急如何把JSP页面中的下拉列表框与数据库相绑定

<script type="text/javascript" src="js/jquery-1.4.2.js"></script>
     <script type="text/javascript">
         $('document').ready(function(){ 
             
             //取得学校放入下拉框
            $.ajax({
                   type: "post",
                   url: "GetAllSchoolServlet",
                   dataType: "String",
                   success: function (data) {
                       var obj = eval('(' + data + ')');
                       for (var i=0;i<obj.length;i++){
                               var scode = obj[i].scode;
                               var sname = obj[i].sname; 
                               var opt = '<option value="'+scode+'"selected>'+sname+'</option>';
                               $('#selSchool').append(opt);
                       }
                   },
                   error: function (XMLHttpRequest, textStatus, errorThrown) {
                       alert("ajax取学校信息出错-"+errorThrown);
                   }
            });
      });
</script>