List集合转换成JSONArray对象

1、pom.xml依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.68</version>
</dependency>

2、实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Person {
    private int id;
    private int age;
    private String name;
}

3、实现

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.it.vo.Person;
import java.util.ArrayList;
import java.util.List;

public class Util {
    /**
     * List集合转换成JSONArray对象
     *
     * @param list List集合
     * @return JSONArray
     */
    private JSONArray listToArry(List<Person> list){
        return JSONArray.parseArray(JSON.toJSONString(list));
    }

    public static void main(String[] args) {
        Person person1 = new Person(1, 23, "张三");
        Person person2 = new Person(2, 29, "李四");
        List<Person> personList = new ArrayList<>();
        personList.add(person1);
        personList.add(person2);
        Util util = new Util();
        JSONArray jsonArray = util.listToArry(personList);
        System.out.println(jsonArray);
    }
}

//结果：[{"name":"张三","id":1,"age":23},{"name":"李四","id":2,"age":29}]