jsp第5个作业

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>

   <form action="logincheck.jsp" name="form1" method="post">

   用户名:<input type="text" name="userName" size="16"><br>

   密&nbsp;&nbsp;&nbsp;&nbsp;码:

   <input type="password" name="password" size="18"><br>

   验证码:<input type="text" name="validationCode"

        onkeyDown="if(event.keyCode==13){form1.submit.focus();}" size=6>

        <%

        int intmethod1 = (int)(((Math.random())*11)-1);

        int intmethod2 = (int)(((Math.random())*11)-1);

        int intmethod3 = (int)(((Math.random())*11)-1);

        int intmethod4 = (int)(((Math.random())*11)-1);

        //将的到的随机数进行连接

        String intsum = ""+intmethod1+intmethod2+intmethod3+intmethod4;

       %>

       <!--设置隐藏域验证比较时使用  -->

        <input type="hidden" name="validationCode1" value="<%=intsum%>">

        <input type="text"   value="<%=intsum%>"  size=5>

   <br>

   <input type="submit" name="submit1" value="登录" onClick="mycheck()">

   &nbsp;

   <input type="reset" value="重置">

   </form>

     <br>

  </body>

</html>

logincheck.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<html>

<head>

 <title>处理登录页面的数据</title>

</head>

<body bgcolor="pink">

 <%

    //设置请求的编码，永远解决中文乱码问题

    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("chenan")&&password.equals("123456")){

            session.setAttribute("userName", name);

            response.sendRedirect("main.jsp");

        }else{

            response.sendRedirect("login.jsp");

        }

    }else{

        response.sendRedirect("login.jsp");

    }

    %>

 </body>

 </html>

main.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

 <html>

<head>

<title>系统主页面</title>

 </head>

 <body bgcolor="pink">

<%

 //获取保存在session中的用户名

String name=(String)session.getAttribute("userName");

 %>

 您好<%=name%>,欢迎您访问！<br>

 <a href="exit.jsp">[退出系统]</a>

 </body>

 </html>

exit.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

 <html>

 <head>

 <title>退出系统</title>

</head>

 <body>

 <%

 session.invalidate();//销毁session

 response.sendRedirect("login.jsp");

 %>

 </body>

 </html>

巴特西

jsp第5个作业

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