怎样使easyui的json重新加载

List selectPProduct = productClassFacade.selectPProductClassListLazy(map);
setOperate(selectPProduct, request.getContextPath());
String json = JSONArray.fromObject(selectPProduct).toString();
System.out.println(json+"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
PrintWriter write = response.getWriter();
write.write(json);
write.flush();

    我是模糊查询。但是出不来模糊查询的数据，页面还是原来的页面

$('#dg').datagrid('reload',{kw:关键字})

你的服务器获取kw关键字进行查询