java关于时间处理的工具类

深藏阁楼爱情的钟 2022-02-26 07:36 246阅读 0赞

package sy.util.base;
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.*;
    
    public class DateUtil {
    
    	public static void main(String[] args) {
    		String a="123,234";
    		String[] b=a.split(",");
    		System.out.println(b[1]);
    	}
    
    	/**
    	 * 日期转字符串
    	 * 
    	 * @param date
    	 *            日期
    	 * @param pattern
    	 *            格式
    	 * @return
    	 */
    	public static String dateToString(Date date, String pattern) {
    		if (date != null) {
    			SimpleDateFormat sdf = new SimpleDateFormat(pattern);
    			return sdf.format(date);
    		}
    		return "";
    	}
    
    	/**
    	 * 日期转字符串
    	 * 
    	 * @param date
    	 * @return
    	 */
    	public static String dateToString(Date date) {
    		return dateToString(date, "yyyy-MM-dd hh:mm:ss");
    	}
    	public static String dateToStrings(Date date) {
    		return dateToString(date, "yyyy-MM-dd")+" ";
    	}
    	 private  static final SimpleDateFormat longDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
         
    	    private  static final SimpleDateFormat shortDateFormat = new SimpleDateFormat("yyyy-MM-dd");  
    	      
    	    /** 
    	     * 根据一个日期，返回是星期几的字符串 
    	     */  
    	    private static String getWeek (String strDate) {  
    	        // 再转换为时间  
    	        Date date = null;  
    	        try {  
    	            date = shortDateFormat.parse(strDate);  
    	        } catch (ParseException e) {  
    	            e.printStackTrace();  
    	        }  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.setTime(date);  
    	          
    	        return new SimpleDateFormat("EEEE").format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取当天(短日期类型) 
    	     */  
    	    public static String getShortToday () {
    	        Date today = new Date();  
    	        return shortDateFormat.format(today);   
    	    }
    	    /**
    	    * 取明天(短日期类型)
    	     */
    	    public static String getShortTomorrow (){
    			Date date=new Date();//取时间
    			Calendar calendar = new GregorianCalendar();
    			calendar.setTime(date);
    			calendar.add(calendar.DATE,1);//把日期往后增加一天.整数往后推,负数往前移动
    			date=calendar.getTime(); //这个时间就是日期往后推一天的结果
    			SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
    			String dateString = formatter.format(date);
    			return  dateString;
    		}
    
    	    /** 
    	     * 取当天(长日期类型) 
    	     */  
    	    private static String getLongToday () {  
    	        Date today = new Date();  
    	        return longDateFormat.format(today);   
    	    }  
    	      
    	    /** 
    	     * 取当天零点零分零秒 
    	     */  
    	    public static String getTodayStart () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        //如果没有这种设定的话回去系统的当期的时间  
    	        calendar.set(Calendar.HOUR_OF_DAY, 0);  
    	        calendar.set(Calendar.MINUTE, 0);  
    	        calendar.set(Calendar.SECOND, 0);  
    	        calendar.set(Calendar.MILLISECOND, 0);  
    	        Date date = new Date(calendar.getTimeInMillis());  
    	        return longDateFormat.format(date);  
    	    }     
    	  
    	    /** 
    	     * 取当天23点59分59秒 
    	     */  
    	    public static String getTodayEnd () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.set(Calendar.HOUR_OF_DAY, 23);   
    	        calendar.set(Calendar.MINUTE, 59);  
    	        calendar.set(Calendar.SECOND, 59);  
    	        Date date = new Date(calendar.getTimeInMillis());  
    	        return longDateFormat.format(date);  
    	    }     
    	  
    	    /** 
    	     * 取特定日期的零点零分零秒 
    	     */  
    	    public static String getDateStart (String strDate) {  
    	        if (null == strDate || "".equals(strDate.trim())) {  
    	            return "";  
    	        }  
    	        Date date = null;  
    	        try {  
    	            date = shortDateFormat.parse(strDate);  
    	        } catch (ParseException e) {  
    	            e.printStackTrace();  
    	        }  
    	        return longDateFormat.format(date);  
    	    }  
    	      
    	    /** 
    	     * 取特定日期的59分59秒 
    	     */  
    	    public static String getDateEnd (String strDate) {  
    	        if (null == strDate || "".equals(strDate.trim())) {  
    	            return "";  
    	        }  
    	        Date date = null;  
    	        try {  
    	            date = shortDateFormat.parse(strDate);  
    	        } catch (ParseException e) {  
    	            e.printStackTrace();  
    	        }  
    	  
    	        //这样能够取到59分59秒  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.setTime(date);  
    	        calendar.set(Calendar.HOUR_OF_DAY, 23);  
    	        calendar.set(Calendar.MINUTE, 59);  
    	        calendar.set(Calendar.SECOND, 59);  
    	        calendar.set(Calendar.MILLISECOND, 0);  
    	          
    	        return longDateFormat.format(calendar.getTime());  
    	    }  
    	  
    	    /** 
    	     * 取当周周一 
    	     */  
    	    private static String getMondayOfThisWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  
    	        /*calendar.set(Calendar.HOUR_OF_DAY, 0); 
    	        calendar.set(Calendar.MINUTE, 0); 
    	        calendar.set(Calendar.SECOND, 0); 
    	        calendar.set(Calendar.MILLISECOND, 0);*/  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取当周周日 
    	     */  
    	    private static String getSundayOfThisWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  
    	        /*calendar.set(Calendar.HOUR_OF_DAY, 0); 
    	        calendar.set(Calendar.MINUTE, 0); 
    	        calendar.set(Calendar.SECOND, 0); 
    	        calendar.set(Calendar.MILLISECOND, 0);*/  
    	        //以上取得的是周一  
    	        calendar.add(Calendar.DATE, 6);  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取上周周一 
    	     */  
    	    private static String getMondayOfPreviousWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  
    	        calendar.add(Calendar.DATE, -7);  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取上周周日 
    	     */  
    	    private static String getSundayOfPreviousWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  
    	        calendar.add(Calendar.DATE, -1);  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取下周周一 
    	     */  
    	    private static String getMondayOfNextWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  // 当周周一  
    	        calendar.add(Calendar.DATE, 7);  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取下周周日 
    	     */  
    	    private static String getSundayOfNextWeek () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        int day_of_week = calendar.get(Calendar.DAY_OF_WEEK) - 1;  
    	        if (day_of_week == 0){  
    	            day_of_week = 7;  
    	        }  
    	        calendar.add(Calendar.DATE, -day_of_week + 1);  // 当周周一  
    	        calendar.add(Calendar.DATE, 13);  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取当月1号 
    	     */
    		public static String getFirstDayOfThisMonth () {
    	         Calendar calendar = Calendar.getInstance();    
    	         calendar.set(Calendar.DATE, 1);    // 设为当前月的1号    
    	         return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取当月最后一天 
    	     */
    		public static String getLastDayOfThisMonth () {
    	         Calendar calendar = Calendar.getInstance();    
    	         calendar.set(Calendar.DATE, 1);    // 设为当前月的1号    
    	         calendar.add(Calendar.MONTH, 1);   // 加一个月，变为下月的1号  
    	         calendar.add(Calendar.DATE, -1);   // 减去一天，变为当月最后一天  
    	         return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取上月1号 
    	     */  
    	    public static String getFirstDayOfPreviousMonth() {
    	         Calendar calendar = Calendar.getInstance();    
    	         calendar.set(Calendar.DATE, 1);    // 设为当前月的1号    
    	         calendar.add(Calendar.MONTH, -1);  // 减一个月，变为上月的1号  
    	         return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取上月最后一天 
    	     */
    		public static String getLastDayOfPreviousMonth () {
    	         Calendar calendar = Calendar.getInstance();    
    	         calendar.set(Calendar.DATE, 1);    // 设为当前月的1号    
    	         calendar.add(Calendar.DATE, -1);   // 减去一天，变为上月最后一天  
    	         return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取下月1号 
    	     */  
    	    private static String getFirstDayOfNextMonth () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.add(Calendar.MONTH, 1);    // 加一个月  
    	        calendar.set(Calendar.DATE, 1);     // 把日期设置为当月第一天  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 取下月最后一天 
    	     */  
    	    private static String getLastDayOfNextMonth () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.add(Calendar.MONTH, 1);// 加一个月  
    	        calendar.set(Calendar.DATE, 1);// 把日期设置为当月第一天  
    	        calendar.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天  
    	        return shortDateFormat.format(calendar.getTime());  
    	    }  
    	      
    	    /** 
    	     * 获得本年有多少天 
    	     */  
    	    private static int getTotalDaysOfThisYear() {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天  
    	        calendar.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。  
    	        int totalDays = calendar.get(Calendar.DAY_OF_YEAR);  
    	        return totalDays;  
    	    }  
    	      
    	    /** 
    	     * 获取某年某月的最后一天 
    	     */  
    	    private static int getLastDayOfMonth (int year, int month) {  
    	        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {  
    	            return 31;  
    	        }  
    	        if (month == 4 || month == 6 || month == 9 || month == 11) {  
    	            return 30;  
    	        }  
    	        if (month == 2) {  
    	            if (isLeapYear(year)) {  
    	                return 29;  
    	            } else {  
    	                return 28;  
    	            }  
    	        }  
    	        return 0;  
    	    }  
    	  
    	    /** 
    	     * 是否闰年 
    	     */  
    	    public static boolean isLeapYear (int year) {  
    	        return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);  
    	    }  
    	      
    	  
    	    /** 
    	     * 获得本年第一天的日期 
    	     */  
    	    public static String getFirstDayOfThisYear () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.set(Calendar.MONTH, 1);  
    	        calendar.set(Calendar.DAY_OF_YEAR, 1);  
    	        Date date = new Date(calendar.getTimeInMillis());  
    	        return shortDateFormat.format(date);  
    	    }  
    	  
    	    /** 
    	     *  获得本年最后一天的日期 
    	     */  
    	    public static String getLastDayOfThisYear () {  
    	        Date date = new Date();  
    	        String years = new SimpleDateFormat("yyyy").format(date);  
    	        return years + "-12-31";  
    	    }  
    	      
    	    /** 
    	     *  获得上年第一天的日期 * 
    	     */  
    	    public static String getFirstDayOfPreviousYear () {  
    	        Calendar calendar = Calendar.getInstance();  
    	        calendar.add(Calendar.YEAR, -1);    // 若是 明年改为正整数1即可  
    	        calendar.set(Calendar.MONTH, 1);  
    	        calendar.set(Calendar.DAY_OF_YEAR, 1);  
    	        Date date = new Date(calendar.getTimeInMillis());  
    	        return shortDateFormat.format(date);  
    	    }  
    	      
    	    /** 
    	     * 两个时间之间的天数 
    	     */  
    	    public static long getDays (String date1, String date2) {  
    	        if (date1 == null || "".equals(date1.trim())) {  
    	            return 0;  
    	        }  
    	        if (date2 == null || "".equals(date2.trim())) {  
    	            return 0;  
    	        }  
    	        // 转换为标准时间  
    	        Date date = null;  
    	        Date mydate = null;  
    	        try {  
    	            date = shortDateFormat.parse(date1);  
    	            mydate = shortDateFormat.parse(date2);  
    	        } catch (Exception e) {  
    	            e.printStackTrace();  
    	        }  
    	        long day = 0;  
    	        if (date.before(mydate)) {  
    	            day = (mydate.getTime() - date.getTime()) / (24 * 60 * 60 * 1000);  
    	        } else {  
    	            day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);  
    	        }  
    	        return day;  
    	    }
    
    	/**
    	 * 获取某个时间后的某前后几天
    	 * 返回结果为yyyy-mm-dd
    	 */
    	public static Date beforeorafterDays(Date inputDate,int changeDate){
    		String result="";
    		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    		Calendar   calendar   =   new GregorianCalendar();
    		calendar.setTime(inputDate);
    		calendar.add(calendar.DATE,changeDate);
    		inputDate=calendar.getTime();
    		result=format.format(inputDate);
    		try {
    			inputDate = format.parse(result);
    		} catch (ParseException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		return inputDate;
    
    	}
    
    	/**
    	 * 获取当前日期是星期几<br>
    	 *
    	 * @param date
    	 * @return 当前日期是星期几
    	 */
    	public static int getWeekOfDate(Date date) {
    		//String[] weekDays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
    		Calendar cal = Calendar.getInstance();
    		cal.setTime(date);
    		int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
    		if (w < 0)
    			w = 0;
    		//return weekDays[w];
    		return w;
    	}
    	/**
    	 * 获取当前时间加分钟数
    	 *
    	 * @param minutes
    	 * @return
    	 */
    	public static String addNowDate(Integer minutes) {
    		Calendar nowTime = Calendar.getInstance();
    
    		nowTime.add(Calendar.MINUTE, minutes);
    		return dateToString(nowTime.getTime(),"yyyy-MM-dd HH:mm:ss");
    	}
    }