1.实体类
1 package com.zdsofe.work;
2
3 public class User {
4
5
6 public String userName;
7 public String password;
8
9 public User(String userName, String password) {
10
11 this.userName = userName;
12 this.password = password;
13 }
14 public String getUserName() {
15 return userName;
16 }
17 public void setUserName(String userName) {
18 this.userName = userName;
19 }
20 public String getPassword() {
21 return password;
22 }
23 public void setPassword(String password) {
24 this.password = password;
25 }
26 }
2.web.xml的配置
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>webProject4</display-name> 4 <filter> 5 <filter-name>code</filter-name> 6 <filter-class>com.zdsofe.work.UserFliter</filter-class> 7 </filter> 8 <filter-mapping> 9 <filter-name>code</filter-name> 10 <url-pattern>/pages/*</url-pattern> 11 </filter-mapping> 12 <welcome-file-list> 13 <welcome-file>index.html</welcome-file> 14 <welcome-file>index.htm</welcome-file> 15 <welcome-file>index.jsp</welcome-file> 16 <welcome-file>default.html</welcome-file> 17 <welcome-file>default.htm</welcome-file> 18 <welcome-file>default.jsp</welcome-file> 19 </welcome-file-list> 20 </web-app>
3.主页面
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=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 10 <body> 11 <form action="loginServlet"> 12 用户名：<input type="text" name="userName"/><br/> 13 密码：<input type="password" name="password"/><br/> 14 <button type="submit">登录</button> 15 </form> 16 </body> 17 </html>
4.登录成功页面
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=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <h1>欢迎您！！！</h1> 11 </body> 12 </html>
5.过滤器
1 package com.zdsofe.work;
2
3 import java.io.IOException;
4
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
14 import org.apache.commons.lang.StringUtils;
15
16
17
18 public class UserFliter implements Filter {
19
20 @Override
21 public void destroy() {
22 // TODO Auto-generated method stub
23
24 }
25
26 @Override
27 public void doFilter(ServletRequest arg0, ServletResponse arg1,
28 FilterChain arg2) throws IOException, ServletException {
29 /*//过滤器
30 HttpServletRequest request=(HttpServletRequest)arg0;
31 HttpServletResponse response=( HttpServletResponse)arg1;
32 request.setCharacterEncoding("utf-8");
33 response.setCharacterEncoding("utf-8");
34 response.setContentType("text/html charset=utf-8");
35 arg2.doFilter(arg0, arg1);*/
36
37 //权限验证过滤器
38 HttpServletRequest request=(HttpServletRequest)arg0;
39 HttpServletResponse response=( HttpServletResponse)arg1;
40 User user= (User)request.getSession().getAttribute("user");
41
42
43 if(null!=user)
44 {
45 String userName=user.getUserName();
46 if(StringUtils.isNotBlank(userName)&&userName.contains("admin"))
47 {
48 System.out.println("登录成功");
49 arg2.doFilter(request, response);
50 } else
51 {
52 response.sendRedirect(request.getContextPath()+"/login.jsp");
53 }
54 }else
55 {
56 response.sendRedirect(request.getContextPath()+"/login.jsp");
57 }
58
59 }
60
61 @Override
62 public void init(FilterConfig arg0) throws ServletException {
63
64 }
65
66 }
6.服务器
1 package com.zdsofe.work;
2
3 import java.io.IOException;
4
5 import javax.servlet.ServletException;
6 import javax.servlet.annotation.WebServlet;
7 import javax.servlet.http.HttpServlet;
8 import javax.servlet.http.HttpServletRequest;
9 import javax.servlet.http.HttpServletResponse;
10 import javax.servlet.http.HttpSession;
11
12
13
14 /**
15 * Servlet implementation class loginServlet
16 */
17 @WebServlet("/loginServlet")
18 public class loginServlet extends HttpServlet {
19 private static final long serialVersionUID = 1L;
20
21 /**
22 * @see HttpServlet#HttpServlet()
23 */
24 public loginServlet() {
25 super();
26 // TODO Auto-generated constructor stub
27 }
28
29 /**
30 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
31 */
32 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
33 /*String name=request.getParameter("userName");
34 response.getWriter().print(name);*/
35
36 //获取用户名
37 String userName=request.getParameter("userName");
38 //获取密码
39 String password=request.getParameter("password");
40 //创建用户对象
41 User user=new User(userName,password);
42 //创建session对象
43 HttpSession session=request.getSession(true);
44 session.setAttribute("user", user);
45 response.sendRedirect(request.getContextPath()+"/pages/login1.jsp");
46 }
47
48 /**
49 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
50 */
51 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
52 // TODO Auto-generated method stub
53 }
54
55 }
注意：主页面login.jsp直接在webcontent下，登陆成功页面在webcontent的子目录pages下，防止方法重定向死循环。
时间： 2024-10-05 01:16:44