org.dbflute.lasta.di.util.LdiDateConversionUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of lasta-di Show documentation
Show all versions of lasta-di Show documentation
DI Container for LastaFlute, super forked from Seasar as Java8
The newest version!
/*
* Copyright 2014-2015 the original author or authors.
*
* 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.
*/
package org.dbflute.lasta.di.util;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import org.dbflute.lasta.di.exception.ParseRuntimeException;
/**
* {@link Date}用の変換ユーティリティです。
*
* @author modified by jflute (originated in Seasar)
*
*/
public class LdiDateConversionUtil {
/**
* インスタンスを構築します。
*/
protected LdiDateConversionUtil() {
}
/**
* {@link Date}に変換します。
*
* @param o
* @return {@link Date}
*/
public static Date toDate(Object o) {
return toDate(o, null);
}
/**
* {@link Date}に変換します。
*
* @param o
* @param pattern
* @return {@link Date}
*/
public static Date toDate(Object o, String pattern) {
if (o == null) {
return null;
} else if (o instanceof String) {
return toDate((String) o, pattern);
} else if (o instanceof Date) {
return (Date) o;
} else if (o instanceof Calendar) {
return ((Calendar) o).getTime();
} else {
return toDate(o.toString(), pattern);
}
}
/**
* {@link Date}に変換します。
*
* @param s
* @param pattern
* @return {@link Date}
*/
public static Date toDate(String s, String pattern) {
return toDate(s, pattern, Locale.getDefault());
}
/**
* @param s
* @param pattern
* @param locale
* @return
*/
public static Date toDate(String s, String pattern, Locale locale) {
if (LdiStringUtil.isEmpty(s)) {
return null;
}
SimpleDateFormat sdf = getDateFormat(s, pattern, locale);
try {
return sdf.parse(s);
} catch (ParseException ex) {
throw new ParseRuntimeException(ex);
}
}
/**
* {@link SimpleDateFormat}を返します。
*
* @param s
* @param pattern
* @param locale
* @return {@link SimpleDateFormat}
*/
public static SimpleDateFormat getDateFormat(String s, String pattern, Locale locale) {
if (pattern != null) {
return new SimpleDateFormat(pattern);
}
return getDateFormat(s, locale);
}
/**
* {@link SimpleDateFormat}を返します。
*
* @param s
* @param locale
* @return {@link SimpleDateFormat}
*/
public static SimpleDateFormat getDateFormat(String s, Locale locale) {
String pattern = getPattern(locale);
String shortPattern = removeDelimiter(pattern);
String delimitor = findDelimiter(s);
if (delimitor == null) {
if (s.length() == shortPattern.length()) {
return new SimpleDateFormat(shortPattern);
}
if (s.length() == shortPattern.length() + 2) {
return new SimpleDateFormat(LdiStringUtil.replace(shortPattern, "yy", "yyyy"));
}
} else {
String[] array = LdiStringUtil.split(s, delimitor);
for (int i = 0; i < array.length; ++i) {
if (array[i].length() == 4) {
pattern = LdiStringUtil.replace(pattern, "yy", "yyyy");
break;
}
}
return new SimpleDateFormat(pattern);
}
return new SimpleDateFormat();
}
/**
* {@link SimpleDateFormat}を返します。
*
* @param locale
* @return {@link SimpleDateFormat}
*/
public static SimpleDateFormat getDateFormat(Locale locale) {
return new SimpleDateFormat(getPattern(locale));
}
/**
* 年4桁用の{@link SimpleDateFormat}を返します。
*
* @param locale
* @return 年4桁用の{@link SimpleDateFormat}
*/
public static SimpleDateFormat getY4DateFormat(Locale locale) {
return new SimpleDateFormat(getY4Pattern(locale));
}
/**
* 年4桁用の日付パターンを返します。
*
* @param locale
* @return 年4桁用の日付パターン
*/
public static String getY4Pattern(Locale locale) {
String pattern = getPattern(locale);
if (pattern.indexOf("yyyy") < 0) {
pattern = LdiStringUtil.replace(pattern, "yy", "yyyy");
}
return pattern;
}
/**
* 日付パターンを返します。
*
* @param locale
* @return 日付パターン
*/
public static String getPattern(Locale locale) {
SimpleDateFormat df = (SimpleDateFormat) DateFormat.getDateInstance(DateFormat.SHORT, locale);
String pattern = df.toPattern();
int index = pattern.indexOf(' ');
if (index > 0) {
pattern = pattern.substring(0, index);
}
if (pattern.indexOf("MM") < 0) {
pattern = LdiStringUtil.replace(pattern, "M", "MM");
}
if (pattern.indexOf("dd") < 0) {
pattern = LdiStringUtil.replace(pattern, "d", "dd");
}
return pattern;
}
/**
* 日付のデリミタを探します。
*
* @param value
* @return 日付のデリミタ
*/
public static String findDelimiter(String value) {
for (int i = 0; i < value.length(); ++i) {
char c = value.charAt(i);
if (Character.isDigit(c)) {
continue;
}
return Character.toString(c);
}
return null;
}
/**
* 日付パターンから日付のデリミタを探します。
*
* @param pattern
* @return 日付のデリミタ
*/
public static String findDelimiterFromPattern(String pattern) {
String ret = null;
for (int i = 0; i < pattern.length(); ++i) {
char c = pattern.charAt(i);
if (c != 'y' && c != 'M' && c != 'd') {
ret = String.valueOf(c);
break;
}
}
return ret;
}
/**
* 日付パターンから日付のデリミタを取り除きます。
*
* @param pattern
* パターン
* @return 日付のデリミタを取り除いた後のパターン
*/
public static String removeDelimiter(String pattern) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < pattern.length(); ++i) {
char c = pattern.charAt(i);
if (c == 'y' || c == 'M' || c == 'd') {
buf.append(c);
}
}
return buf.toString();
}
}