org.springframework.format.datetime.standard.DateTimeFormatterUtils Maven / Gradle / Ivy
/*
* Copyright 2002-2021 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
*
* https://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.springframework.format.datetime.standard;
import java.time.format.DateTimeFormatter;
import java.time.format.ResolverStyle;
import org.springframework.util.StringUtils;
/**
* Internal {@link DateTimeFormatter} utilities.
*
* @author Juergen Hoeller
* @since 5.3.5
*/
abstract class DateTimeFormatterUtils {
static DateTimeFormatter createStrictDateTimeFormatter(String pattern) {
// Using strict parsing to align with Joda-Time and standard DateFormat behavior:
// otherwise, an overflow like e.g. Feb 29 for a non-leap-year wouldn't get rejected.
// However, with strict parsing, a year digit needs to be specified as 'u'...
String patternToUse = StringUtils.replace(pattern, "yy", "uu");
return DateTimeFormatter.ofPattern(patternToUse).withResolverStyle(ResolverStyle.STRICT);
}
}