servlet与ajax之间的数据传递

List<XtwhYhwh> xtwhYhwhs =xtwhYhwhServlet.xtwhYhwhDAO.findByBz(bz);     //返回json时会有问题因为hibernate的延迟加载问题     System.out.println(xtwhYhwhs+"14541541");JsonConfig jsonConfig = new JsonConfig();        jsonConfig.setJsonPropertyFilter(new net.sf.json.util.PropertyFilter(){                    public boolean apply(Object source, String name, Object value) {              if(name.equals("rczxUnitinfo")||name.equals("xtwhYhwhs")){                  return true;              }else{              return false;              }          }});           JSONArray json=JSONArray.fromObject(xtwhYhwhs,jsonConfig);         try {      response.setContentType("text/html;charset=gb2312");          PrintWriter out=response.getWriter();          out.println(json.toString());          out.flush();          out.close();      } catch (IOException e) {          e.printStackTrace();      }

      function initXtwhYhwh()    {          var id = $("#bmbz").val();           $.ajax({      type: "POST",      dataType:"json",      url: "<%=SystemResource.DOMAIN%>/XtwhYhwhServlet",       data: "id="+id,      success: function(xtwhYhwhs){       $("#xtwhyh").empty();    var i =$("#xtwhyh").val();    $(xtwhYhwhs).each(function(i){     $("#xtwhyh").append("<option name='xtwhyh'  value=\""+xtwhYhwhs[i].userid+"\">"+xtwhYhwhs[i].username+"</option>");    });     }  });        }