Servlet 程序:
- package com.westos.untitle2;
- import com.westos.untitle2.CityService.UserService;
- import com.westos.untitle2.bean.User;
- import javax.servlet.ServletException;
- import javax.servlet.annotation.webServlet;
- import javax.servlet.http.Cookie;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import java.io.IOException;
- import java.util.List;
- @WebServlet(name = "Cookie4Servlet")
- public class Cookie4Servlet extends HttpServlet {
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- doGet(request,response);
- }
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- response.setCharacterEncoding("utf-8");
- request.setCharacterEncoding("utf-8");
- response.setContentType("text/html;charset=utf-8");
- String username=request.getParameter("username");
- String password=request.getParameter("password");
- UserService userService=new UserService();
- List<User> list=userService.setUser();
- if (username==null||password==null){
- Cookie[] cookie=request.getCookies();
- for (Cookie c:cookie){
- if(c.getName().equals("username")){
- username=c.getValue();
- }else if(c.getName().equals("password")){
- password=c.getValue();
- }
- }
- }
- if(username.equals("")||password.equals("")){
- request.getRequestDispatcher("login2.html").forward(request,response);
- }else{
- for(User user:list){
- if(user.getUsername().equals(username)&&user.getPassword().equals(password)){
- Cookie cookie1=new Cookie("username",username);
- Cookie cookie2=new Cookie("password",password);
- cookie1.setMaxAge(60*60);
- cookie2.setMaxAge(60*60);
- response.addCookie(cookie1);
- response.addCookie(cookie2);
- request.getRequestDispatcher("success.html").forward(request,response);
- }else{
- request.getRequestDispatcher("login2.html").forward(request,response);
- }
- }
- }
- }
- }
登录页面程序:
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title> 登录 </title>
- </head>
- <body>
- <form action="./cookie4" method="Post" name="login">
- 昵称:<input name="username" type="text" placeholder="请输入昵称" id="nicheng"/><br/><br/>
- 密码:<input name="password" type="password" placeholder="请输入密码" id="mima"/><br/><br/>
- 请输入验证码:<br/>
- <img src="./yzm01" height="32" id="myyzm">
- <button type="button" value="看不清楚, 再来一张" onclick="identifyload()"> 看不清楚, 再来一张 </button>
- <input name="yzm01" type="text"/><br/>
- <button type="submit" value="登录"> 登录 </button>
- <button type="reset" value="重置"> 重置 </button>
- </form>
- </body>
- </html>
User:
- public class User {
- private String Username;
- private String password;
- public String getUsername() {
- return Username;
- }
- public String getPassword() {
- return password;
- }
- public void setUsername(String username) {
- Username = username;
- }
- public void setPassword(String password) {
- this.password = password;
- }
- }
- UserService:
- package com.westos.untitle2.CityService;
- import com.westos.untitle2.bean.User;
- import sun.rmi.log.LogInputStream;
- import java.util.ArrayList;
- import java.util.List;
- public class UserService {
- public List<User> setUser(){
- List<User> list=new ArrayList<>();
- User u1=new User();
- u1.setUsername("Bighead");
- u1.setPassword("4214963");
- list.add(u1);
- User u2=new User();
- u2.setUsername("lyy");
- u2.setPassword("0829");
- list.add(u2);
- return list;
- }
- }
success.html 程序, 自己根据需求设置.
来源: http://www.bubuko.com/infodetail-2701315.html