Java List对象集合转Json & Json转List对象集合-Toy模板网

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使用了阿里巴巴的 fastjson 首先引入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>2.0.32</version>
</dependency>

示例如下


import com.alibaba.fastjson.JSONObject;
import com.example.springbootdemo.domain.dto.Student;
import lombok.extern.log4j.Log4j2;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @Author Let's go Lakers
 * @Date 2023/5/30
 **/
@Log4j2
public class JsonToListTest {

    public static void main(String[] args) {
        List<Student> studentList = new ArrayList<>();
        Student student1 = new Student("张三", 23, "女", "山东省烟台市芝罘区环海路2号");
        Student student2 = new Student("李四", 19, "男", "安徽省六安市霍邱县安徽霍邱经济开发区G35济广高速");
        studentList.add(student1);
        studentList.add(student2);
        Map<String, Object> param = new HashMap<>();
        param.put("studentList", studentList);
        // 把List对象集合作为json格式推给第三方接口
        log.info("入参：" + JSONObject.toJSONString(param));
        // 调用三方接口
        //HttpUtil.post("/urlTest", JSONObject.toJSONString(param), 5);

        // 三方接收并转为list对象集合
        String result = JSONObject.toJSONString(param);
        log.info("三方接收：" + result);
        JSONObject studentJson = JSONObject.parseObject(result);
        // 转成list对象集合
        List<Student> studentLists = JSONObject.parseArray(studentJson.get("studentList").toString(), Student.class);

        log.info("studentList: " + studentList);
        log.info("studentLists: " + studentLists);

    }

}

输出结果：文章来源地址https://www.toymoban.com/news/detail-617941.html

09:47:06.833 [main] INFO com.example.springbootdemo.Test.JsonToListTest - 入参：{"studentList":[{"address":"山东省烟台市芝罘区环海路2号","age":23,"name":"张三","sex":"女"},{"address":"安徽省六安市霍邱县安徽霍邱经济开发区G35济广高速","age":19,"name":"李四","sex":"男"}]}
09:47:06.836 [main] INFO com.example.springbootdemo.Test.JsonToListTest - 三方接收：{"studentList":[{"address":"山东省烟台市芝罘区环海路2号","age":23,"name":"张三","sex":"女"},{"address":"安徽省六安市霍邱县安徽霍邱经济开发区G35济广高速","age":19,"name":"李四","sex":"男"}]}
09:47:06.855 [main] INFO com.example.springbootdemo.Test.JsonToListTest - studentList: [Student(name=张三, age=23, sex=女, address=山东省烟台市芝罘区环海路2号), Student(name=李四, age=19, sex=男, address=安徽省六安市霍邱县安徽霍邱经济开发区G35济广高速)]
09:47:06.855 [main] INFO com.example.springbootdemo.Test.JsonToListTest - studentLists: [Student(name=张三, age=23, sex=女, address=山东省烟台市芝罘区环海路2号), Student(name=李四, age=19, sex=男, address=安徽省六安市霍邱县安徽霍邱经济开发区G35济广高速)]

Process finished with exit code 0

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