Java 日期工具类（今天、昨天、本周、上周、本月、上月、本年及特定时间的开始时间和结束时间）

Love The Way You Lie 2024-04-17 05:50 9阅读 0赞

*  timestamp格式的部分
    
        /** * 获取当天的开始时间 * @return Timestamp * @author LoveEmperor_王子様 * date: 2019/8/15 15:50 */
          public static Timestamp getDayBegin() { 
              Calendar cal = new GregorianCalendar();
              cal.set(Calendar.HOUR_OF_DAY, 0);
              cal.set(Calendar.MINUTE, 0);
              cal.set(Calendar.SECOND, 0);
              cal.set(Calendar.MILLISECOND, 0);
              return new Timestamp(cal.getTimeInMillis());
          }
        
          /** * 获取当天的结束时间 * @return Timestamp * @author LoveEmperor_王子様 * date: 2019/8/15 15:49 */
          public static Timestamp getDayEnd() { 
              Calendar cal = new GregorianCalendar();
              cal.set(Calendar.HOUR_OF_DAY, 23);
              cal.set(Calendar.MINUTE, 59);
              cal.set(Calendar.SECOND, 59);
              return new Timestamp(cal.getTimeInMillis());
          }
        
          /** * 获取昨天的开始时间 * @return Timestamp * @author LoveEmperor_王子様 * date: 2019/8/15 15:57 */
          public static Timestamp getBeginDayOfYesterday() { 
              Calendar cal = new GregorianCalendar();
              cal.setTime(getDayBegin());
              cal.add(Calendar.DAY_OF_MONTH, -1);
              return new Timestamp(cal.getTimeInMillis());
          }
        
          /** * 获取昨天的结束时间 * @return Timestamp * @author LoveEmperor_王子様 * date: 2019/8/15 15:57 */
          public static Timestamp getEndDayOfYesterday() { 
              Calendar cal = new GregorianCalendar();
              cal.setTime(getDayEnd());
              cal.add(Calendar.DAY_OF_MONTH, -1);
              return new Timestamp(cal.getTimeInMillis());
          }
 *  工具类代码
    
        import java.sql.Timestamp;
          import java.util.ArrayList;
           import java.util.Calendar;
           import java.util.Date;
           import java.util.GregorianCalendar;
           import java.util.List;
          
           public class DateUtils { 
          
               //获取当天的开始时间
               public static java.util.Date getDayBegin() { 
                   Calendar cal = new GregorianCalendar();
                   cal.set(Calendar.HOUR_OF_DAY, 0);
                   cal.set(Calendar.MINUTE, 0);
                   cal.set(Calendar.SECOND, 0);
                   cal.set(Calendar.MILLISECOND, 0);
                   return cal.getTime();
               }
               //获取当天的结束时间
               public static java.util.Date getDayEnd() { 
                   Calendar cal = new GregorianCalendar();
                   cal.set(Calendar.HOUR_OF_DAY, 23);
                   cal.set(Calendar.MINUTE, 59);
                   cal.set(Calendar.SECOND, 59);
                   return cal.getTime();
               }
               //获取昨天的开始时间
               public static Date getBeginDayOfYesterday() { 
                   Calendar cal = new GregorianCalendar();
                   cal.setTime(getDayBegin());
                   cal.add(Calendar.DAY_OF_MONTH, -1);
                   return cal.getTime();
               }
               //获取昨天的结束时间
               public static Date getEndDayOfYesterDay() { 
                   Calendar cal = new GregorianCalendar();
                   cal.setTime(getDayEnd());
                   cal.add(Calendar.DAY_OF_MONTH, -1);
                   return cal.getTime();
               }
               //获取明天的开始时间
               public static Date getBeginDayOfTomorrow() { 
                   Calendar cal = new GregorianCalendar();
                   cal.setTime(getDayBegin());
                   cal.add(Calendar.DAY_OF_MONTH, 1);
          
                   return cal.getTime();
               }
               //获取明天的结束时间
               public static Date getEndDayOfTomorrow() { 
                   Calendar cal = new GregorianCalendar();
                   cal.setTime(getDayEnd());
                   cal.add(Calendar.DAY_OF_MONTH, 1);
                   return cal.getTime();
               }
               //获取本周的开始时间
               @SuppressWarnings("unused")
              public static Date getBeginDayOfWeek() { 
                   Date date = new Date();
                   if (date == null) { 
                       return null;
                   }
                   Calendar cal = Calendar.getInstance();
                   cal.setTime(date);
                   int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
                   if (dayofweek == 1) { 
                       dayofweek += 7;
                   }
                   cal.add(Calendar.DATE, 2 - dayofweek);
                   return getDayStartTime(cal.getTime());
               }
               //获取本周的结束时间
               public static Date getEndDayOfWeek(){ 
                   Calendar cal = Calendar.getInstance();
                   cal.setTime(getBeginDayOfWeek());
                   cal.add(Calendar.DAY_OF_WEEK, 6);
                   Date weekEndSta = cal.getTime();
                   return getDayEndTime(weekEndSta);
               }
               //获取上周的开始时间
               @SuppressWarnings("unused")
               public static Date getBeginDayOfLastWeek() { 
                   Date date = new Date();
                   if (date == null) { 
                       return null;
                   }
                   Calendar cal = Calendar.getInstance();
                   cal.setTime(date);
                   int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
                   if (dayofweek == 1) { 
                       dayofweek += 7;
                   }
                   cal.add(Calendar.DATE, 2 - dayofweek - 7);
                   return getDayStartTime(cal.getTime());
               }
               //获取上周的结束时间
               public static Date getEndDayOfLastWeek(){ 
                   Calendar cal = Calendar.getInstance();
                   cal.setTime(getBeginDayOfLastWeek());
                   cal.add(Calendar.DAY_OF_WEEK, 6);
                   Date weekEndSta = cal.getTime();
                   return getDayEndTime(weekEndSta);
               }
               //获取本月的开始时间
                public static Date getBeginDayOfMonth() { 
                       Calendar calendar = Calendar.getInstance();
                       calendar.set(getNowYear(), getNowMonth() - 1, 1);
                       return getDayStartTime(calendar.getTime());
                   }
               //获取本月的结束时间
                public static Date getEndDayOfMonth() { 
                       Calendar calendar = Calendar.getInstance();
                       calendar.set(getNowYear(), getNowMonth() - 1, 1);
                       int day = calendar.getActualMaximum(5);
                       calendar.set(getNowYear(), getNowMonth() - 1, day);
                       return getDayEndTime(calendar.getTime());
                   }
                //获取上月的开始时间
                public static Date getBeginDayOfLastMonth() { 
                    Calendar calendar = Calendar.getInstance();
                    calendar.set(getNowYear(), getNowMonth() - 2, 1);
                    return getDayStartTime(calendar.getTime());
                }
                //获取上月的结束时间
                public static Date getEndDayOfLastMonth() { 
                    Calendar calendar = Calendar.getInstance();
                    calendar.set(getNowYear(), getNowMonth() - 2, 1);
                    int day = calendar.getActualMaximum(5);
                    calendar.set(getNowYear(), getNowMonth() - 2, day);
                    return getDayEndTime(calendar.getTime());
                }
                //获取本年的开始时间
                public static java.util.Date getBeginDayOfYear() { 
                       Calendar cal = Calendar.getInstance();
                       cal.set(Calendar.YEAR, getNowYear());
                       // cal.set
                       cal.set(Calendar.MONTH, Calendar.JANUARY);
                       cal.set(Calendar.DATE, 1);
          
                       return getDayStartTime(cal.getTime());
                   }
                //获取本年的结束时间
                public static java.util.Date getEndDayOfYear() { 
                       Calendar cal = Calendar.getInstance();
                       cal.set(Calendar.YEAR, getNowYear());
                       cal.set(Calendar.MONTH, Calendar.DECEMBER);
                       cal.set(Calendar.DATE, 31);
                       return getDayEndTime(cal.getTime());
                   }
               //获取某个日期的开始时间
               public static Timestamp getDayStartTime(Date d) { 
                   Calendar calendar = Calendar.getInstance();
                   if(null != d) calendar.setTime(d);
                   calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
                   calendar.set(Calendar.MILLISECOND, 0);
                   return new Timestamp(calendar.getTimeInMillis());
               }
               //获取某个日期的结束时间
               public static Timestamp getDayEndTime(Date d) { 
                   Calendar calendar = Calendar.getInstance();
                   if(null != d) calendar.setTime(d);
                   calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
                   calendar.set(Calendar.MILLISECOND, 999);
                   return new Timestamp(calendar.getTimeInMillis());
               }
               //获取今年是哪一年
                public static Integer getNowYear() { 
                        Date date = new Date();
                       GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
                       gc.setTime(date);
                       return Integer.valueOf(gc.get(1));
                   }
                //获取本月是哪一月
                public static int getNowMonth() { 
                        Date date = new Date();
                       GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
                       gc.setTime(date);
                       return gc.get(2) + 1;
                   }
                //两个日期相减得到的天数
                public static int getDiffDays(Date beginDate, Date endDate) { 
          
                       if (beginDate == null || endDate == null) { 
                           throw new IllegalArgumentException("getDiffDays param is null!");
                       }
          
                       long diff = (endDate.getTime() - beginDate.getTime())
                               / (1000 * 60 * 60 * 24);
          
                       int days = new Long(diff).intValue();
          
                       return days;
                   }
               //两个日期相减得到的毫秒数
                public static long dateDiff(Date beginDate, Date endDate) { 
                       long date1ms = beginDate.getTime();
                       long date2ms = endDate.getTime();
                       return date2ms - date1ms;
                   }
                //获取两个日期中的最大日期
                public static Date max(Date beginDate, Date endDate) { 
                       if (beginDate == null) { 
                           return endDate;
                       }
                       if (endDate == null) { 
                           return beginDate;
                       }
                       if (beginDate.after(endDate)) { 
                           return beginDate;
                       }
                       return endDate;
                   }
                //获取两个日期中的最小日期
                public static Date min(Date beginDate, Date endDate) { 
                       if (beginDate == null) { 
                           return endDate;
                       }
                       if (endDate == null) { 
                           return beginDate;
                       }
                       if (beginDate.after(endDate)) { 
                           return endDate;
                       }
                       return beginDate;
                   }
                //返回某月该季度的第一个月
                public static Date getFirstSeasonDate(Date date) { 
                        final int[] SEASON = {  1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 };
                       Calendar cal = Calendar.getInstance();
                       cal.setTime(date);
                       int sean = SEASON[cal.get(Calendar.MONTH)];
                       cal.set(Calendar.MONTH, sean * 3 - 3);
                       return cal.getTime();
                   }
                //返回某个日期下几天的日期
                public static Date getNextDay(Date date, int i) { 
                       Calendar cal = new GregorianCalendar();
                       cal.setTime(date);
                       cal.set(Calendar.DATE, cal.get(Calendar.DATE) + i);
                       return cal.getTime();
                   }
                //返回某个日期前几天的日期
                public static Date getFrontDay(Date date, int i) { 
                       Calendar cal = new GregorianCalendar();
                       cal.setTime(date);
                       cal.set(Calendar.DATE, cal.get(Calendar.DATE) - i);
                       return cal.getTime();
                   }
                //获取某年某月到某年某月按天的切片日期集合（间隔天数的集合）
                @SuppressWarnings({  "rawtypes", "unchecked" })
              public static List getTimeList(int beginYear, int beginMonth, int endYear,
                           int endMonth, int k) { 
                       List list = new ArrayList();
                       if (beginYear == endYear) { 
                           for (int j = beginMonth; j <= endMonth; j++) { 
                               list.add(getTimeList(beginYear, j, k));
          
                           }
                       } else { 
                           { 
                               for (int j = beginMonth; j < 12; j++) { 
                                   list.add(getTimeList(beginYear, j, k));
                               }
          
                               for (int i = beginYear + 1; i < endYear; i++) { 
                                   for (int j = 0; j < 12; j++) { 
                                       list.add(getTimeList(i, j, k));
                                   }
                               }
                               for (int j = 0; j <= endMonth; j++) { 
                                   list.add(getTimeList(endYear, j, k));
                               }
                           }
                       }
                       return list;
                   }
                //获取某年某月按天切片日期集合（某个月间隔多少天的日期集合）
                @SuppressWarnings({  "unchecked", "rawtypes" })
              public static List getTimeList(int beginYear, int beginMonth, int k) { 
                       List list = new ArrayList();
                       Calendar begincal = new GregorianCalendar(beginYear, beginMonth, 1);
                       int max = begincal.getActualMaximum(Calendar.DATE);
                       for (int i = 1; i < max; i = i + k) { 
                           list.add(begincal.getTime());
                           begincal.add(Calendar.DATE, k);
                       }
                       begincal = new GregorianCalendar(beginYear, beginMonth, max);
                       list.add(begincal.getTime());
                       return list;
                   }
          }
 *  调用
    
        import java.text.SimpleDateFormat;
        
          SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          
          String todayBegin = simpleDateFormat.format(DateUtils.getDayBegin());
          System.out.println(todayBegin );
          
          //输出结果为2017-10-26 00:00:00