java 两个日期比较是否相等。

Calendar cal1 = Calendar.getInstance();
      cal1.setTime(date1);
      Calendar cal2 = Calendar.getInstance();
      cal2.setTime(new DateTime(date2);
      boolean isSameYear = cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR);
      boolean isSameMonth = isSameYear&& cal1.get(Calendar.MONTH) == cal2.get(Calendar.MONTH);
      boolean isSameDate = isSameMonth&& cal1.get(Calendar.DAY_OF_MONTH) == cal2.get(Calendar.DAY_OF_MONTH);

      System.out.println(---------"+isSameDate);