TimeUtil获取各种日期和时间

ゝ一世哀愁。 2022-08-21 04:52 284阅读 0赞

package com.imooc.test;
    
    
    import java.text.DateFormat;  
    import java.text.ParsePosition;  
    import java.text.SimpleDateFormat;  
    import java.util.Calendar;  
    import java.util.Date;  
    import java.util.GregorianCalendar;  
      
    public class TimeUtil {  
        //用来全局控制 上一周，本周，下一周的周数变化  
        private  int weeks = 0;  
        private int MaxDate;//一月最大天数  
        private int MaxYear;//一年最大天数  
          
          
        /** 
         * @param args 
         */  
        public static void main(String[] args) {  
        	TimeUtil tt = new TimeUtil();  
            System.out.println("获取当天日期:"+tt.getNowTime("yyyy-MM-dd"));  
            System.out.println("获取本周一日期:"+tt.getMondayOFWeek());  
            System.out.println("获取本周日的日期:"+tt.getCurrentWeekday());  
            System.out.println("获取上周一日期:"+tt.getPreviousWeekday());  
            System.out.println("获取上周日日期:"+tt.getPreviousWeekSunday());  
            System.out.println("获取下周一日期:"+tt.getNextMonday());  
            System.out.println("获取下周日日期:"+tt.getNextSunday());  
            System.out.println("获得相应周的周六的日期:"+tt.getNowTime("yyyy-MM-dd"));  
            System.out.println("获取本月第一天日期:"+tt.getFirstDayOfMonth());  
            System.out.println("获取本月最后一天日期:"+tt.getDefaultDay());  
            System.out.println("获取上月第一天日期:"+tt.getPreviousMonthFirst());  
            System.out.println("获取上月最后一天的日期:"+tt.getPreviousMonthEnd());  
            System.out.println("获取下月第一天日期:"+tt.getNextMonthFirst());  
            System.out.println("获取下月最后一天日期:"+tt.getNextMonthEnd());  
            System.out.println("获取本年的第一天日期:"+tt.getCurrentYearFirst());  
            System.out.println("获取本年最后一天日期:"+tt.getCurrentYearEnd());  
            System.out.println("获取去年的第一天日期:"+tt.getPreviousYearFirst());  
            System.out.println("获取去年的最后一天日期:"+tt.getPreviousYearEnd());  
            System.out.println("获取明年第一天日期:"+tt.getNextYearFirst());  
            System.out.println("获取明年最后一天日期:"+tt.getNextYearEnd());  
            System.out.println("获取本季度第一天到最后一天:"+tt.getThisSeasonTime(11));  
            System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9-29:"+TimeUtil.getTwoDay("2008-12-1","2008-9-29"));  
            System.out.println(getWeek("2015-9-15"));
            System.out.println(tt.getMonthPlus());
        }  
          
          
        /** 
            * 得到二个日期间的间隔天数 
            */  
        public static String getTwoDay(String sj1, String sj2) {  
            SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");  
            long day = 0;  
            try {  
             java.util.Date date = myFormatter.parse(sj1);  
             java.util.Date mydate = myFormatter.parse(sj2);  
             day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);  
            } catch (Exception e) {  
             return "";  
            }  
            return day + "";  
        }  
      
      
        /** 
            * 根据一个日期，返回是星期几的字符串 
            *  
            * @param sdate 
            * @return 
            */  
        public static String getWeek(String sdate) {  
            // 再转换为时间  
            Date date = TimeUtil.strToDate(sdate);  
            Calendar c = Calendar.getInstance();  
            c.setTime(date);  
            // int hour=c.get(Calendar.DAY_OF_WEEK);  
            // hour中存的就是星期几了，其范围 1~7  
            // 1=星期日 7=星期六，其他类推  
            return new SimpleDateFormat("EEEE").format(c.getTime());  
        }  
      
        /** 
            * 将短时间格式字符串转换为时间 yyyy-MM-dd  
            *  
            * @param strDate 
            * @return 
            */  
        public static Date strToDate(String strDate) {  
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");  
            ParsePosition pos = new ParsePosition(0);  
            Date strtodate = formatter.parse(strDate, pos);  
            return strtodate;  
        }  
      
        /** 
            * 两个时间之间的天数 
            *  
            * @param date1 
            * @param date2 
            * @return 
            */  
        public static long getDays(String date1, String date2) {  
            if (date1 == null || date1.equals(""))  
             return 0;  
            if (date2 == null || date2.equals(""))  
             return 0;  
            // 转换为标准时间  
            SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");  
            java.util.Date date = null;  
            java.util.Date mydate = null;  
            try {  
             date = myFormatter.parse(date1);  
             mydate = myFormatter.parse(date2);  
            } catch (Exception e) {  
            }  
            long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);  
            return day;  
        }  
      
      
      
          
        // 计算当月最后一天,返回字符串  
        public String getDefaultDay(){    
           String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
           lastDate.set(Calendar.DATE,1);//设为当前月的1号  
           lastDate.add(Calendar.MONTH,1);//加一个月，变为下月的1号  
           lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天  
             
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
        // 上月第一天  
        public String getPreviousMonthFirst(){    
           String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
           lastDate.set(Calendar.DATE,1);//设为当前月的1号  
           lastDate.add(Calendar.MONTH,-1);//减一个月，变为下月的1号  
           //lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天  
             
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
        //获取当月第一天  
        public String getFirstDayOfMonth(){    
           String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
           lastDate.set(Calendar.DATE,1);//设为当前月的1号  
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
        // 获得本周星期日的日期    
        public String getCurrentWeekday() {  
            weeks = 0;  
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus+6);  
            Date monday = currentDate.getTime();  
              
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
          
          
        //获取当天时间   
        public String getNowTime(String dateformat){  
            Date   now   =   new   Date();     
            SimpleDateFormat   dateFormat   =   new   SimpleDateFormat(dateformat);//可以方便地修改日期格式     
            String  hehe  = dateFormat.format(now);     
            return hehe;  
        }  
          
        // 获得当前日期与本周日相差的天数  
        private int getMondayPlus() {  
            Calendar cd = Calendar.getInstance();  
            // 获得今天是一周的第几天，星期日是第一天，星期二是第二天......  
            int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK)-1;         //因为按中国礼拜一作为第一天所以这里减1  
            if (dayOfWeek == 1) {  
                return 0;  
            } else {  
                return 1 - dayOfWeek;  
            }  
        }  
          
        //获得本周一的日期  
        public String getMondayOFWeek(){  
             weeks = 0;  
             int mondayPlus = this.getMondayPlus();  
             GregorianCalendar currentDate = new GregorianCalendar();  
             currentDate.add(GregorianCalendar.DATE, mondayPlus);  
             Date monday = currentDate.getTime();  
               
             DateFormat df = DateFormat.getDateInstance();  
             String preMonday = df.format(monday);  
             return preMonday;  
        }  
          
      //获得相应周的周六的日期  
        public String getSaturday() {  
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6);  
            Date monday = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
          
     // 获得上周星期日的日期  
        public String getPreviousWeekSunday() {  
            weeks=0;  
            weeks--;  
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus+weeks);  
            Date monday = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
      
     // 获得上周星期一的日期  
        public String getPreviousWeekday() {  
            weeks--;  
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks);  
            Date monday = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
          
        // 获得下周星期一的日期  
        public String getNextMonday() {  
            weeks++;  
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);  
            Date monday = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
          
     // 获得下周星期日的日期  
        public String getNextSunday() {  
              
            int mondayPlus = this.getMondayPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE, mondayPlus + 7+6);  
            Date monday = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preMonday = df.format(monday);  
            return preMonday;  
        }  
          
          
          
        private int getMonthPlus(){  
            Calendar cd = Calendar.getInstance();  
            int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);  
            cd.set(Calendar.DATE, 1);//把日期设置为当月第一天   
            cd.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天   
            MaxDate=cd.get(Calendar.DATE);   
            if(monthOfNumber == 1){  
                return -MaxDate;  
            }else{  
                return 1-monthOfNumber;  
            }  
        }  
          
      //获得上月最后一天的日期  
        public String getPreviousMonthEnd(){  
            String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
          lastDate.add(Calendar.MONTH,-1);//减一个月  
          lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天   
          lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天   
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
      //获得下个月第一天的日期  
        public String getNextMonthFirst(){  
            String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
          lastDate.add(Calendar.MONTH,1);//减一个月  
          lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天   
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
      //获得下个月最后一天的日期  
        public String getNextMonthEnd(){  
            String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
           Calendar lastDate = Calendar.getInstance();  
          lastDate.add(Calendar.MONTH,1);//加一个月  
          lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天   
          lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天   
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
        //获得明年最后一天的日期  
        public String getNextYearEnd(){  
            String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
          Calendar lastDate = Calendar.getInstance();  
          lastDate.add(Calendar.YEAR,1);//加一个年  
          lastDate.set(Calendar.DAY_OF_YEAR, 1);  
         lastDate.roll(Calendar.DAY_OF_YEAR, -1);  
           str=sdf.format(lastDate.getTime());  
           return str;    
        }  
          
      //获得明年第一天的日期  
        public String getNextYearFirst(){  
            String str = "";  
           SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");      
      
          Calendar lastDate = Calendar.getInstance();  
          lastDate.add(Calendar.YEAR,1);//加一个年  
          lastDate.set(Calendar.DAY_OF_YEAR, 1);  
               str=sdf.format(lastDate.getTime());  
          return str;    
              
        }  
          
      //获得本年有多少天  
        private int getMaxYear(){  
            Calendar cd = Calendar.getInstance();  
            cd.set(Calendar.DAY_OF_YEAR,1);//把日期设为当年第一天  
            cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滚一天。  
            int MaxYear = cd.get(Calendar.DAY_OF_YEAR);   
            return MaxYear;  
        }  
          
        private int getYearPlus(){  
            Calendar cd = Calendar.getInstance();  
            int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);//获得当天是一年中的第几天  
            cd.set(Calendar.DAY_OF_YEAR,1);//把日期设为当年第一天  
            cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滚一天。  
            int MaxYear = cd.get(Calendar.DAY_OF_YEAR);  
            if(yearOfNumber == 1){  
                return -MaxYear;  
            }else{  
                return 1-yearOfNumber;  
            }  
        }  
      //获得本年第一天的日期  
        public String getCurrentYearFirst(){  
            int yearPlus = this.getYearPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE,yearPlus);  
            Date yearDay = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preYearDay = df.format(yearDay);  
            return preYearDay;  
        }  
          
          
      //获得本年最后一天的日期 *  
        public String getCurrentYearEnd(){  
            Date date = new Date();  
            SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式     
            String  years  = dateFormat.format(date);     
            return years+"-12-31";  
        }  
          
          
      //获得上年第一天的日期 *  
        public String getPreviousYearFirst(){  
            Date date = new Date();  
            SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式     
            String  years  = dateFormat.format(date); int years_value = Integer.parseInt(years);    
            years_value--;  
            return years_value+"-1-1";  
        }  
          
      //获得上年最后一天的日期  
        public String getPreviousYearEnd(){  
            weeks--;  
            int yearPlus = this.getYearPlus();  
            GregorianCalendar currentDate = new GregorianCalendar();  
            currentDate.add(GregorianCalendar.DATE,yearPlus+MaxYear*weeks+(MaxYear-1));  
            Date yearDay = currentDate.getTime();  
            DateFormat df = DateFormat.getDateInstance();  
            String preYearDay = df.format(yearDay);  
            getThisSeasonTime(11);  
            return preYearDay;  
        }  
          
      //获得本季度  
        public String getThisSeasonTime(int month){  
            int array[][] = {
       {1,2,3},{4,5,6},{7,8,9},{10,11,12}};  
            int season = 1;  
            if(month>=1&&month<=3){  
                season = 1;  
            }  
            if(month>=4&&month<=6){  
                season = 2;  
            }  
            if(month>=7&&month<=9){  
                season = 3;  
            }  
            if(month>=10&&month<=12){  
                season = 4;  
            }  
            int start_month = array[season-1][0];  
            int end_month = array[season-1][2];  
              
            Date date = new Date();  
            SimpleDateFormat   dateFormat   =   new   SimpleDateFormat("yyyy");//可以方便地修改日期格式     
            String  years  = dateFormat.format(date);     
            int years_value = Integer.parseInt(years);  
              
            int start_days =1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);  
            int end_days = getLastDayOfMonth(years_value,end_month);  
            String seasonDate = years_value+"-"+start_month+"-"+start_days+";"+years_value+"-"+end_month+"-"+end_days;  
            return seasonDate;  
              
        }  
          
        /** 
         * 获取某年某月的最后一天 
         * @param year 年 
         * @param month 月 
         * @return 最后一天 
         */  
       private 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 
        * @param year 年 
        * @return  
        */  
      public boolean isLeapYear(int year) {  
            return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);  
      }  
    }