集成hutool依赖,实现雪花算法工具类

依赖导入

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-captcha</artifactId>
    <version>5.3.9</version>
</dependency>

SnowFlakeUtil工具类代码

package com.myutil.id;

import cn.hutool.core.lang.Snowflake;
import cn.hutool.core.util.IdUtil;

public class SnowFlakeUtil {
    private long machineId ;
    private long dataCenterId ;


    public SnowFlakeUtil(long machineId, long dataCenterId) {
        this.machineId = machineId;
        this.dataCenterId = dataCenterId;
    }

    /**
     * 成员类，SnowFlakeUtil的实例对象的保存域
     */
    private static class IdGenHolder {
        private static final SnowFlakeUtil instance = new SnowFlakeUtil();
    }

    /**
     * 外部调用获取SnowFlakeUtil的实例对象，确保不可变
     */
    public static SnowFlakeUtil get() {
        return IdGenHolder.instance;
    }

    /**
     * 初始化构造，无参构造有参函数，默认节点都是0
     */
    public SnowFlakeUtil() {
        this(0L, 0L);
    }

    private Snowflake snowflake = IdUtil.createSnowflake(machineId,dataCenterId);

    public synchronized long id(){
        return snowflake.nextId();
    }

    public static Long getId() {
        return SnowFlakeUtil.get().id();
    }

}

使用

Long id = SnowFlakeUtil.getId();