Java List对象集合转Json Json转List对象集合

Java List对象集合转Json Json转List对象集合

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;
ample.springbootdemo.domain.dto.Student;
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：" + JSONString(param));// 调用三方接口//HttpUtil.post("/urlTest", JSONString(param), 5);// 三方接收并转为list对象集合String result = JSONString(param);log.info("三方接收：" + result);JSONObject studentJson = JSONObject.parseObject(result);// 转成list对象集合List<Student> studentLists = JSONObject.("studentList").toString(), Student.class);log.info("studentList: " + studentList);log.info("studentLists: " + studentLists);}}

输出结果：

09:47:06.833 [main] ample.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] ample.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] ample.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] ample.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