浅谈java获取UUID与UUID的校验

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校验
		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) {
		// 产生UUID
		if (str == null) {
			return UUID.randomUUID();
		} else {
			return UUID.nameUUIDFromBytes(str.getBytes());
		}
	}
}