//時(shí)間類

Date date = new Date();

System.out.println(date);

//時(shí)間格式

SimpleDateFormat dataFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

//把時(shí)間按照當(dāng)前的格式轉(zhuǎn)化成字符串

String time = dataFormat.format(date);

System.out.println(time);

//計(jì)算時(shí)間的差

//2017:09:04~2017:10:01

//1.

SimpleDateFormat fataFormat2 = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");

Date date1 = fataFormat2.parse("2017:09:04 00:00:00");

Date data2 = fataFormat2.parse("2017:10:01 00:00:00");

//獲取時(shí)間距離1970年1月1日 0的毫秒數(shù)

long time1 = date1.getTime();

long time2 = data2.getTime();

long day = (time2-time1)/1000/60/60/24;

System.out.println(day);

}

}