为什么我的json中文是乱码

{"courseId":12223,"title":"娣卞叆娴呭嚭java璇剧▼","imgPath":"resource/imgs/course-img.jpg","learningNum":12345,"duration":7200,"level":2,"levelDesc":"涓骇","descr":"澶氱嚎绋嬫棩甯稿紑鍙戝父鐢ㄧ煡璇嗭紝鍛靛懙mow","chapterList":null}

代码如下：

        @RequestMapping(value="/{courseId}",method=RequestMethod.GET)
        public @ResponseBody Course GetJson(@PathVariable Integer courseId){
            return courseService.getCoursebyId(courseId);
        }