SpringMVC中JSONP的基本使用

@RequestMapping("/check/{param}/{type}")
    @ResponseBody
    public Object checkData(@PathVariable String param, @PathVariable Integer type, String callback) {

        TaotaoResult result = null;

        // 参数有效性校验
        if (StringUtils.isBlank(param)) {
            result = TaotaoResult.build(400, "校验内容不能为空");
        }
        if (type == null) {
            result = TaotaoResult.build(400, "校验内容类型不能为空");
        }
        if (type != 1 && type != 2 && type != 3) {
            result = TaotaoResult.build(400, "校验内容类型错误");
        }
        // 校验出错
        if (null != result) {
            if (null != callback) {
                JSONPObject jsonpObject = new JSONPObject(callback, result);
                return jsonpObject;
            } else {
                return result;
            }
        }
        // 调用服务
        try {
            result = userService.checkData(param, type);

        } catch (Exception e) {
            result = TaotaoResult.build(500, ExceptionUtil.getStackTrace(e));
        }

        if (null != callback) {
            JSONPObject jsonpObject = new JSONPObject(callback, result);
            return jsonpObject;
//            MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(result);
        //    mappingJacksonValue.setJsonpFunction(callback);
//            mappingJacksonValue.setValue(callback);
//            return mappingJacksonValue;
        } else {
            return result;
        }
    }