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convert Strings to Dates and Timestamps and vice versa.
/*
* Copyright 2004 Blandware (http://www.blandware.com)
*
* Licensed 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.
*/
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.HashMap;
/**
* <p>Date Utility Class.
* This is used to convert Strings to Dates and Timestamps and vice versa.
* </p>
* <p><a href="DateUtil.java.html"><i>View Source</i></a>
* </p>
*
* @author Matt Raible <a href="mailto:matt@raibledesigns.com"><matt@raibledesigns.com></a>
* @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com"><sergey.zubtsovskiy@blandware.com></a>
* @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
* <roman.puchkovskiy@blandware.com></a>
* @version $Revision: 1.12 $ $Date: 2008/01/14 10:59:49 $
*/
public class DateUtil {
protected static String datePattern = "MM/dd/yyyy";
protected static HashMap patterns = new HashMap();
/**
* Formats given date according to specified locale and date style
*
* @param date Date to convert
* @param locale Locale to use for formatting date
* @param dateStyle Date style
* @return String representation of date according to given locale and date style
* @see java.text.DateFormat
*/
public static String formatDate(Date date, Locale locale, int dateStyle) {
DateFormat formatter = DateFormat.getDateInstance(dateStyle, locale);
return formatter.format(date);
}
/**
* Formats given date according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param date Date to convert
* @param locale Locale to use for formatting date
* @return String representation of date according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static String formatDate(Date date, Locale locale) {
return formatDate(date, locale, DateFormat.MEDIUM);
}
/**
* Parses given string according to specified locale and date style
*
* @param source Source string to parse date from
* @param locale Locale to use for parsing date
* @param dateStyle Date style
* @return Date object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and style
* @see java.text.DateFormat
*/
public static Date parseDate(String source, Locale locale, int dateStyle) throws ParseException {
DateFormat formatter = DateFormat.getDateInstance(dateStyle, locale);
return formatter.parse(source);
}
/**
* Parses given string according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param source Source string to parse date from
* @param locale Locale to use for parsing date
* @return Date object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static Date parseDate(String source, Locale locale) throws ParseException {
return parseDate(source, locale, DateFormat.MEDIUM);
}
/**
* Formats given time according to specified locale and time style
*
* @param time Time to convert
* @param locale Locale to use for formatting time
* @param timeStyle Time style
* @return String representation of time according to given locale and time style
* @see java.text.DateFormat
*/
public static String formatTime(Date time, Locale locale, int timeStyle) {
DateFormat formatter = DateFormat.getTimeInstance(timeStyle, locale);
return formatter.format(time);
}
/**
* Formats given time according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param time Time to convert
* @param locale Locale to use for formatting time
* @return String representation of time according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static String formatTime(Date time, Locale locale) {
return formatTime(time, locale, DateFormat.MEDIUM);
}
/**
* Parses given string according to specified locale and time style
*
* @param source Source string to parse time from
* @param locale Locale to use for parsing time
* @param timeStyle Time style
* @return Time object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and style
* @see java.text.DateFormat
*/
public static Date parseTime(String source, Locale locale, int timeStyle) throws ParseException {
DateFormat formatter = DateFormat.getTimeInstance(timeStyle, locale);
return formatter.parse(source);
}
/**
* Parses given string according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param source Source string to parse time from
* @param locale Locale to use for parsing time
* @return Time object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static Date parseTime(String source, Locale locale) throws ParseException {
return parseTime(source, locale, DateFormat.MEDIUM);
}
/**
* Formats given date and time according to specified locale and date style
*
* @param date Date object to convert
* @param locale Locale to use for formatting date and time
* @param dateStyle Date style
* @param timeStyle Time style
* @return String representation of date and time according to given locale and date style
* @see java.text.DateFormat
*/
public static String formatDateTime(Date date, Locale locale, int dateStyle, int timeStyle) {
DateFormat formatter = DateFormat.getDateTimeInstance(dateStyle, timeStyle, locale);
return formatter.format(date);
}
/**
* Formats given date and time according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param date Date object to convert
* @param locale Locale to use for formatting date and time
* @return String representation of date and time according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static String formatDateTime(Date date, Locale locale) {
return formatDateTime(date, locale, DateFormat.MEDIUM, DateFormat.MEDIUM);
}
/**
* Parses given string according to specified locale and date and time styles
*
* @param source Source string to parse date and time from
* @param locale Locale to use for parsing date and time
* @param dateStyle Date style
* @param timeStyle Time style
* @return Date object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and style
* @see java.text.DateFormat
*/
public static Date parseDateTime(String source, Locale locale, int dateStyle, int timeStyle) throws ParseException {
DateFormat formatter = DateFormat.getDateTimeInstance(dateStyle, timeStyle, locale);
return formatter.parse(source);
}
/**
* Parses given string according to specified locale and <code>DateFormat.MEDIUM</code> style
*
* @param source Source string to parse date and time from
* @param locale Locale to use for parsing date and time
* @return Date object corresponding to representation given in source string
* @throws ParseException if given string could not be properly parsed according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.DateFormat
* @see java.text.DateFormat#MEDIUM
*/
public static Date parseDateTime(String source, Locale locale) throws ParseException {
return parseDateTime(source, locale, DateFormat.MEDIUM, DateFormat.MEDIUM);
}
/**
* Formats given Date object according to specified locale and a given
* pattern.
*
* @param date Date object to convert
* @param locale Locale to use for formatting
* @param pattern Pattern to use
* @return String representation of date and time according to given locale and <code>DateFormat.MEDIUM</code> style
* @see java.text.SimpleDateFormat
*/
public static String format(Date date, Locale locale, String pattern) {
SimpleDateFormat formatter = new SimpleDateFormat(pattern, locale);
return formatter.format(date);
}
/**
* Parses given string according to specified locale and a given pattern.
*
* @param source Source string to parse date and time from
* @param locale Locale to use for parsing date and time
* @param pattern Pattern to use
* @return Date object corresponding to representation given in source
* string
* @throws ParseException if given string could not be properly parsed
* according to given locale and pattern
* @see java.text.SimpleDateFormat
*/
public static Date parse(String source, Locale locale, String pattern)
throws ParseException {
SimpleDateFormat formatter = new SimpleDateFormat(pattern, locale);
return formatter.parse(source);
}
/**
* Returns default datePattern (MM/dd/yyyy)
*
* @return a string representing the date pattern on the UI
*/
public static String getDatePattern() {
return datePattern;
}
/**
* Gets date pattern without time symbols according to given locale and date style
*
* @param locale Locale to searh pattern for
* @param dateStyle Date style to search pattern by
* @return Date pattern without time symbols
*/
public static String getDatePattern(Locale locale, int dateStyle) {
String id = locale.toString() + "+" + dateStyle;
String pattern = (String) patterns.get(id);
if (pattern == null) {
SimpleDateFormat format = (SimpleDateFormat) DateFormat.getDateInstance(dateStyle, locale);
pattern = format.toPattern();
patterns.put(id, pattern);
}
return pattern;
}
/**
* Gets date pattern without time symbols according to given locale in MEDIUM style
*
* @param locale Locale to searh pattern for
* @return Date pattern without time symbols in medium format
* @see java.text.DateFormat#MEDIUM
*/
public static String getDatePattern(Locale locale) {
return getDatePattern(locale, DateFormat.MEDIUM);
}
}
