uuid工具类封装

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

public class IdGen {

	private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");

	/**
	 * 封装JDK自带的UUID, 通过Random数字生成, 中间无-分割.
	 */
	public static String uuid() {
		return UUID.randomUUID().toString().replaceAll("-", "");
	}

	public static String getTxSn() {
		return sdf.format(new Date()) + UUID.randomUUID().toString().replace("-", "").substring(4, 10);
	}

	public static String generateTxnTime() {
		return (new SimpleDateFormat("yyyyMMddHHmmss")).format(new Date());
	}
}