package baofoo.utils; import org.junit.Test; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Random; import java.util.logging.SimpleFormatter; /** * 2 * @Author: zhangting_li * 3 * @Date: 2019/4/1 17:35 * 4 */ public class RandomHelper { public static String getRandom(){ SimpleDateFormat simpleDateFormat; simpleDateFormat=new SimpleDateFormat("yyyyMMdd"); String date=simpleDateFormat.format(new Date()); Random random=new Random(); int rannum= (int)(random.nextDouble()*(99999-10000 + 1))+ 10000; // System.out.println(rannum); String rand=date+rannum; return rand; } }