随机流水号工具类

public class serialnumber { /** * 由年月日时分秒+3位随机数 * 生成流水号 * @return */ public static String Getnum(){ String t = getStringDate(); int x=(int)(Math.random()*900)+100; String serial = t + x; return serial; } /** * 获取现在时间 * @return返回字符串格式yyyyMMddHHmmss */ public static String getStringDate() { Date currentTime = new Date(); SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss"); String dateString = formatter.format(currentTime); return dateString; } }