登录时记住账号密码功能示例代码

登录JSP页面

 1 <%
 2         request.setCharacterEncoding("utf-8");
 3         String username = "";
 4         String password = "";
 5         Cookie[] cookies =  request.getCookies();
 6         if(cookies!=null && cookies.length>0){
 7             for(Cookie c : cookies){
 8                 System.out.println(c.getName()+":"+URLDecoder.decode(c.getValue(), "utf-8"));
 9                 if(c.getName().equals("username")){
10                     username =URLDecoder.decode(c.getValue(),"utf-8") ;
11                 }
12                 if(c.getName().equals("pwd")){
13                     password = c.getValue();
14                 }
15             }
16         }
17     
18      %>
19     <form action="login.jsp" method="post">
20         <input name="action" value="login" type="hidden">
21         <input name="username" placeholder="用户名" value="<%=username %>" required="" type="text">
22         <hr class="hr15">
23         <input name="password" placeholder="密码" value="<%=password %>" required="" type="password">
24         <hr class="hr15">
25         <input type="checkbox" name="jizhu" value="jizhu" checked="checked">
26         十天内记住我的登录状态
27         <hr class="hr15">
28         <input value="登录" style="width:100%;" type="submit">
29         <hr class="hr20">
30         <!-- 帮助 <a onClick="alert('请联系管理员')">忘记密码</a> -->
31     </form>

处理登录信息的JSP页面

 1 <% request.setCharacterEncoding("utf-8"); %>
 2 <jsp:useBean id="user" class="com.po.User" scope="page"></jsp:useBean>
 3 <jsp:useBean id="userDao" class="com.dao.UserDao" scope="page"></jsp:useBean>
 4 <jsp:setProperty property="*" name="user"/>
 5 <%
 6     
 7     String[] jizhu = request.getParameterValues("jizhu");
 8     if(jizhu!=null && jizhu.length>0){
 9         Cookie nameCookie = new Cookie("username",URLEncoder.encode(user.getUsername(), "utf-8") );
10         Cookie pwdCookie = new Cookie("pwd",user.getPassword());
11         nameCookie.setMaxAge(60);
12         pwdCookie.setMaxAge(60);
13         response.addCookie(nameCookie);
14         response.addCookie(pwdCookie);
15     }else{
16         Cookie[] cookies =  request.getCookies();
17         if(cookies!=null && cookies.length>0){
18             for(Cookie c : cookies){
19                 if(c.getName().equals("username")||c.getName().equals("pwd")){
20                     c.setMaxAge(0);
21                     response.addCookie(c);
22                 }
23             }
24         }
25     }
26 
27     if(userDao.login(user)){
28         session.setAttribute("name", user.getUsername());
29         request.getRequestDispatcher("main.jsp").forward(request, response);
30     }else{
31         response.sendRedirect("error.jsp");
32     }
33 
34 
35 %>

 

posted @ 2017-01-24 22:20  Web1024  阅读(1011)  评论(0)  编辑  收藏  举报