package zhiguolian; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.commons.lang3.RandomStringUtils; public class hah { public static void main(String[] args) { SimpleDateFormat format = new SimpleDateFormat("yyMMddhhmmss"); String uid_pfix = format.format(new Date()); String random = RandomStringUtils.randomNumeric(4).toString(); System.out.println(uid_pfix+random); } }