersionUID = 1L;
10
11 /**
12 * @see HttpServlet#HttpServlet()
13 */
14 public LoginController() {
15 super();
16 // TODO Auto-generated constructor stub
17 }
18
19 /**
20 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
21 */
22 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
23 // TODO Auto-generated method stub
24 ServletContext servletContext = getServletContext();
25 //将请求转发到UserBean去进行处理
26 RequestDispatcher requestDispatcher = servletContext.getRequestDispatcher("/UserBean");
27 requestDispatcher.forward(request, response);
28 // String name = request.getParameter("name");
29 // System.out.println(name);
30 // String password = request.getParameter("password");
31
32 //if("ustc".equals(name)&&"oreo".equals(password))
33 // if(name.equals(password))
34 // {
35 // //System.out.println("123");
36 // requestDispatcher = servletContext.getRequestDispatcher("/login_success.jsp");
37 // }
38 // else
39 // {
40 // requestDispatcher = servletContext.getRequestDispatcher("/login_fail.jsp");
41 // }
42 //response.getWriter().append("Served at: ").append(request.getContextPath());
43 }
44
45 /**
46 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
47 */
48 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
49 // TODO Auto-generated method stub
50 doGet(request, response);
51 }
52
53 }
1 <?xml version="1.0" encoding="UTF-8"?>
2 <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_3_0.xsd" id="WebApp_ID" version="3.0">
3 <display-name>Controller</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
13 </web-app>
1 <%@ page language="java" contentType="text/html; charset=utf-8"
2 pageEncoding="utf-8"%>
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=ISO-8859-1">
7 <title>Insert title here</title>
8 </head>
9 <body>
10 <form action="LoginController" method="post">
11 <!-- <form action="action/a1" method="post"> -->
12
13 <label>账号:</label><input type="text" name="name"></br>
14 <label>密码:</label><input type="text" name="password"></br>
15 <input type="submit" value="登录">
16 </form>
17 </body>
18 </html>
login_success.jsp和login_fail.jsp的内容保持不变
具体的执行效果