推荐两款java开发实用工具 hutool 和 lombok

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.6.3</version>
</dependency>

package com.example.demo;

import cn.hutool.json.JSONUtil;
import lombok.Data;
import java.util.ArrayList;
import java.util.List;
@Data
public class User {
    private String userEmail;

    private String userName;

    private List<UserExample> userExampleList;
}
@Data
class UserExample {
    protected String orderByClause;

    protected boolean distinct;

    public static void main(String[] args) {
        User user = getUser();
        String jsonStr = JSONUtil.toJsonStr(user);
        System.out.println("==============json数据格式==============");
        System.out.println(jsonStr);

        Object obj1 = JSONUtil.getByPath(JSONUtil.parse(user), "userName");
        System.out.println("========================================");
        System.out.println("通过hutool获取User对象的属性userName值");
        System.out.println(obj1);

        Object obj2 = JSONUtil.getByPath(JSONUtil.parse(user), "userExampleList[1].orderByClause");
        System.out.println("========================================");
        System.out.println("通过hutool获取User对象的属性List<UserExample>中第二个对象的orderByClause值");
        System.out.println(obj2);
    }

    /**
     * 初始化测试数据
     * @return
     */
    private static User getUser() {
        User user = new User();
        user.setUserName("wook");
        user.setUserEmail("xxxx@qq.com");
        //设置一个UserExample的集合，方便看demo效果
        List<UserExample> list = new ArrayList<>();
        UserExample userExample = new UserExample();
        userExample.setDistinct(true);
        userExample.setOrderByClause("小吴测试1");
        UserExample userExample2 = new UserExample();
        userExample2.setDistinct(false);
        userExample2.setOrderByClause("小吴测试2");
        list.add(userExample);
        list.add(userExample2);
        user.setUserExampleList(list);
        return user;
    }
}

<dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.16.10</version>
  </dependency>

@Data
@Builder
@Slf4j
 class BuilderExample {
    private String name;
    private int age;
    public static void main(String[] args) {
        BuilderExample builderExample = BuilderExample.builder().age(11).name("wook").build();
        log.info(JSONUtil.toJsonStr(builderExample));
    }
}