jsp作业 

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录页面</title>
<style type="text/css">
    body{font-size: 16px}
</style>
</head>
<body bgcolor="white">
    <form action="loginCheck.jsp" name="form1" method="post">
        用户名：<input type="text" name="userName" size="16">
        <br>密    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>
       <!--  按下回车键的值-->
       <%
        int code1 = (int)(((Math.random())*11)-1);
        int code2 = (int)(((Math.random())*11)-1);
        int code3 = (int)(((Math.random())*11)-1);
        int code4 = (int)(((Math.random())*11)-1);
        //将的到的随机数进行连接
        String intsum = ""+code1+code2+code3+code4;
       %>
       <!--设置隐藏域验证比较时使用  -->
        <input type="hidden" name="validationCode1" value="<%=intsum%>">
        <input type="text"   value="<%=intsum%>" readonly="true" size=2>
        <br>
        <input type="button" name="submit1" value="登录" onclick="mycheck()">
        <input type="reset" value="刷新">
    </form>
</body>
<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.focus();
            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;
        }
        //判断验证码是否正确
        if(form1.validationCode.value!=form1.validationCode1.value){
            alert("请输入正确的验证码！！");
            form1.validationCode.focus();
            return;
        }
        form1.submit();
    }
</script>
</html>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>处理登录页面数据</title>
</head>
<body bgcolor="white">
    <%
    //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("zixuan")&&password.equals("rushb")){
            session.setAttribute("userName", name);
            response.sendRedirect("main.jsp");
 
        }else{
            response.sendRedirect("Login.jsp");
 
        }
    }else{
        response.sendRedirect("Login.jsp");
    }
    %>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>系统主页面</title>
</head>
<body bgcolor="white">
    <%
    String name = (String)session.getAttribute("userName");
    %>
    您好<%=name %>，欢迎访问<br>
    <a href="exit.jsp">[退出系统]</a>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>退出系统</title>
</head>
<body>
    <%
    session.invalidate();
    response.sendRedirect("Login.jsp");
    %>
</body>
</html>

posted @ 2020-04-15 10:14  akaxuan  阅读(166)  评论(0)    收藏  举报