標籤：
<%@page import="com.jerehedu.bao.User"%><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><% //擷取一個使用者 User user=(User)session.getAttribute("user"); %><% String uname=request.getParameter("uname"); String upwd=request.getParameter("upwd"); if(uname!=null&&!uname.equals("")&&upwd!=null&&!upwd.equals("")) { //建立一個user對象 user=new User(uname,upwd); session.setAttribute("user", user); }%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP ‘ch0402.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <script type="text/javascript"> /* *驗證使用者名稱或密碼是否填寫 */ function check(){ var uname=document.getElementById(‘uname‘).value; var upwd=document.getElementById(‘upwd‘).value; if(uname==‘‘) { alert(‘請填寫使用者名稱‘); return false; } else if(upwd==‘‘) { alert(‘請填寫密碼‘); return false; } } </script> </head> <body> <form action="login1.jsp" onsubmit="return check()" method="post"> <table> <tr> <td>使用者名稱：</td> <td> <input type="text" name="uname" id="uname" value="" /> </td> </tr> <tr> <td>密碼：</td> <td> <input type="password" name="upwd" id="upwd" value="" /> </td> </tr> <tr> <td> <input type="submit" value="登入" /> </td> </tr> <% if(user!=null&&!(user.getUserName().equals("admin")&&user.getPassword().equals("123456"))) { %> <tr> <td colspan="2"> 使用者名稱或密碼錯誤 </td> </tr> <% } else if(user!=null){ response.sendRedirect("welcome.jsp"); } %> </table> </form> </body>
- 登出1:
- <body> 歡迎您: <%=session.getAttribute("user").toString() %> <a href="Day5_1_zhuxiao.jsp">登出</a> </body>
- 登出2:
- <body> <% session.invalidate(); response.sendRedirect("Day5_1.jsp"); //response.addHeader("refresh","2; URL=Day5_1.jsp"); %> 您已登出 </body>
- 清Null 物件
- <% //把session對象清空 session.invalidate(); response.sendRedirect("login.jsp"); %>
jsp 中登入驗證 登出 的模版
