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国际化
原理
通过Properties文件配置#xff0c;配置完后通过Thymeleaf中的#{} 来取代原来的静态资源。例如#xff1a; spring:# 关闭模板引擎的缓存thymeleaf:cache: falsemessages:encoding: UTF-8## 配置国际化绑定的文…在哔哩哔哩一位up主视频中学到的
国际化
原理
通过Properties文件配置配置完后通过Thymeleaf中的#{} 来取代原来的静态资源。例如 spring:# 关闭模板引擎的缓存thymeleaf:cache: falsemessages:encoding: UTF-8## 配置国际化绑定的文件 不绑定会乱码basename: i18n.login
语言环境解析器接口
package org.springframework.web.servlet;import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.lang.Nullable;public interface LocaleResolver {//解析语言环境Locale resolveLocale(HttpServletRequest var1);void setLocale(HttpServletRequest var1, Nullable HttpServletResponse var2, Nullable Locale var3);
}在SpringMvc自动配置类中语言环境解析器代码如下 public class WebMvcAutoConfiguration {//**语言环境解析器**public LocaleResolver localeResolver() {if (this.mvcProperties.getLocaleResolver() org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) {return new FixedLocaleResolver(this.mvcProperties.getLocale());} else { // AcceptHeaderLocaleResolver 默认的**语言环境解析器**AcceptHeaderLocaleResolver localeResolver new AcceptHeaderLocaleResolver();localeResolver.setDefaultLocale(this.mvcProperties.getLocale());return localeResolver;}}
}默认使用的语言环境解析器
package org.springframework.web.servlet.i18n;import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.LocaleResolver;public class AcceptHeaderLocaleResolver implements LocaleResolver {private final ListLocale supportedLocales new ArrayList(4);Nullableprivate Locale defaultLocale;public AcceptHeaderLocaleResolver() {}public void setSupportedLocales(ListLocale locales) {this.supportedLocales.clear();this.supportedLocales.addAll(locales);}public ListLocale getSupportedLocales() {return this.supportedLocales;}public void setDefaultLocale(Nullable Locale defaultLocale) {this.defaultLocale defaultLocale;}Nullablepublic Locale getDefaultLocale() {return this.defaultLocale;}//!!!public Locale resolveLocale(HttpServletRequest request) {Locale defaultLocale this.getDefaultLocale();if (defaultLocale ! null request.getHeader(Accept-Language) null) {return defaultLocale;} else {Locale requestLocale request.getLocale();ListLocale supportedLocales this.getSupportedLocales();if (!supportedLocales.isEmpty() !supportedLocales.contains(requestLocale)) {Locale supportedLocale this.findSupportedLocale(request, supportedLocales);if (supportedLocale ! null) {return supportedLocale;} else {return defaultLocale ! null ? defaultLocale : requestLocale;}} else {return requestLocale;}}}Nullableprivate Locale findSupportedLocale(HttpServletRequest request, ListLocale supportedLocales) {EnumerationLocale requestLocales request.getLocales();Locale languageMatch null;Locale locale;label38:do {while(requestLocales.hasMoreElements()) {locale (Locale)requestLocales.nextElement();if (supportedLocales.contains(locale)) {continue label38;}if (languageMatch null) {Iterator var6 supportedLocales.iterator();while(var6.hasNext()) {Locale candidate (Locale)var6.next();if (!StringUtils.hasLength(candidate.getCountry()) candidate.getLanguage().equals(locale.getLanguage())) {languageMatch candidate;break;}}}}return languageMatch;} while(languageMatch ! null !languageMatch.getLanguage().equals(locale.getLanguage()));return locale;}//!!!public void setLocale(HttpServletRequest request, Nullable HttpServletResponse response, Nullable Locale locale) {throw new UnsupportedOperationException(Cannot change HTTP accept header - use a different locale resolution strategy);}
}自定义语言环境解析器
我们自定义语言环境解析器然后在引入到WebMvc配置类中来替代原有的语言环境解析器。
我们只需要实现LocaleResolver接口即可
/*** 自定义 语言环境解析器*/
public class MyLocaleResolver implements LocaleResolver {//解析请求Overridepublic Locale resolveLocale(HttpServletRequest httpServletRequest) {//获取请求中的语言参数Locale locale null;final String language httpServletRequest.getParameter(Language); //例如 zh_CN en_USSystem.out.println(-------language);if(!StringUtils.isEmpty(language)){ // return target null || target.length() 0;final String[] s language.split(_);// s[0]:国家 s[1]:地区locale new Locale(s[0],s[1]);return locale;}locale Locale.getDefault(); // 如果没有请求参数就是默认的return locale;}Overridepublic void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {}
}将自定义的语言环境解析器加入SpringMvc自动配置类中
在自动配置类中需要将自定义的MyLocaleResolver类取代WebMvcAutoConfiguration中对应的方法
/*** 定义一个WebMvcConfigurer 的实现类可以重写SpringMvc的配置* 在这个类中 定义的组件然后将它交给springbootspringboot就会自动装配*/
Configuration
public class MyMvcConfig implements WebMvcConfigurer {//自定义国际化组件 重写了 WebMvcAutoConfiguration 类中的 localeResolver 方法 Beanpublic LocaleResolver localeResolver(){return new MyLocaleResolver();}}效果图展示
