int，long，String转化为时间Date格式

        //int时间类型转化为String格式日期输出
        //注意转化过来的时间不能直接用转化成int类型，因为时间是13位长度，而int类型长度为10，必须经过处理再接转化，否则获取时间戳的时间会出错
        int time = (int) System.currentTimeMillis();
        String intDate = DateUtils.format(time, "yyyy-MM-dd HH:mm");
        System.out.println(intDate);

        int time11 = (int) (System.currentTimeMillis()/1000l);
        String date11 = DateUtils.format((new Long(time11))*1000, "yyyy-MM-dd HH:mm");
        System.out.println(date11);

        //long类型转换为String格式日期
        long time1 = System.currentTimeMillis();
        String date1 = DateUtils.format(time1, "yyyy-MM-dd HH:mm");
        System.out.println(date1);

        //String类型的时间戳转化为String日期格式,输出格式由SimpleDateFormat控制
        String time2 = "1637380527";
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long longTime = new Long(new Long(time2)*1000);
        Date date2 = new Date(longTime);
        String dateTime = format.format(date2);
        System.out.println(dateTime);

        SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");
        long longTime1 = new Long(new Long(time2)*1000);
        Date date3 = new Date(longTime1);
        String dateTime1 = format1.format(date3);
        System.out.println(dateTime1);