代码如下：

package cn.gov.csrc.util;import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;public class RandomUtil {/*** 生成随机文件名：当前年月日时分秒+五位随机数* * @return*/public static String getRandomFileName() {SimpleDateFormat simpleDateFormat;simpleDateFormat = new SimpleDateFormat("yyyyMMdd");Date date = new Date();String str = simpleDateFormat.format(date);Random random = new Random();int rannum = (int) (random.nextDouble() * (99999 - 10000 + 1)) + 10000;// 获取5位随机数return rannum + str;// 当前时间}public static void main(String[] args) {String fileName = RandomUtil.getRandomFileName();System.out.println(fileName);//8835920140307}
}