如何用ajax 实现点击下拉框传值到后台并返回页面渲染

本人在实现的功能是

通过点击仓库按钮查询出所有的仓库，通过仓库查询出相应的商品，并在页面渲染

HTML 页面：

<td class="title"><span >仓库</span></td>
                           <td colspan="6">
                               <select class="form-control inpu" id="kufang" name="storageRoomId">
                                   <option>请选择库房</option>
                                   <#list storageroomList as storageroom>
                                       <option value="${storageroom.storageRoomId}">${storageroom.storageRoomName}</option>
                                   </#list>
                               </select>
                           </td>

                    <td colspan="14">
                           <table class="table inside" id="tabletest">
                               <thead>
                               <tr class="first" >
                                   <th colspan="2">序号</th>
                                   <th colspan="2">商品名称</th>
                                   <th colspan="2">商品单位</th>
                                   <th colspan="2">商品类型</th>
                                   <th colspan="2">商品型号</th>
                                   <th colspan="2">仓储数量</th>
                                   <th colspan="2">盘点数量</th>
                                   <th colspan="2">盈亏数量</th>
                               </tr>
                               </thead>
                       
                           </table>

js 代码：

//给库房添加了一个事件，获取点击后的值
$("#kufang").change(function(e){
       // debugger
       //获取下拉框里的值
       console.log($("#kufang").val());
       var zhi=$("#kufang").val();
//使用ajax ,post 方式，相当于URL：goodstgkuangfang，kfm:zhi 参数
       $.post("goodstgkuangfang",{kfm:zhi},function(data){
       debugger
           $("#tabletest tr:gt(0)").remove();
           // alert("获取到的map"+data)
         data1= data["goodslist"]
         data2= data["goodsUnitList"]
         data3= data["goodsTypeList"]


           for(i in data1) //data.data指的是数组，数组里是8个对象，i为数组的索引
           {
               for(x in data2){
                   if(data2[x].goodsUnitId==data1[i].goodsUnitId){
                       var goodsUnitName = data2[x].goodsUnitName;
                   }
                       }
               for(y in data3){
                   if(data3[y].goodsTypeId==data1[i].goodsTypeId){
                       var goodsTypeName = data3[y].goodsTypeName;
                   }
               }
               // $("#tabletest tr:not(:first)").empty();
               var tr;
               var iii=parseInt(i)
               // alert("运算类型为"+typeof(i) ) ;
              var ii= parseInt(i)+1
               tr='<td colspan="2">'+ii+'</td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center readonly="readonly" name="details['+i+'].goodsName" value='+data1[i].goodsName+'></td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center readonly="readonly" name="details['+i+'].sysGoodsUnit" value='+goodsUnitName+'></td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center readonly="readonly" name="details['+i+'].goodsType" value='+goodsTypeName+'></td>'+
                   '<td colspan="2"><input type="text" style=border:none;text-align:center readonly="readonly" name="details['+i+'].goodsSpecificationModel" value='+data1[i].goodsSpecificationModel+'></td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center readonly="readonly" name="details['+i+'].goodsStock" value='+data1[i].goodsStock+'></td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center name="details['+i+'].physicalInventory"></td>'+'' +
                   '<td colspan="2"><input type="text" style=border:none;text-align:center name="details['+i+'].profitLossNum"></td>'
               $("#tabletest").append('<tr>'+tr+'</tr>')
           }

       })

   });

后台代码：

 
    @RequestMapping("goodstgkuangfang")
    public @ResponseBody Map<String,List> selectgoodstgkuangfang(
                                         @RequestParam("kfm")Long kfm){
        //通过仓库名称的id查询商品
        List<SysGoods> goodslist = sysGoodsDao.findSysGoodsByStorageRoomIdAndGoodsStatus(kfm, "0");
        //查询所有的商品类型
        List<SysGoodsUnit> goodsUnitList = sysGoodsUnitDao.findAllByGoodsUnitStatus("0");
        //查询所欲的商品单位
        List<GoodsType> goodsTypeList = goodsTypeDao.findAllByGoodsTypeStatus("0");
        Map<String,List> map =new HashMap<String,List>();
        map.put("goodslist",goodslist);
        map.put("goodsUnitList",goodsUnitList);
        map.put("goodsTypeList",goodsTypeList);
        System.out.println(map);

//        String s = JSONObject.toJSONString(map);
        return map;
}

//实现后的效果