spring FixedLocaleResolver 源码
spring FixedLocaleResolver 代码
文件路径：/spring-webmvc/src/main/java/org/springframework/web/servlet/i18n/FixedLocaleResolver.java
/*
* Copyright 2002-2017 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.web.servlet.i18n;
import java.util.Locale;
import java.util.TimeZone;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.context.i18n.LocaleContext;
import org.springframework.context.i18n.TimeZoneAwareLocaleContext;
import org.springframework.lang.Nullable;
/**
* {@link org.springframework.web.servlet.LocaleResolver} implementation
* that always returns a fixed default locale and optionally time zone.
* Default is the current JVM's default locale.
*
* <p>Note: Does not support {@code setLocale(Context)}, as the fixed
* locale and time zone cannot be changed.
*
* @author Juergen Hoeller
* @since 1.1
* @see #setDefaultLocale
* @see #setDefaultTimeZone
*/
public class FixedLocaleResolver extends AbstractLocaleContextResolver {
/**
* Create a default FixedLocaleResolver, exposing a configured default
* locale (or the JVM's default locale as fallback).
* @see #setDefaultLocale
* @see #setDefaultTimeZone
*/
public FixedLocaleResolver() {
setDefaultLocale(Locale.getDefault());
}
/**
* Create a FixedLocaleResolver that exposes the given locale.
* @param locale the locale to expose
*/
public FixedLocaleResolver(Locale locale) {
setDefaultLocale(locale);
}
/**
* Create a FixedLocaleResolver that exposes the given locale and time zone.
* @param locale the locale to expose
* @param timeZone the time zone to expose
*/
public FixedLocaleResolver(Locale locale, TimeZone timeZone) {
setDefaultLocale(locale);
setDefaultTimeZone(timeZone);
}
@Override
public Locale resolveLocale(HttpServletRequest request) {
Locale locale = getDefaultLocale();
if (locale == null) {
locale = Locale.getDefault();
}
return locale;
}
@Override
public LocaleContext resolveLocaleContext(HttpServletRequest request) {
return new TimeZoneAwareLocaleContext() {
@Override
@Nullable
public Locale getLocale() {
return getDefaultLocale();
}
@Override
public TimeZone getTimeZone() {
return getDefaultTimeZone();
}
};
}
@Override
public void setLocaleContext( HttpServletRequest request, @Nullable HttpServletResponse response,
@Nullable LocaleContext localeContext) {
throw new UnsupportedOperationException("Cannot change fixed locale - use a different locale resolution strategy");
}
}
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