springboot 接收复杂的json数据

Question

Springboot接受json数据

问题相关代码

```json数据
[{"q_type":"01","q_must":"1","q_name":"这是名字1","q_option":"[\"2\",\"3\"]","t_id":10017,"t_uid":1},
{"q_type":"02","q_must":"1","q_name":"这是名字2","q_option":"[\"5\",\"6\"]","t_id":10017,"t_uid":1},
{"q_type":"03","q_must":"1","q_name":"这是名字3","q_option":"[]","t_id":10017,"t_uid":1}]

    @CrossOrigin
    @PostMapping("api/newQuestion")
    @ResponseBody //新建问卷
    public JSONObject getJsonVal(@RequestBody JSONObject data) throws IOException {
    JSONObject json = new JSONObject();

//***************************
//只想知道这里怎样获取q_type、q_must、q_name、数组q_option、t_id、t_uid
//***************************

//返回操作结果
        if (flag)
            json.put("msg","success");
        else
            json.put("msg","fail");

        return json;
}

###### 运行结果及报错内容 
2022-04-30 01:18:28.161  WARN 19884 --- [nio-8081-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver :
 Resolved [org.springframework.http.converter.HttpMessageNotReadableException: 
JSON parse error: Cannot deserialize instance of `com.alibaba.fastjson.JSONObject<java.lang.String,java.lang.Object>`
 out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: 
Cannot deserialize instance of `com.alibaba.fastjson.JSONObject<java.lang.String,java.lang.Object>` 
out of START_ARRAY token
 at [Source: (PushbackInputStream); line: 1, column: 2]]

Answer 1

定义一个实体类

package com.example.demo.web;

import lombok.Data;
import lombok.ToString;

@Data
@ToString
public class RequestData {

    private String q_type;
    private String q_must;
    private String q_name;
    private String q_option;
    private int t_id;
    private int t_uid;

}

MainController.java

package com.example.demo.web;

import com.alibaba.fastjson.JSONObject;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.List;

@RestController
@RequestMapping("/api")
public class MainController {

    @CrossOrigin
    @PostMapping("/newQuestion")
    @ResponseBody //新建问卷
    public JSONObject getJsonVal(@RequestBody List<RequestData> data) throws IOException {
        JSONObject json = new JSONObject();
        System.out.println("data = " + data);
//***************************
//只想知道这里怎样获取q_type、q_must、q_name、数组q_option、t_id、t_uid
//***************************

//返回操作结果
        if (true)
            json.put("msg", "success");
        else
            json.put("msg", "fail");

        return json;
    }

}

postman 请求

接受到参数