Calender c=java.util.Calender.getInstance();c.add(Calender.DATE,+2);System.out.println(c.getTime());//輸出當前日期後二天的日期 Calender c=java.util.Calender.getInstance();c.add(Calender.DATE,-20);System.out.println(c.getTime());//輸出當前日期前20天的日期 相关文章： 2022-12-23 2022-12-23 2022-12-23 2021-12-18 2022-02-09 2022-12-23 2021-11-28 2022-12-23