Java中常用的时间操作方法

    /**
     * 
     * @param 要转换的毫秒数
     * @return 该毫秒数转换为 * days * hours * minutes * seconds 后的格式
     * @author fy.zhang
     */ 
    public static String formatDuring(long mss) { 
        long days = mss / (1000 * 60 * 60 * 24); 
        long hours = (mss % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60); 
        long minutes = (mss % (1000 * 60 * 60)) / (1000 * 60); 
        long seconds = (mss % (1000 * 60)) / 1000; 
        return days + " days " + hours + " hours " + minutes + " minutes " 
                + seconds + " seconds "; 
    } 
    /**
     * 
     * @param begin 时间段的开始
     * @param end   时间段的结束
     * @return  输入的两个Date类型数据之间的时间间格用* days * hours * minutes * seconds的格式展示
     * @author fy.zhang
     */ 
    public static String formatDuring(Date begin, Date end) { 
        return formatDuring(end.getTime() - begin.getTime()); 
    }