java 计算制定时间内的月数

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于 2008-11-09 19:47:00 发布

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private int getMonths(GregorianCalendar g1, GregorianCalendar g2) {
       int elapsed = 0;
       GregorianCalendar gc1, gc2;
       if (g2.after(g1)) {
           gc2 = (GregorianCalendar) g2.clone();
           gc1 = (GregorianCalendar) g1.clone();
       } else {
           gc2 = (GregorianCalendar) g1.clone();
           gc1 = (GregorianCalendar) g2.clone();
       }
       gc1.clear(Calendar.MILLISECOND);
       gc1.clear(Calendar.SECOND);
       gc1.clear(Calendar.MINUTE);
       gc1.clear(Calendar.HOUR_OF_DAY);
       gc1.clear(Calendar.DATE);
       gc2.clear(Calendar.MILLISECOND);
       gc2.clear(Calendar.SECOND);
       gc2.clear(Calendar.MINUTE);
       gc2.clear(Calendar.HOUR_OF_DAY);
       gc2.clear(Calendar.DATE);
       while (gc1.before(gc2)) {
           gc1.add(Calendar.MONTH, 1);
           elapsed++;
       }
       return elapsed;
   }