日期操作比较全面得代码

Java 的Date操作保留 测试可以采用junitTest 或者main方法测试验证

    public static String formatDate(java.util.Date date) {
        return formatDateByFormat(date, "yyyy-MM-dd");
    }

    public static String formatDateByFormat(java.util.Date date, String format) {
        String result = "";
        if (date != null) {
            try {
                SimpleDateFormat sdf = new SimpleDateFormat(format);
                result = sdf.format(date);
            } catch (Exception ex) {
            	logger.error(ex.getMessage());
            }
        }
        return result;
    }

    public static java.util.Date parseDate(java.sql.Date date) {
        return date;
    }

    public static java.sql.Date parseSqlDate(java.util.Date date) {
        if (date != null) {
            return new java.sql.Date(date.getTime());
        } else {
            return null;
        }
    }

    public static String format(java.util.Date date, String format) {
        String result = "";
        try {
            if (date != null) {
                java.text.DateFormat df = new java.text.SimpleDateFormat(format);
                result = df.format(date);
            }
        } catch (Exception e) {
        	logger.error(e.getMessage());
        }
        return result;
    }

    public static String format(java.util.Date date) {
    	if(null!=date){
    		return format(date, "yyyy/MM/dd");
    	}
       return null;
    }

    public static String format1(java.util.Date date) {
    	if(null!=date){
    		 return format(date, "yyyy-MM-dd");
    	}
        return null;
    }

    public static int getYear(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.YEAR);
    }

    public static int getMonth(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.MONTH) + 1;
    }

    public static int getDay(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.DAY_OF_MONTH);
    }

    public static int getHour(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.HOUR_OF_DAY);
    }

    public static int getMinute(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.MINUTE);
    }

    public static int getSecond(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.get(java.util.Calendar.SECOND);
    }

    public static long getMillis(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        return c.getTimeInMillis();
    }

    public static int getWeek(java.util.Date date) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTime(date);
        int dayOfWeek = c.get(java.util.Calendar.DAY_OF_WEEK);
        dayOfWeek = dayOfWeek - 1;
        if (dayOfWeek == 0) {
            dayOfWeek = 7;
        }
        return dayOfWeek;
    }

    public static String getDate(java.util.Date date) {
        return format(date, "yyyy/MM/dd");
    }

    public static String getDate(java.util.Date date,String formatStr) {
        return format(date, formatStr);
    }


    public static String getTime(java.util.Date date) {
        return format(date, "HH:mm:ss");
    }

    public static String getDateTime(java.util.Date date) {
        return format(date, "yyyy-MM-dd HH:mm:ss");
    }
    
    /**
     * 日期月份相加减
     * @param date 具体的时间
     * @param month 相加减的月份
     * @return 处理后的时间
     */
    public static Date addMonth(Date date, int month) {
    	Calendar calendar = Calendar.getInstance();
    	calendar.setTime(date);
    	calendar.add(Calendar.MONTH, month);
    	return calendar.getTime();
    }
    
    /**
     * 日期相加
     * @param date Date
     * @param day int
     * @return Date
     */
    public static java.util.Date addDate(java.util.Date date, int day) {
        java.util.Calendar c = java.util.Calendar.getInstance();
        c.setTimeInMillis(getMillis(date) + ((long) day) * 24 * 3600 * 1000);
        return c.getTime();
    }
    
    /**
     * 日期相减
     * @param date Date
     * @param date1 Date
     * @return int
     */
    public static int diffDate(java.util.Date date, java.util.Date date1) {
        return (int) ((getMillis(date) - getMillis(date1)) / (24 * 3600 * 1000));
    }
    
    /**
     * 日期相减(返回秒值)
     * @param date Date
     * @param date1 Date
     * @return int
     * @author 
     */
    public static Long diffDateTime(java.util.Date date, java.util.Date date1) {
        return (Long) ((getMillis(date) - getMillis(date1))/1000);
    }

    public static java.util.Date getdate(String date) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        return sdf.parse(date);
    }

    public static java.util.Date getdate1(String date) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sdf.parse(date);
    }
    
    public static java.util.Date getMaxTimeByStringDate(String date) throws Exception {
    	String maxTime = date + " 23:59:59";
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    	return sdf.parse(maxTime);
    }
    /**
     * 获得当前时间
     * @return
     * @throws ServiceException 
     */
    public static Date getCurrentDateTime() throws Exception
    {
    	Date date=new Date();
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");    	
        String result = DateUtil.getDateTime(date);
		return sdf.parse(result);
    }
    
    public static String getCurrentDateTimeToStr() throws Exception {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
		return sdf.format(getCurrentDateTime());
	}
    public static String getCurrentDateTimeToStr2() throws Exception {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		return sdf.format(getCurrentDateTime());
	}

    public static Long getWmsupdateDateTime() {
		Calendar cl=Calendar.getInstance();
		
		return cl.getTimeInMillis();
	}
    
    public static Integer getLeftSeconds(String date)throws Exception{
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    	Date condition = sdf.parse(date);
    	long n = condition.getTime();
    	long s = sdf.parse(getCurrentDateTimeToStr2()).getTime();
//    	System.out.println("开始时间:"+date+"-->"+(int)((s-n)/1000));
    	return (int)((s-n)/1000);
    }
    
    /**
     * 获得时间戳
     * @return
     * @throws Exception
     */
    public static String getTime(){
    	Date date=new Date();
    	return String.valueOf(date.getTime());
    }
    
	/** 判断日期格式是否正确 */	
	public static boolean validateDate(String dateString){
		//使用正则表达式 测试 字符 符合 dddd-dd-dd 的格式(d表示数字)
		Pattern p = Pattern.compile("\\d{4}+[-]\\d{2}+[-]\\d{2}+");
		Matcher m = p.matcher(dateString);
		if(!m.matches()){	
			return false;
			} 
 		//得到年月日
		String[] array = dateString.split("-");
		int year = Integer.parseInt(array[0]);
		int month = Integer.parseInt(array[1]);
		int day = Integer.parseInt(array[2]);
		
		if(month<1 || month>12){	
			return false;
			}
		int[] monthLengths = new int[]{0, 31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
		if(isLeapYear(year)){
			monthLengths[2] = 29;
		}else{
			monthLengths[2] = 28;
		}
		int monthLength = monthLengths[month];
		if(day<1 || day>monthLength){
			return false;	
		}
		return true;
	}
    
	/** 是否是闰年 */
	public static boolean isLeapYear(int year){
		return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) ;
	}
	
	/**
	 * 将时间格式的字符串，转换为时间
	 * 
	 * @param str 时间格式的字符串
	 * @param pattern 转换格式
	 * @return java.util.Date
	 */
	public static Date parseToDate(String str, String pattern) {
		DateFormat df = new SimpleDateFormat(pattern);
		try {
			return df.parse(str);
		} catch (ParseException e) {
		}
		return null;
	}	
	
	/**
	 * 将时间格式的字符串，转换为时间
	 * 
	 * @param str 时间格式的字符串
	 * @param pattern 转换格式
	 * @return java.util.Date
	 */
	public static Date parseToDateWithThrowException(String str, String pattern) throws ParseException{
		DateFormat df = new SimpleDateFormat(pattern);
		return df.parse(str);
	}	
	
	public static Date getLastDayOfMonth(int year, int month) {     
        Calendar cal = Calendar.getInstance();     
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month);
        cal.set(Calendar.DAY_OF_MONTH, 1);
        cal.add(Calendar.MONTH, -1);
        cal.set(Calendar.DAY_OF_MONTH,cal.getActualMaximum(Calendar.DAY_OF_MONTH));  
       return cal.getTime();  
    }   
	
	public static Date getFirstDayOfMonth(int year, int month) {     
        Calendar cal = Calendar.getInstance();  
        cal.set(Calendar.YEAR, year);  
        cal.set(Calendar.MONTH, month);
        cal.set(Calendar.DAY_OF_MONTH, 1);
        cal.add(Calendar.MONTH, -1);  
       return cal.getTime();  
    }
	
	public static String getFirstDayOfMonthStr(String yearMonth) {
		int year = getYear(yearMonth);
		int month = getMonth(yearMonth);
        return getFirstDayOfMonthStr(year, month);
    }

	private static int getYear(String yearMonth) {
		return Integer.parseInt(yearMonth.substring(0, 4));//get year
	}

	private static int getMonth(String yearMonth) {
		return Integer.parseInt(yearMonth.substring(4, 6));//get month
	}

	public static String getLastDayOfMonthStr(int year, int month) {     
		Calendar cal = Calendar.getInstance();   
	    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month);     
        cal.set(Calendar.DAY_OF_MONTH,1);
        cal.add(Calendar.DAY_OF_MONTH,-1); 
        return sdf.format(cal.getTime());
    }
	
	public static String getLastDayOfMonthStr(String yearMonth) {     
		int year = getYear(yearMonth);
		int month = getMonth(yearMonth);
        return getLastDayOfMonthStr(year, month);
    }
	
	public static String getFirstDayOfMonthStr(int year, int month) {     
        Calendar cal = Calendar.getInstance();  
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        cal.set(Calendar.YEAR, year);  
        cal.set(Calendar.MONTH, month-1);  
        cal.set(Calendar.DAY_OF_MONTH,cal.getMinimum(Calendar.DATE)); 
        return sdf.format(cal.getTime());
    } 
	


	/** 
     * 返回当月最后一天的日期 
     */  
    public static Date getLastDayOfMonth(Date date) {  
        Calendar calendar = convert(date);  
        calendar.set(Calendar.DATE, calendar.getMaximum(Calendar.DATE));  
        return calendar.getTime();  
    }  
  
    /** 
     * 返回当月最后一天的日期 
     */  
    public static Date getFirstDayOfMonth(Date date) {  
        Calendar calendar = convert(date);  
        calendar.set(Calendar.DATE, calendar.getMinimum(Calendar.DATE));  
        return calendar.getTime();  
    }  
  
    /** 
     * 将日期转换为日历 
     * @param date 日期 
     * @return 日历 
     */  
    private static Calendar convert(Date date) {  
        Calendar calendar = Calendar.getInstance();  
        calendar.setTime(date);  
        return calendar;  
    }  
       
    public static Date getDayOfThisMonth(int year, int month, int day) {     
    	Calendar cal = Calendar.getInstance();  
    	cal.set(Calendar.YEAR, year);  
    	cal.set(Calendar.MONTH, month);
    	cal.set(Calendar.DAY_OF_MONTH, day);
    	cal.add(Calendar.MONTH, -1);  
    	return cal.getTime();  
    }
    
    /** 
    * 获得指定日期的前一天 
    * @param specifiedDay 
    * @return 
    * @throws Exception 
    */ 
	public static String getCurrentDayBefore(Date date,String format) {
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		int day = c.get(Calendar.DATE);
		c.set(Calendar.DATE, day - 1);

		String dayBefore = new SimpleDateFormat(format).format(c.getTime());
		return dayBefore;
	}
    
	/**
	 * 检查日期时间段是否重叠
	 * @param checkDate
	 * @param startDate
	 * @param endDate
	 * @return
	 */
	public static boolean checkDateRepeart(Date checkStartDate,Date checkEndtDate,Date startDate,Date endDate){
		if(checkStartDate.getTime()==startDate.getTime() ||checkStartDate.getTime()==endDate.getTime()){
			return true;
		}
		if(checkEndtDate.getTime()==startDate.getTime() ||checkEndtDate.getTime()==endDate.getTime()){
			return true;
		}
		if(checkStartDate.getTime()>startDate.getTime() &&  checkStartDate.getTime()<endDate.getTime()){
			return true;
		}
		if(checkEndtDate.getTime()>startDate.getTime() &&  checkEndtDate.getTime()<endDate.getTime()){
			return true;
		}
		return false;
	}
	
	//得到本月的第一天
	public static String getMonthFirstDay() {
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
		SimpleDateFormat firstDay= new SimpleDateFormat("yyyy-MM-dd");
		return  firstDay.format(calendar.getTime());
	}
	
	//得到本月的最后一天
	public static String getMonthLastDay() {
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
		SimpleDateFormat lastDay= new SimpleDateFormat("yyyy-MM-dd");
		return  lastDay.format(calendar.getTime());
	}
	
	// 得到上月的第一天
	public static String getPerMonthFirstDay() {
		Calendar cal = Calendar.getInstance();
		// 上个月
		cal.add(Calendar.MONTH, -1);
		// 设置为1号,当前日期既为本月第一天
		cal.set(Calendar.DAY_OF_MONTH, 1);
		SimpleDateFormat sm = new SimpleDateFormat("yyyy-MM-dd");
		String firstDay = sm.format(cal.getTime());
		return firstDay;
	}

	// 得到上月的最后一天
	public static String getPerMonthLastDay() {
		Calendar call = Calendar.getInstance();
		// 设置上个月最后一天
		call.set(Calendar.DAY_OF_MONTH, 0);
		SimpleDateFormat sm = new SimpleDateFormat("yyyy-MM-dd");
		String lastDay = sm.format(call.getTime());
		return lastDay;
	}



    // 得到下个月的第一天
    public static String getNextMonthFirstDate(String dateStr){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String nextMonthFirstDate = "";
        try {
            Date date = sdf.parse(dateStr);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            calendar.add(Calendar.MONTH, 1);
            nextMonthFirstDate = sdf.format(calendar.getTime());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return nextMonthFirstDate;
    }