时间戳格式化

假如你拿到一个时间戳如:  1535077733658  代码如下:

@Test
    public void testTime()throws Exception{
        long time = System.currentTimeMillis();
        Date dateTime = new Date(time);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:dd");
        String result = simpleDateFormat.format(dateTime);
        System.out.println(time);  //1535077733658
        System.out.println(result); //2018-08-24 10:28:24
    }