$.ajax({
                    type: "post",
                    dataType: "jsonp",
                    //传递给请求处理程序，用以获得jsonp回调函数名的参数名(默认为:callback)
                    jsonp: "callback",
                    //自定义的jsonp回调函数名称，默认为jQuery自动生成的随机函数名
                    jsonpCallback:"success_jsonpcallback",
                    url: "http://localhost:8080/vdt/json/queryMetadata.json",
                    success: function (msg) {
                        alert("succes");
                    },
                    error:function(e){
                        alert("error");
                    }
                });

@RequestMapping("/queryMetadata")
    @ResponseBody
    public Object queryMetadata(String id,String callback) {
        MetaDataBeanVo metaDataBeanVo= mampManager.getMetaDataSource("f4050e690a62402a8c87668eb10ed425,f4050e690a62402a8c87668eb10ed425");
        List<MetaDataBeanVo> list=new ArrayList<MetaDataBeanVo>();
        list.add(metaDataBeanVo);
        GenericResult gr = new GenericResult();
        gr.setResult(list);
        gr.setMessage("查询元数据");
        gr.setSuccess(true);
        gr.setErrorCode("");

        //兼容jsonp 和json模式
        if(StringUtils.isEmpty(callback)){
            return gr;
        }else{
            MappingJacksonValue mappingJacksonValue=new MappingJacksonValue(gr);
            mappingJacksonValue.setJsonpFunction(callback);
            return mappingJacksonValue;
        }
    }