dwz_spring.rar_dwz

/* * 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 dwz.common.util.time; import java.text.ParseException; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.Iterator; import java.util.NoSuchElementException; import java.util.TimeZone; import dwz.common.util.StringUtils; /** * 常用日期工具 * <p>A suite of utilities surrounding the use of the * {@link java.util.Calendar} and {@link java.util.Date} object.</p> * * <p>DateUtils contains a lot of common methods considering manipulations * of Dates or Calendars. Some methods require some extra explanation. * The truncate, ceiling and round methods could be considered the Math.floor(), * Math.ceil() or Math.round versions for dates * This way date-fields will be ignored in bottom-up order. * As a complement to these methods we've introduced some fragment-methods. * With these methods the Date-fields will be ignored in top-down order. * Since a date without a year is not a valid date, you have to decide in what * kind of date-field you want your result, for instance milliseconds or days. * </p> * * * * @author Apache Software Foundation * @author <a href="mailto:sergek@lokitech.com">Serge Knystautas</a> * @author Janek Bogucki * @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a> * @author Phil Steitz * @author Robert Scholte * @since 2.0 * @version $Id: DateUtils.java 911986 2010-02-19 21:19:05Z niallp $ */ public class DateUtils { /** * The UTC time zone (often referred to as GMT). */ public static final TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone("GMT"); /** * Number of milliseconds in a standard second. * @since 2.1 */ public static final long MILLIS_PER_SECOND = 1000; /** * Number of milliseconds in a standard minute. * @since 2.1 */ public static final long MILLIS_PER_MINUTE = 60 * MILLIS_PER_SECOND; /** * Number of milliseconds in a standard hour. * @since 2.1 */ public static final long MILLIS_PER_HOUR = 60 * MILLIS_PER_MINUTE; /** * Number of milliseconds in a standard day. * @since 2.1 */ public static final long MILLIS_PER_DAY = 24 * MILLIS_PER_HOUR; /** * This is half a month, so this represents whether a date is in the top * or bottom half of the month. */ public final static int SEMI_MONTH = 1001; private static final int[][] fields = { {Calendar.MILLISECOND}, {Calendar.SECOND}, {Calendar.MINUTE}, {Calendar.HOUR_OF_DAY, Calendar.HOUR}, {Calendar.DATE, Calendar.DAY_OF_MONTH, Calendar.AM_PM /* Calendar.DAY_OF_YEAR, Calendar.DAY_OF_WEEK, Calendar.DAY_OF_WEEK_IN_MONTH */ }, {Calendar.MONTH, DateUtils.SEMI_MONTH}, {Calendar.YEAR}, {Calendar.ERA}}; /** * A week range, starting on Sunday. */ public final static int RANGE_WEEK_SUNDAY = 1; /** * A week range, starting on Monday. */ public final static int RANGE_WEEK_MONDAY = 2; /** * A week range, starting on the day focused. */ public final static int RANGE_WEEK_RELATIVE = 3; /** * A week range, centered around the day focused. */ public final static int RANGE_WEEK_CENTER = 4; /** * A month range, the week starting on Sunday. */ public final static int RANGE_MONTH_SUNDAY = 5; /** * A month range, the week starting on Monday. */ public final static int RANGE_MONTH_MONDAY = 6; /** * Constant marker for truncating */ private final static int MODIFY_TRUNCATE = 0; /** * Constant marker for rounding */ private final static int MODIFY_ROUND = 1; /** * Constant marker for ceiling */ private final static int MODIFY_CEILING= 2; /** * <p><code>DateUtils</code> instances should NOT be constructed in * standard programming. Instead, the class should be used as * <code>DateUtils.parse(str);</code>.</p> * * <p>This constructor is public to permit tools that require a JavaBean * instance to operate.</p> */ public DateUtils() { super(); } //----------------------------------------------------------------------- /** * <p>Checks if two date objects are on the same day ignoring time.</p> * * <p>28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true. * 28 Mar 2002 13:45 and 12 Mar 2002 13:45 would return false. * </p> * * @param date1 the first date, not altered, not null * @param date2 the second date, not altered, not null * @return true if they represent the same day * @throws IllegalArgumentException if either date is <code>null</code> * @since 2.1 */ public static boolean isSameDay(Date date1, Date date2) { if (date1 == null || date2 == null) { throw new IllegalArgumentException("The date must not be null"); } Calendar cal1 = Calendar.getInstance(); cal1.setTime(date1); Calendar cal2 = Calendar.getInstance(); cal2.setTime(date2); return isSameDay(cal1, cal2); } /** * <p>Checks if two calendar objects are on the same day ignoring time.</p> * * <p>28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true. * 28 Mar 2002 13:45 and 12 Mar 2002 13:45 would return false. * </p> * * @param cal1 the first calendar, not altered, not null * @param cal2 the second calendar, not altered, not null * @return true if they represent the same day * @throws IllegalArgumentException if either calendar is <code>null</code> * @since 2.1 */ public static boolean isSameDay(Calendar cal1, Calendar cal2) { if (cal1 == null || cal2 == null) { throw new IllegalArgumentException("The date must not be null"); } return (cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA) && cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) && cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR)); } //----------------------------------------------------------------------- /** * <p>Checks if two date objects represent the same instant in time.</p> * * <p>This method compares the long millisecond time of the two objects.</p> * * @param date1 the first date, not altered, not null * @param date2 the second date, not altered, not null * @return true if they represent the same millisecond instant * @throws IllegalArgumentException if either date is <code>null</code> * @since 2.1 */ public static boolean isSameInstant(Date date1, Date date2) { if (date1 == null || date2 == null) { throw new IllegalArgumentException("The date must not be null"); } return date1.getTime() == date2.getTime(); } /** * <p>Checks if two calendar objects represent the same instant in time.</p> * * <p>This method compares the long millisecond time of