javaee/JavaEEDZY/WebRoot/sign.jsp

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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>互助网-注册</title>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1,minimum-scale=1 maximum-scale=1">
	<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="css/zhaoshi.css">
	<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
	<link rel="stylesheet" href="css/bootstrap.min.css">
	 <style type="text/css">
	 	.error{
	 		color:red;
	 	}
	 	.show1{
	 		display:none;
	 	}
	 </style>
  </head>
  <body>
  <nav class="navbar navbar-default navbar-fixed-top">
   <div class="container-fluid">
    <div class="navbar-header"  >
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="javascript:void;">互助网</a>
    </div>
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="ZhaoLing" id="color" >招领平台</a></li>
        <li><a href="ShiWuServlet" id="color">失物平台</a></li>
        <li><a href="news" id="color">大家说法</a></li>
      </ul>
    </div><!-- /.navbar-collapse -->
   </div><!-- /.container-fluid -->
  </nav>
    <div class="container">
		<div class="row">
		<div class="col-md-4 col-sm-3"></div>
		<div class="col-md-4 col-sm-6">
			<div class="btn btn-primary btn-block btn-lg text-center" style="margin: 40px 0 30px;">注册账号<span style="color:red;">${signmessage }</span></div>
			<form action="Sign" method="post">
				<div class="form-group">
					<label>姓名<span id="spanname" class="error show1">(用户名应该在2到10个字符之内)</span></label>
					<input type="text" id="name" name="name" autofocus required placeholder="Enter Name......" class="form-control">
				</div>
				<div class="form-group">
					<label>学号<span id="spannumber" class="error show1">(学号应该在10到15个字符之内)</span></label>
					<input type="text" id="number" name="number" required placeholder="Enter Number......" class="form-control">
				</div>