<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.57</version>
		</dependency>

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

/**
 * @auther cheng
 * @create 2021-11-09-17:03
 */
@RestController
@ResponseBody
public class JsonController {
    @PostMapping("/test1")
    public void create_questionare_task(@RequestBody JSONObject param){
        JSONObject aaaJSON = param.getJSONObject("aaa");
        Aaa aaa = JSONObject.toJavaObject(aaaJSON, Aaa.class);
        System.out.println(aaa.toString());
        JSONArray questions = param.getJSONObject("questionare").getJSONArray("questions");
        for(int i = 0; i < questions.size(); i++){
            JSONObject question_json = (JSONObject)questions.getJSONObject(i); //这里不能是get(i),get(i)只会得到键值对
            Question question = (Question)JSONObject.toJavaObject(question_json,Question.class);
            System.out.println(question.toString());
        }
    }
}