06 国际化

2）、国际化

1）、编写国际化配置文件；

2）、使用ResourceBundleMessageSource管理国际化资源文件

3）、在页面使用fmt:message取出国际化内容

步骤：

1）、编写国际化配置文件，抽取页面需要显示的国际化消息

2）、SpringBoot自动配置好了管理国际化资源文件的组件；

@ConfigurationProperties(prefix ="spring.messages")publicclassMessageSourceAutoConfiguration{/**

* Comma-separated list of basenames (essentially a fully-qualified classpath

* location), each following the ResourceBundle convention with relaxed support for

* slash based locations. If it doesn't contain a package qualifier (such as

* "org.mypackage"), it will be resolved from the classpath root.

*/privateString basename

="messages";//我们的配置文件可以直接放在类路径下叫messages.properties；@BeanpublicMessageSourcemessageSource(){ResourceBundleMessageSource

messageSource

=newResourceBundleMessageSource();if(StringUtils.hasText(this.basename))

{//设置国际化资源文件的基础名（去掉语言国家代码的）messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(this.basename)));}if(this.encoding

!=null)

{messageSource.setDefaultEncoding(this.encoding.name());}messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale);messageSource.setCacheSeconds(this.cacheSeconds);messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat);returnmessageSource;}

3）、去页面获取国际化的值；

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效果：根据浏览器语言设置的信息切换了国际化；

原理：

​ 国际化Locale（区域信息对象）；LocaleResolver（获取区域信息对象）；

@Bean@ConditionalOnMissingBean@ConditionalOnProperty(prefix

="spring.mvc", name

="locale")publicLocaleResolverlocaleResolver(){if(this.mvcProperties.getLocaleResolver()

== WebMvcProperties.LocaleResolver.FIXED)

{returnnewFixedLocaleResolver(this.mvcProperties.getLocale());}AcceptHeaderLocaleResolver

localeResolver

=newAcceptHeaderLocaleResolver();localeResolver.setDefaultLocale(this.mvcProperties.getLocale());returnlocaleResolver;}默认的就是根据请求头带来的区域信息获取Locale进行国际化

4）、点击链接切换国际化

/**

* 可以在连接上携带区域信息

*/publicclassMyLocaleResolverimplementsLocaleResolver{@OverridepublicLocaleresolveLocale(HttpServletRequest

request){        String l = request.getParameter("l");        Locale

locale = Locale.getDefault();if(!StringUtils.isEmpty(l)){           

String[] split = l.split("_");            locale

=newLocale(split[0],split[1]);        }returnlocale;   

}@OverridepublicvoidsetLocale(HttpServletRequest request,

HttpServletResponse response, Locale locale){   

}}@BeanpublicLocaleResolverlocaleResolver(){returnnewMyLocaleResolver(); 

  }}