public class TestDate {

?

?????? public String yesteday() {

??????????????
//?????????? 當(dāng)前時間
???????????????Calendar cal = Calendar.getInstance();

???????????//??日期的DATE減去10??就是往后推10 天 同理 +10 就是往后推十天
????????????? cal.add(Calendar.DATE, -10);

?

????????????? SimpleDateFormat sf = new SimpleDateFormat("yyyyMMddHHmmss");

?????????????

????????????? String str = sf.format(cal.getTime());

?????????????

????????????? System.out.print(str);

????????????? return str;

?????? }

?

?????? public static void main(String args[]) {

????????????? new TestDate().yesteday();

?????? }

?

}

記的用DATE 類的時候要先得到當(dāng)前的年,月,日,再將日數(shù)減或加.再new Date(year,month,day);
有了?Calendar 感覺方便多了.