Java判断两个日期时间是否在同一天

使用org.apache.commons.lang3.time.DateUtils包下的isSameDay方法

DateUtils.isSameDay(Date1, Date2)；

源代码

 /**
     * <p>Checks if two date objects are on the same day ignoring time.</p>
     * <p>检查两个日期对象是否在同一天忽略时间</p>
     * 
     * <p>28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true.
     * 28 Mar 2002 13:45 and 12 Mar 2002 13:45 would return false.
     * </p>
     * 
     * @param date1  the first date, not altered, not null
     * @param date2  the second date, not altered, not null
     * @return true if they represent the same day 如果它们代表同一天，则为true
     * @throws IllegalArgumentException if either date is <code>null</code>
     * @since 2.1
     */
    public static boolean isSameDay(final Date date1, final Date date2) {
        if (date1 == null || date2 == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        final Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);
        final Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        return isSameDay(cal1, cal2);
    }