1.login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.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"> --> <style type="text/css"> body{font-size:16px;} </style> <script type="text/javascript"> function mycheck(){ if(form1.userName.value==""){ alert("用户名不能为空，请输入用户名"); form1.userName.focuse(); return; } if(form1.password.value==""){ alert("密码不能为空，请输入密码"); form1.password.focus(); return; } if(form1.validationCode.value==""){ alert("验证码不能为空，请输入验证码"); form1.validationCode.focus(); return; } if(form1.validationCode.value!=form1.validationCode1.value){ alert("请输入正确的验证码"); form1.validationCode.focus(); return; } form1.submit1(); } </script> </head> <body bgcolor="pink"> <form action="loginCheck.jsp" name="form1" method="post"> 用户名：<input type="text" name="userName" size="24"><br> 密 码：<input type="password" name="password" size="24"><br> 验证码：<input type="text" name="validationCode" onKeyDown="if(event.keyCode==13){form1.submit.focus();}"size="4"> <% int intmethod1=(int)((((Math.random())*5))+1); int intmethod2=(int)((((Math.random())*5))+1); int intmethod3=(int)((((Math.random())*5))+1); int intmethod4=(int)((((Math.random())*5))+1); String intsum=intmethod1+""+intmethod2+intmethod3+intmethod4; %> <input type="hidden" name="validationCode1" value="<%=intsum%>"> <img style="height:20px;weight:20px" src="<%=intmethod1 %>.png"> <img style="height:20px;weight:20px" src="<%=intmethod2 %>.png"> <img style="height:20px;weight:20px" src="<%=intmethod3 %>.png"> <img style="height:20px;weight:20px" src="<%=intmethod4 %>.png"> <br> <br> <input type="submit" name="submit1" value="登录" onClick="mycheck()"> <input type="reset" value="重置"> </form> <br> </body> </html>
2.loginCheck.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.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"> --> </head> <body bgcolor="pink"> <% request.setCharacterEncoding("utf-8"); String name=request.getParameter("userName"); String password=request.getParameter("password"); if(request.getParameter("validationCode1").equals(request.getParameter("validationCode"))){ if(name.equals("xiaojunzi")&&(password.equals("123456"))){ session.setAttribute("userName", name); response.sendRedirect("main.jsp"); }else{ response.sendRedirect("login.jsp"); } }else{ response.sendRedirect("login.jsp"); } %> <br> </body> </html>
3.main.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.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"> --> </head> <body bgcolor="pink"> <% String name=(String)session.getAttribute("userName"); %> 您好<%=name %>,欢迎您访问<br> <a href="exit.jsp">【退出系统】</a> <br> </body> </html>
exit.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.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"> --> </head> <body> <% session.invalidate(); response.sendRedirect("login.jsp"); %> <br> </body> </html>
5.图片
