ServiceImpl ：

@Override
	public List<?> courseAd(String KEYNAME, String KEYCODE) {
		String  str = "{‘courseAdUrl‘:‘http://xy.baoai.com/curriculum/detail/24‘,‘courseAdID‘:‘1001‘}";
		String  str1 = "{‘courseAdUrl‘:‘http://xy.baoai.com/curriculum/detail/22‘,‘courseAdID‘:‘1002‘}";
		String  str2 = "{‘courseAdUrl‘:‘http://xy.baoai.com/curriculum/detail/10‘,‘courseAdID‘:‘1003‘}";
		List<Object> list = new ArrayList<>();
		list.add(str);
		list.add(str1);
		list.add(str2);
		JSONArray jsonArray = JSONArray.fromObject(list);
		return jsonArray;
	
	}

Controller

@PostMapping("/courseAd")
	@ResponseBody
	public ResultModel courseAd(String KEYNAME, String KEYCODE){
		List<?> list = courseService.courseAd(KEYNAME, KEYCODE);
		return ResultModel.build(1, "success", list);
	}

返回JSON数据

{"status":1,"msg":"success","data":[{"courseAdUrl":"http://xy.baoai.com/curriculum/detail/24","courseAdID":"1001"},{"courseAdUrl":"http://xy.baoai.com/curriculum/detail/22","courseAdID":"1002"},{"courseAdUrl":"http://xy.baoai.com/curriculum/detail/10","courseAdID":"1003"}],"success":null}

Java String TO Json