java擷取UUID與UUID的校驗

UUID：

UUID，是Universally Unique Identifier的縮寫，UUID出現的目的，是為了讓分布式系統可以不借助中心節點，就可以生成UUID來辨別一些唯一的資訊。

代碼：

import java.util.UUID;
 
public class UUIDTest {
 
	public static void main(String[] args) {
		String uuid1 = "e65deb4c-a110-49c8-a4ef-6e69447968d6";
		String uuid2 = "ca4a8a92-d4ed-4fc4-8a4f-345c587fbdcb";
		String uuid3 = "e1f15f1d-6edb-4f70-8a05465se273eaf95a";
		System.out.println("check > " + uuid1 + " > " + isValidUUID(uuid1));
		System.out.println("check > " + uuid2 + " > " + isValidUUID(uuid2));
		System.out.println("check > " + uuid3 + " > " + isValidUUID(uuid3));
		System.out.println("build a uuid> " + getRandomUUID(null));
		System.out.println("build a uuid> " + getRandomUUID(null));
		System.out.println("build a uuid> " + getRandomUUID("kangyucheng"));
		System.out.println("build a uuid> " + getRandomUUID("kangyucheng"));
 
	}
 
	public static boolean isValidUUID(String uuid) {
		// UUID校驗
		if (uuid == null) {
			System.out.println("uuid is null");
		}
		String regex = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$";
		if (uuid.matches(regex)) {
			return true;
		}
		return false;
	}
 
	public static UUID getRandomUUID(String str) {
		// 産生UUID
		if (str == null) {
			return UUID.randomUUID();
		} else {
			return UUID.nameUUIDFromBytes(str.getBytes());
		}
	}
}
           

測試結果：

check > e65deb4c-a110-49c8-a4ef-6e69447968d6 > true

check > ca4a8a92-d4ed-4fc4-8a4f-345c587fbdcb > true

check > e1f15f1d-6edb-4f70-8a05465se273eaf95a > false

build a uuid>93ce6775-bc89-4849-8ae9-fb305c909700

build a uuid>7a61f2e0-903b-4904-b2bd-a075b19adb8c

build a uuid>8b68aa00-6a79-3cbb-996f-780f464f3aae

build a uuid>8b68aa00-6a79-3cbb-996f-780f464f3aae

作者：kangyucheng

來源：CSDN

原文：https://blog.csdn.net/Kangyucheng/article/details/86498341

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