content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.jstorm.utils;
  
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Date;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author longda
   */
  public class TimeFormat {
      public static Logger log = LoggerFactory.getLogger(TimeFormat.class);
  
      public static final long ONE_SECOND_MILLISECONDS = 1000;
  
      public static final long ONE_MINUTE_SECONDS = 60;
  
      public static final long ONE_HOUR_MINUTES = 60;
  
      public static final long ONE_DAY_HOURS = 24;
  
      public static final long ONE_MINUTE_MILLISECONDS = ONE_MINUTE_SECONDS * ONE_SECOND_MILLISECONDS;
  
      public static final long ONE_HOUR_MILLISECONDS = ONE_HOUR_MINUTES * ONE_MINUTE_MILLISECONDS;
  
      public static Date convertDate(String dateStr, String format) {
          Date date;
          try {
              if (format != null) {
                  SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
                  date = simpleDateFormat.parse(dateStr);
              } else {
                  date = new Date(dateStr);
              }
  
          } catch (Exception ex) {
              log.error("Failed to convert " + dateStr + " to Date, format:" + format);
              return null;
          }
          return date;
      }
  
      public static String convertStr(Date date, String format) {
          String ret;
          try {
  
              SimpleDateFormat sdf = new SimpleDateFormat(format);
  
              ret = sdf.format(date);
  
          } catch (Exception e) {
              log.error("Failed to convert " + date + " to String, format:" + format);
              return null;
          }
          return ret;
      }
  
      public static Date getYear(String dateStr) {
          return convertDate(dateStr, "yyyy");
      }
  
      public static String getYear(Date date) {
          return convertStr(date, "yyyy");
      }
  
      public static Date getMonth(String dateStr) {
          return convertDate(dateStr, "yyyyMM");
      }
  
      public static String getMonth(Date date) {
          return convertStr(date, "yyyyMM");
      }
  
      public static Date getDay(String dateStr) {
          return convertDate(dateStr, "yyyyMMdd");
      }
  
      public static String getDay(Date date) {
          return convertStr(date, "yyyyMMdd");
      }
  
      public static Date getHour(String dateStr) {
          return convertDate(dateStr, "yyyyMMddHH");
      }
  
      public static String getHour(Date date) {
          return convertStr(date, "yyyyMMddHH");
      }
  
      public static Date getMinute(String dateStr) {
          return convertDate(dateStr, "yyyyMMddHHmm");
      }
  
      public static String getMinute(Date date) {
          return convertStr(date, "yyyyMMddHHmm");
      }
  
      public static Date getSecond(String dateStr) {
          return convertDate(dateStr, "yyyyMMddHHmmss");
      }
  
      public static String getSecond(Date date) {
          return convertStr(date, "yyyyMMddHHmmss");
      }
  
      public static String getHourMin(String dateStr) {
          Date date = convertDate(dateStr, null);
          if (date == null) {
              return null;
          }
  
          return getHourMin(date);
      }
  
      public static String getHourMin(Date date) {
          String output;
          try {
              SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
              output = sdf.format(date);
          } catch (Exception e) {
              return null;
          }
          return output;
      }
  
      public static Date getToday() {
          Date now = new Date();
          String todayStr = getDay(now);
          return getDay(todayStr);
      }
  
      public static Date getYesterday() {
          Date now = new Date();
  
          Calendar yesterdayCal = Calendar.getInstance();
          yesterdayCal.setTime(now);
          yesterdayCal.add(Calendar.DATE, -1);
  
          String yesterdayStr = getDay(yesterdayCal.getTime());
          return getDay(yesterdayStr);
      }
  
      /**
       * get the days number pass from 1970-00-00
       */
      public static long getDayNum(Date date) {
          long passMs = date.getTime() + (8 * 1000 * 60 * 60);
          return (passMs / 1000 / 60 / 60 / 24);
      }
  
      public static void main(String[] args) {
          Date date = new Date();
  
          String dateStr = getDay(date);
  
          Date newDate = getDay(dateStr);
  
          System.out.println("new date:" + newDate);
  
          Date current = new Date();
          Calendar tomorrow = Calendar.getInstance();
  
          tomorrow.setTime(current);
          tomorrow.add(Calendar.DATE, 1);
          tomorrow.set(Calendar.AM_PM, Calendar.AM);
          tomorrow.set(Calendar.HOUR, 2);
          tomorrow.set(Calendar.MINUTE, 0);
          Date startTime = tomorrow.getTime();
  
          long hourdiff = (startTime.getTime() - current.getTime()) / ONE_HOUR_MILLISECONDS;
  
          System.out.println("Current:" + current + ", tomorrow" + startTime + ", diff hour" + hourdiff);
  
      }
  
  }
  