分布式序列号ID算法---UUID

===========================================通过UUID获取分布式序列号ID

import java.util.UUID;

public class UuidWorker {
    
    /**
     * UUID方式获取序列号(36位)
     * @return
     *       reg bdd52c7a-8079-4b15-8dc6-61322247b594
     */
    public static String toUuid() {
        UUID randomUUID = UUID.randomUUID();
        return randomUUID.toString();
    }
    
    /**
     * UUID方式获取序列号(32位)，字母小写
     * @return
     *      reg bdd52c7a80794b158dc661322247b594
     */
    public static String toUuid2() {
        UUID randomUUID = UUID.randomUUID();
        return randomUUID.toString().replace("-", "");
    }
    
    /**
     * UUID方式获取序列号(32位)，字母大写
     * @return
     *      reg 9D3D155E155F4357B0829D66848A18AA
     */
    public static String toUuid3() {
        UUID randomUUID = UUID.randomUUID();
        return randomUUID.toString().replace("-", "").toUpperCase();
    }
}

===========================================通过UUID获取分布式序列号ID测试类

    /**
     * UUID实现序列号获取
     */
    @Test
    public void test_uuid() {
        //bdd52c7a-8079-4b15-8dc6-61322247b594
        System.out.println(UuidWorker.toUuid());
        System.out.println(UuidWorker.toUuid2());
        System.out.println(UuidWorker.toUuid3());
    }