JSP 09课 

<%@ 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">
    -->
    
    <script type="text/javascript">
    function mycheck(){
        //检查用户名
        if(form1.userName.value==""){
            alert("请输入用户名");
            form1.userName.focus();
            return;
        }
        //判断密码
        if(form1.password.value==""){
            alert("请输入密码");
            form1.password.focue();
            return;
        }
        //判断验证码
        if(form1.validationCode.value==""){
             alert("请输入验证码");
             form1.validationCode.foucs();
             return;
        }
        //判断验证码是否有误
        if(form1.validationCode.value!=form1.validationcode1.value){
            alert("请输入正确的验证码");
            form1.validationCode.foucs();
            return;
        }
        form1.submit();
    }
    </script>
  </head>
  
  <body>
   <form action="dologin.jsp" method="post">
用户名:<input type="text" name="uname" value="小白" /><Br>
密码 ：<input type="password" name="upwd" value="88888"/><br>
<br>验证：<input type="text" name="validationCode" onKeyDown="if(event.keyCode==13){form1.submit.focus();}" size="6" style="margin-top:15px">
  <%
      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);
      //连接随机数
      String intsum=intmethod1+""+intmethod2+intmethod3+intmethod4;
  %>
  <!--设置隐藏域，验证比较时使用-->
  <div style="margin-top:15px">
  <input type="hidden" name="validationCode1" value="<%=intsum%>">
  <img src="images/<%=intmethod1%>.gif">
  <img src="images/<%=intmethod2%>.gif">
  <img src="images/<%=intmethod3%>.gif">
  <img src="images/<%=intmethod4%>.gif">

 <input type="submit" name="submit1" value="登录" onClick="mycheck()" style="margin-top:15px">

</form>
  </body>
</html>

 

posted @ 2020-06-11 13:13  闹瓜壳儿疼  阅读(113)  评论(0)    收藏  举报