java延时

```

1.Thread.currentThread().sleep(8000);//毫秒

2.long start1 = System.currentTimeMillis();

logger.info("updateShop时间:"+start1);

try {

    TimeUnit.SECONDS.sleep(10);

} catch (InterruptedException e) {

    e.printStackTrace();

}

long start2 = System.currentTimeMillis();

logger.info("updateShop时间:"+(start2-start1));

```