java web记住密码_JavaWeb简单实现记住密码以及自动填充功能

约定不等于承诺〃 2022-11-03 10:40 33阅读 0赞

使用技术 jQuery druid MySQL Jackson AJAX JSON

–JSP页面

Created by IntelliJ IDEA.

User: QiLin

Date: 2020/7/28

Time: 13:55

To change this template use File | Settings | File Templates.

\--%>

管理员登录

### 管理员登录 ###

用户名：

密码：

验证码：

![Check\_card][Check_card]

--------------------

记住密码

$\{sessionScope.msg1\}

$\{sessionScope.msg2\}

**登录失败!**

$(function () \{

//密码重置为空

$("\#user").keydown(function () \{

$("\#password").val("");

\});

//刷新验证码

$("\#vcode").click(function () \{

var s= new Date().getTime();

this.src = "Check\_card?time="+s;

\});

//填充密码

$("\#user").blur(function () \{

$.post("GetCookie",\{uname:$(this).val()\},function (data) \{

$("\#password").val(JSON.parse(data));

);

\});

Servlet—登录package web;

import service.UserService;

import service.impl.UserServiceImpl;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.\*;

import java.io.IOException;

import java.net.URL;

import java.net.URLEncoder;

/\*\*

\* @author: QiLin

\* @date: 2020/8/1 14:32

\* @version: 1.0

\*/

@WebServlet( "/Login")

public class Login extends HttpServlet \{

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

request.setCharacterEncoding("utf-8");

String user = request.getParameter("user");

String pwd = request.getParameter("password");

String code = request.getParameter("verifycode");

String jzmm = request.getParameter("cookie");

String check\_card = (String) request.getSession().getAttribute("check\_card");

HttpSession session = request.getSession();

if (code.equalsIgnoreCase(check\_card)) \{

UserService userService = new UserServiceImpl();

int login = userService.login(user, pwd);

if (login == 1) \{

if ( jzmm !=null && jzmm.equals("true") ) \{

String username = URLEncoder.encode(user,"UTF-8");

String userpwd = URLEncoder.encode(user+"pwd","UTF-8");

Cookie name = new Cookie(username,username);

Cookie pwdpwd = new Cookie(userpwd,pwd);

Cookie jzmmm = new Cookie("jzmm",jzmm);

name.setMaxAge(1\*60\*60);

pwdpwd.setMaxAge(1\*60\*60);

jzmmm.setMaxAge(1\*60\*60);

session.setAttribute("username", user);

session.setAttribute("password", pwd);

response.addCookie(name);

response.addCookie(pwdpwd);

response.addCookie(jzmmm);

request.setAttribute("user",user);

request.getRequestDispatcher("index.jsp").forward(request,response);

\} else \{

request.setAttribute("user",user);

request.getRequestDispatcher("index.jsp").forward(request,response);

\} else \{

session.removeAttribute("msg1");

session.setAttribute("msg2","用户名或密码错误");

response.sendRedirect("login.jsp");

\} else \{

session.removeAttribute("msg2");

session.setAttribute("msg1","验证码错误");

response.sendRedirect("login.jsp");

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

doPost(request, response);

Servlet—获取密码package web;

import com.fasterxml.jackson.databind.ObjectMapper;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.\*;

import java.io.IOException;

import java.net.URLDecoder;

import java.net.URLEncoder;

/\*\*

\* @author: QiLin

\* @date: 2020/8/2 14:09

\* @version: 1.0

\*/

@WebServlet( "/GetCookie")

public class GetCookie extends HttpServlet \{

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

response.setContentType("text/html;charset=utf-8");

String user = request.getParameter("uname");

String password = "";

ObjectMapper mapper = new ObjectMapper();

// 获取cookie

Cookie\[\] cookies = request.getCookies();

// 如果为空，则停留在该页面

if(cookies !=null || cookies.length >0) \{

String username = URLEncoder.encode(user,"UTF-8");

String userpwd = URLEncoder.encode(user+"pwd","UTF-8");

for (int i = 0; i < cookies.length; i++) \{

if (cookies\[i\].getName().equals(username)) \{

user = URLDecoder.decode(cookies\[i\].getValue(),"UTF-8");

if (cookies\[i\].getName().equals(userpwd)) \{

password = cookies\[i\].getValue();

request.setAttribute("pwd",password);

String pwd = mapper.writeValueAsString(request.getAttribute("pwd"));

response.getWriter().write(pwd);

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

doPost(request, response);

Servlet—验证码package web;

import javax.imageio.ImageIO;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.awt.\*;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.util.Random;

/\*\*

\* @author: QiLin

\* @date: 2020/8/1 13:52

\* @version: 1.0

\*/

@WebServlet( "/Check\_card")

public class Check\_card extends HttpServlet \{

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

//设置宽高

int width = 100;

int height = 50;

//创建对象，在内存验证码图

BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE\_INT\_BGR);

//美化图片

Graphics graphics = image.getGraphics();

//画边框

graphics.setColor(Color.magenta);

graphics.drawRect(0,0,width-1,height-1);

//填充背景颜色

graphics.setColor(Color.cyan);//画笔颜色

graphics.drawRect(0,0,width,height);

//定义随机抽取池

String str = "QWERTYUIOPASDFGHJKLZXCVBNMqwertyuioplkjhgfdsazxcvbnm0123456789";

//生成随机角标

Random ran = new Random();

//接收验证码

StringBuffer sb = new StringBuffer();

//写入验证码

for (int i = 1; i <= 4; i++) \{

int index = ran.nextInt(str.length());

//获取随机字符

char c = str.charAt(index);

sb.append(c);

// //生成随机x轴

// int x = ran.nextInt(width-10) % (width-10-10+1)+10;

// //生成随机y轴

// int y = ran.nextInt(height-5) % (width-5-5+1)+5;

graphics.setFont(new Font("Tahoma", Font.BOLD, 18));

graphics.drawString(c+"",width/5\*i,height/2);

//存入session

String session\_check = sb.toString();

request.getSession().setAttribute("check\_card",session\_check);

//画干扰线

graphics.setColor(Color.green);

for (int i = 0; i < 10; i++) \{

int x1 = ran.nextInt(width);

int x2 = ran.nextInt(width);

int y1 = ran.nextInt(height);

int y2 = ran.nextInt(height);

graphics.drawLine(x1,y1,x2,y2);

//将图片画到页面

ImageIO.write(image,"jpg",response.getOutputStream());

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException \{

doPost(request, response);

[Check_card]:

java web记住密码_JavaWeb简单实现记住密码以及自动填充功能

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