Jdk提供的UUID生成

import java.util.UUID;

import org.junit.Assert;

public class UUIDGenerator {
	private UUIDGenerator() {
	}

	public static String getUUID() {
		UUID uuid = UUID.randomUUID();
		String str = uuid.toString();
		// 去掉"-"符号
		String temp = str.substring(0, 8) + str.substring(9, 13)
				+ str.substring(14, 18) + str.substring(19, 23)
				+ str.substring(24);
		return temp;
	}

	// 获得指定数量的UUID
	public static String[] getUUID(int number) {
		Assert.assertFalse(number < 1);
		String[] ss = new String[number];
		for (int i = 0; i < number; i++) {
			ss[i] = getUUID();
		}
		return ss;
	}
}