java时间工具类-蒲公英云

java时间工具类

1.日期相加减

public  static Date addDate(Date date,int day){
        if(date == null){
            return date;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.DAY_OF_MONTH, day);
        return calendar.getTime();
    }

2.时间加毫秒

public static Date addSecond(Date date,int second) {    
        Calendar calendar = Calendar.getInstance();    
        calendar.setTime(date);    
        calendar.add(Calendar.SECOND, second);    
        return calendar.getTime();    
    }

3.当前时间是否在某个点之后

public static boolean isAfterTime(String strTime)throws ParseException {
        SimpleDateFormat df = new SimpleDateFormat("HH:mm");
        Date now = df.parse(df.format(new Date()));
        Date begin = df.parse(strTime);
        Calendar nowTime = Calendar.getInstance();
        nowTime.setTime(now);
        Calendar beginTime = Calendar.getInstance();
        beginTime.setTime(begin);
        return nowTime.after(beginTime);
    }

4.格式化日期 yyyy-MM-dd HHss（利用apache提供的工具类）

public static String formatDateYmdhms(Date date){
        if(date == null){
            return "";
        }
        return DateFormatUtils.format(date, ConstantsOMS.FORMAT_DATE_YMDHMS);
    }

5.格式化日期 yyyy-MM-dd（利用apache提供的工具类）

public static String formatDateYmd(Date date){
        if(date == null){
            return "";
        }
        return DateFormatUtils.format(date, ConstantsOMS.FORMAT_DATE_YMD);
    }

6.格式化日期 yyyy.MM.dd（利用apache提供的工具类）

public static String formatDatePointYmd(Date date){
        if(date == null){
            return "";
        }
        return DateFormatUtils.format(date, ConstantsOMS.FORMAT_DATE_POINT_YMD);
    }

获取当月最后一天日期

public static Date getLastDate(Date date) {

       Calendar calendar = Calendar.getInstance();
       calendar.setTime(date);
       calendar.add(Calendar.MONTH, 1);
     calendar.set(Calendar.DAY_OF_MONTH, 0);
       return calendar.getTime();
   }