java雪花_java雪花算法

java工具类

1.IdGeneratorSnowflake.java用于生成雪花算法，分为有参构造和无参构造

package com.sale.util.common;

import cn.hutool.core.lang.Snowflake;

import cn.hutool.core.net.NetUtil;

import cn.hutool.core.util.IdUtil;

import lombok.Data;

import lombok.Synchronized;

import lombok.extern.slf4j.Slf4j;

import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

/**

* @author wjn

* @version 1.0

* @date 2020/12/10 18:13

*/

@Slf4j

@Component

public class IdGeneratorSnowflake {

private long workerId =0;

private long datacenterId=1;

private Snowflake snowflake= IdUtil.createSnowflake(workerId,datacenterId);

@PostConstruct

public void init(){

try {

workerId = NetUtil.ipv4ToLong(NetUtil.getLocalhostStr());

log.info("当前机器的workerId:{}",workerId);

}catch (Exception e){

e.printStackTrace();

log.info("当前机器的workerId获取失败",e);

workerId=NetUtil.getLocalhostStr().hashCode();

}

}

public synchronized long snowflakeId(){

return snowflake.nextId();

}

public synchronized long snowflakeId(long workerId,long datacenterId){

Snowflake snowflake= IdUtil.createSnowflake(workerId,datacenterId);

return snowflake.nextId();

}

public static void main(String[] args) {

System.out.println(new IdGeneratorSnowflake().snowflakeId());

}

}

2.service层

public interface DeliverGoodsService {

String getIDBySnowFlake();

}

3.serviceimpl层

@Slf4j

@Service

@Transactional

public class DeliverGoodsServiceImpl implements DeliverGoodsService {

@Autowired

private IdGeneratorSnowflake idGeneratorSnowflake;

@Override

public String getIDBySnowFlake() {

ExecutorService executorService= Executors.newFixedThreadPool(5);

for (int i=1;i<=20;i++){

executorService.submit(()->{

System.out.println(idGeneratorSnowflake.snowflakeId());

});

}

executorService.shutdown();

return "hello snowflake";

}

}

项目设计的工具类

cn.hutool

hutool-all

5.5.2

java工具类库包含时间戳生成，图片工具类，加密工具类，ip工具类等一系列工具类，非常强大

github开源地址 https://github.com/looly/hutool/官方中文文档 https://www.hutool.cn/docs/#/

哔哩哔哩springcloudalibaba上硅谷视频视频 https://www.bilibili.com/video/BV18E411x7eT?from=search&seid=13488436241056256401上硅谷github地址sql及脑图 https://github.com/acloudyh/springCloud