自动登陆
login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>会员登录</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" />
<script src="js/jquery-1.11.3.min.js" type="text/javascript"></script>
<script src="js/bootstrap.min.js" type="text/javascript"></script>
<!-- 引入自定义css文件 style.css -->
<link rel="stylesheet" href="css/style.css" type="text/css" />
<style>
body {
margin-top: 20px;
margin: 0 auto;
}
.carousel-inner .item img {
width: 100%;
height: 300px;
}
.container .row div {
/* position:relative;
float:left; */
}
font {
color: #666;
font-size: 22px;
font-weight: normal;
padding-right: 17px;
}
</style>
</head>
<body>
<!-- 引入header.jsp -->
<jsp:include page="/header.jsp"></jsp:include>
<div class="container"
style="width: 100%; height: 460px; background: #FF2C4C url('images/loginbg.jpg') no-repeat;">
<div class="row">
<div class="col-md-7">
<!--<img src="./image/login.jpg" width="500" height="330" alt="会员登录" title="会员登录">-->
</div>
<div class="col-md-5">
<div
style="width: 440px; border: 1px solid #E7E7E7; padding: 20px 0 20px 30px; border-radius: 5px; margin-top: 60px; background: #fff;">
<font>会员登录</font>USER LOGIN
<div>
<span style="color: red">${loginInfo }</span>
</div>
<form class="form-horizontal" action="${pageContext.request.contextPath }/login" method="post">
<div class="form-group">
<label for="username" class="col-sm-2 control-label">用户名</label>
<div class="col-sm-6">
<input type="text" class="form-control" id="username" name="username"
placeholder="请输入用户名">
</div>
</div>
<div class="form-group">
<label for="inputPassword3" class="col-sm-2 control-label">密码</label>
<div class="col-sm-6">
<input type="password" class="form-control" id="inputPassword3" name="password"
placeholder="请输入密码">
</div>
</div>
<div class="form-group">
<label for="inputPassword3" class="col-sm-2 control-label">验证码</label>
<div class="col-sm-3">
<input type="text" class="form-control" id="inputPassword3"
placeholder="请输入验证码">
</div>
<div class="col-sm-3">
<img src="./image/captcha.jhtml" />
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<div class="checkbox">
<label> <input type="checkbox" name="autoLogin" value="autoLogin"> 自动登录
</label> <label> <input
type="checkbox"> 记住用户名
</label>
</div>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<input type="submit" width="100" value="登录" name="submit"
style="background: url('./images/login.gif') no-repeat scroll 0 0 rgba(0, 0, 0, 0); height: 35px; width: 100px; color: white;">
</div>
</div>
</form>
</div>
</div>
</div>
</div>
<!-- 引入footer.jsp -->
<jsp:include page="/footer.jsp"></jsp:include>
</body>
</html>
LoginServlet
package com.itheima.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.itheima.domain.User;
import com.itheima.service.UserService;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");
HttpSession session = request.getSession();
String username = request.getParameter("username");
String password = request.getParameter("password");
UserService service = new UserService();
User user = service.login(username,password);
if(user != null){
//登陆成功
//判断用户是否勾选自动登录
String autoLogin = request.getParameter("autoLogin");
if(autoLogin!=null){
Cookie cookie_username = new Cookie("cookie_username",username);
Cookie cookie_password = new Cookie("cookie_password",password);
cookie_username.setMaxAge(60*60);
cookie_password.setMaxAge(60*60);
cookie_username.setPath(request.getContextPath());
cookie_password.setPath(request.getContextPath());
response.addCookie(cookie_username);
response.addCookie(cookie_password);
}
//将user存入session
session.setAttribute("user", user);
response.sendRedirect(request.getContextPath()+"/index.jsp");
}else{
request.setAttribute("loginInfo", "用户名或密码错误");
request.getRequestDispatcher("/login.jsp").forward(request, response);
}
}
}
UserService
package com.itheima.service;
import java.sql.SQLException;
import com.itheima.dao.UserDao;
import com.itheima.domain.User;
public class UserService {
public User login(String username, String password) {
UserDao dao = new UserDao();
User user = null;
try {
user = dao.login(username,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return user;
}
}
UserDao
package com.itheima.dao;
import java.sql.SQLException;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import com.itheima.domain.User;
import com.itheima.utils.DataSourceUtils;
public class UserDao {
public User login(String username, String password) throws SQLException {
QueryRunner runner = new QueryRunner(DataSourceUtils.getDataSource());
String sql = "select * from user where username=? and password=?";
return runner.query(sql,new BeanHandler<User>(User.class),username,password);
}
}
AutoLoginFilter
package com.itheima.servlet;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.itheima.domain.User;
import com.itheima.service.UserService;
public class AutoLoginFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) resp;
HttpSession session = request.getSession();
//定义
String cookie_username = null;
String cookie_password = null;
//获得cookie中的用户名和密码进行登录
Cookie[] cookies = request.getCookies();
if(cookies!=null){
for (Cookie cookie : cookies) {
if("cookie_username".equals(cookie.getName())){
cookie_username = cookie.getValue();
}
if("cookie_password".equals(cookie.getName())){
cookie_password = cookie.getValue();
}
}
}
if(cookie_username != null && cookie_password != null){
//登录代码
UserService service = new UserService();
User user = service.login(cookie_username, cookie_password);
session.setAttribute("user", user);
}
chain.doFilter(req, resp);
}
}
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