ajax跨域获取返回值

js代码

$.ajax({
         async:false,
            url: 'https://***/api/prepareApi.getDanMu?sqlMapId=findBarrage',  // 跨域URL
            type: 'get',
            dataType: 'jsonp',
            jsonp: 'jsoncallback', //默认callback
            jsonpCallback: 'handleResponse', //设置回调函数名
            //data: mydata,
            timeout: 5000,
            success: function(data){
              }

      }});

后台代码 （返回时 转json格式，括在js自定义回掉函数名里）

@RequestMapping("api/prepareApi.getDanMu")
    public String getDanMu() throws Exception {
        Map<String, Object> map = getParameterMap();
        System.out.println("api/prepareApi.getUserUploadWeiKeTeachApi: " + map);

        map.put("sqlMapId", map.get("sqlMapId").toString());

        List<Map<String, Object>> list = openDap.queryForList(map);

        return "handleResponse(" +  JSONArray.parseArray(JSON.toJSONString(list)) + ")";
    }