问题一：

在用JSONObject传参到controller接收为空白的问题：

@RestController
@RequestMapping("/callback")
public class CallbackApiController {
    Logger logger = LoggerFactory.getLogger(this.getClass());

    @PostMapping("/callBackJson")
    public void callBackJSON(@RequestBody org.json.JSONObject jsonObject){
        logger.info("传递参数，param={}",jsonObject.toString());
        logger.info("-------->回调成功！<------------");
    }


}

运行结果：

2020-05-14 13:53:47.398 INFO 32904 --- [io-16016-exec-1] c.t.c.controller.CallbackApiController : 传递参数，param={}
2020-05-14 13:53:47.398 INFO 32904 --- [io-16016-exec-1] c.t.c.controller.CallbackApiController : -------->回调成功！<------------

将JSONObject的类型从

org.json.JSONObject

替换为

com.alibaba.fastjson.JSONObject

的运行成功，结果如下：

2020-05-14 13:56:09.585 INFO 33684 --- [io-16016-exec-2] c.t.c.controller.CallbackApiController : 传递参数，param={"url":"www.baidu.com"}
2020-05-14 13:56:09.585 INFO 33684 --- [io-16016-exec-2] c.t.c.controller.CallbackApiController : -------->回调成功！<------------

 

问题二

public static void main(String[] args) {
JSONObject json = new JSONObject();
JSONArray array = new JSONArray();
json.put("mm","22");
json.put("timestamp","jljlj");
array.add(json);
json.clear();
json.put("mm","jjj");
json.put("timestamp","oooo");
array.add(json);;
System.out.println(array.toJSONString());
}
运行结果[{"mm":"jjj","timestamp":"oooo"},{"$ref":"$[0]"}]
这样导致传送数据给第三方的接口时总是报错500解析不了，这是第二个加入的是第一个的引用，索引应该创建两个对象加入array中，如下正常
public static void main(String[] args) {
JSONObject json = new JSONObject();
JSONObject json2 = new JSONObject();
JSONArray array = new JSONArray();
json.put("mm","22");
json.put("timestamp","jljlj");
json2.put("mm","jjj");
json2.put("timestamp","oooo");
array.add(json);
array.add(json2);
System.out.println(array.toJSONString());
}
运行结果：[{"mm":"22","timestamp":"jljlj"},{"mm":"jjj","timestamp":"oooo"}]