有三四个页面，页面开头部分是一个判断要不要转到这个页面的代码。1.如果不符合跳转的条件，其中几个都能正确判断，会弹出一个对话框。唯独有一个页面不弹对话框，而是直接报错。2.如果符合跳转的条件，那个页面就能正常显示了。出错页面代码如下：（其中html之前是我所说的前面相同的判断代码）
<%@ page contentType="text/html;charset=UTF-8"%>
<%@ include file="/Common.jsp"%>
<%@ include file="/Check.jsp"%>
<%
String username = (String) session.getValue("UserName");
if(!Employee.IsExist(username))
{ %>
<script>
alert("您还没有添加过基本资料，请先添加！");
window.history.back();
</script>
<% }
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<title><%=title%></title>
<link rel="stylesheet" href="/PersonManage/css/style.css"
type="text/css" media="screen">
<script type="text/javascript"
src="/PersonManage/datePicker/WdatePicker.
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 52 in the jsp file: /vip_info.jsp
ÕË cannot be resolved
49: <table border="1& ......
