我用jQuery调用java业务类的方法这样有什么问题?
我直接上代码了,我刚学Jquery。
            要求是,当我点击页面的下拉列表选择不同的分数的时候,通过jQuery跳到java类中,再由这个类去访问数据库,得到一个集合,要将这个集合遍历以表格的形势显示在页面中,
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
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>信息显示</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">
<!--
.STYLE2 {font-size: 24px}
-->
     </style>
     <script type="text/javascript" src="jquery-1.2.3-intellisense.js"></script>  
     <script type="text/javascript">
      $(document).ready(function() {
		$("#sel").change(function() {
		  var score =this.value;
		alert(this.value);
		$.ajax({
		type: "POST",
		url: "/biz/impl/InfoBizImpl.java/getBySql2",// 我要调用InfoBizzImpl类中的getBySql2这个方法
		data:score, //这里是我要传入方法的参数
		contentType: "application/json; charset=utf-8",
		success: function(msg) {  
		$("#div1").html(msg);
		},
		error: function(xhr,msg,e) {
		alert(msg);
		}
		});
		});
		});  
     </script>
</head>    
   <body>
   <br>
   <table width="400" border="0" align="center">
     <tr>
       <td class="STYLE2">请选择分数的查询条件</td>
     </tr>
     <tr>
       <td><form name="form1" method="post" action="">
         <label>
         <select name="select1" id="sel">
           <option value="0" selected>全部</option>
           <option value="90">大于90分</option>
           <option value="80">大于80分</option>
           <option value="70">大于70分</option>
           <option value="60">大于60</option>
           <option value="50">不及格</option>
         </select>
         </label>         
             </form>
       </td>
     </tr>
     <tr>
       <td><table width="400" border="0">
         <tr>
           <td>编号</td>
           <td>姓名</td>
           <td>科目</td>
           <td>成绩</td>
         </tr>
         <tr>
         <hr/&