线程安全的ID生成器

介绍一个改造升级版本的雪花算法ID生成器，

优点是线程安全的，并且永远不可能出现重复ID。放心使用。

目前网上流行的ID生成器，在for循环里，或者多线程的时候会出现重复。

介绍一个新出炉的开源ID生成器，完美解决这个问题。

 

示例源码地址：https://github.com/geektcp/example-id-generator

 核心是thy-core依赖包里面的IdGenerator类的getId方法，不传参数就直接使用，也可以传参数进一步细分。

另外在spring的entity类的主键上加入注解，自动生成。

在for循环或者多线程环境下任意使用都不会有问题。

 

package com.geektcp.id;

import com.geektcp.common.core.generator.IdGenerator;

public class App {
    public static void main(String[] args) {
        base();
        singleGen();
        multiThread();
    }


    private static void base() {
        long a = 0;
        String c = null;

        a = IdGenerator.getId();
        System.out.println(a);
        a = IdGenerator.getId(1, 3);

        System.out.println(a);
        IdGenerator.setSplit("/");
        c = IdGenerator.getId("PRE");

        System.out.println(c);
        IdGenerator.setInstance(10, 0);

        a = IdGenerator.getId();

        System.out.println(a);
    }


    private static void singleGen() {
        for (int i = 0; i < 100; i++) {
            System.out.println(IdGenerator.getId());
        }
    }

    private static void multiThread() {
        new Thread(() -> {
            for (int i = 0; i < 100; i++) {
                System.out.println(IdGenerator.getId("A"));
            }
        }, "A").start();

        new Thread(() -> {
            for (int i = 0; i < 100; i++) {
                System.out.println(IdGenerator.getId("B"));
            }
        }, "A").start();

    }


}

 

 

java依赖包，直接在maven官方仓库搜索（https://mvnrepository.com/artifact/com.geektcp.common）

thy-core

这里采用

1.0.0.RELEASE

最新版本即可。

 

    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.geektcp.common/thy-core -->
        <dependency>
            <groupId>com.geektcp.common</groupId>
            <artifactId>thy-core</artifactId>
            <version>1.0.0.RELEASE</version>
        </dependency>
    </dependencies>

 

打印结果：

1069366794495500288
1069366794499694592
PRE/1069366794503888896
1069366794503888897
1069366794503888898
1069366794503888899
1069366794503888900
1069366794503888901
1069366794503888902
1069366794503888913
1069366794503888914
1069366794503888915
1069366794520666134
1069366794520666135
1069366794520666136
1069366794520666137
1069366794520666138
1069366794520666139
1069366794520666140
1069366794520666141
1069366794520666142
1069366794520666143
1069366794520666144
A/1069366795044954112
A/1069366795044954113
A/1069366795053342723
A/1069366795053342725
A/1069366795053342726
A/1069366795053342727
A/1069366795053342728
A/1069366795057537024
A/1069366795057537025
A/1069366795057537034
A/1069366795057537035
A/1069366795057537036
A/1069366795057537037
A/1069366795057537038
A/1069366795057537039
A/1069366795057537040
B/1069366795053342724
B/1069366795070119936
B/1069366795070119937
B/1069366795070119938
B/1069366795070119939
B/1069366795070119940
B/1069366795070119941
B/1069366795070119942
B/1069366795070119943
B/1069366795070119944
B/1069366795070119945
B/1069366795070119946
B/1069366795070119947
B/1069366795070119965
B/1069366795070119966
B/1069366795070119967
B/1069366795070119968
B/1069366795070119969
B/1069366795074314240
B/1069366795074314241
B/1069366795074314242
B/1069366795074314243
B/1069366795074314244
B/1069366795078508559
B/1069366795078508560
B/1069366795082702851
A/1069366795095285798
A/1069366795095285799
A/1069366795095285800
A/1069366795095285801
A/1069366795116257280
A/1069366795116257281
A/1069366795116257282
A/1069366795116257283
A/1069366795116257284
A/1069366795116257285