Java 日期加减

 

 

public static void main(String[] args) {
Date date = new Date();
System.out.println(date);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.MONTH, 3);
Date date2 = cal.getTime();
System.out.println(date2);
}

实现减的话，负数就可以了