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Springmvc國(guó)際化自動(dòng)配置代碼實(shí)現(xiàn)

更新時(shí)間：2020年04月10日 09:33:30 作者：TomDu

這篇文章主要介紹了Springmvc國(guó)際化自動(dòng)配置代碼實(shí)現(xiàn),文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

在 springmvc 中通過(guò) LocalResover 獲取區(qū)域信息對(duì)象 Local（對(duì)語(yǔ)言信息、國(guó)家代碼等的封裝），進(jìn)行國(guó)際化配置，在 springboot 為我們提供了默認(rèn)的區(qū)域信息解析器

@Configuration(
  proxyBeanMethods = false
)
@ConditionalOnWebApplication(
  type = Type.SERVLET
)
@ConditionalOnClass({Servlet.class, DispatcherServlet.class, WebMvcConfigurer.class})
@ConditionalOnMissingBean({WebMvcConfigurationSupport.class})
@AutoConfigureOrder(-2147483638)
@AutoConfigureAfter({DispatcherServletAutoConfiguration.class, TaskExecutionAutoConfiguration.class, ValidationAutoConfiguration.class})
public class WebMvcAutoConfiguration {
  public static final String DEFAULT_PREFIX = "";
  public static final String DEFAULT_SUFFIX = "";
  private static final String[] SERVLET_LOCATIONS = new String[]{"/"};
 
    @Bean
    @ConditionalOnMissingBean  //容器中沒(méi)有 LocaleResolver 時(shí)
    @ConditionalOnProperty(
      prefix = "spring.mvc",
      name = {"locale"}
    )
    public LocaleResolver localeResolver() {　　　　　　　　//如果屬性中指定用固定的就用固定的 FixedLocaleResolver 區(qū)域化信息解析器
      if (this.mvcProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) {
        return new FixedLocaleResolver(this.mvcProperties.getLocale());
      } else {　　　　　　　　　　//否則使用 AcceptHeaderLocaleResolver 區(qū)域化信息解析器
        AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
        localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
        return localeResolver;
      }
    }

AcceptHeaderLocaleResolver 在 request 請(qǐng)求頭中獲取到區(qū)域信息

public class AcceptHeaderLocaleResolver implements LocaleResolver {
  private final List<Locale> supportedLocales = new ArrayList(4);
 
  public Locale resolveLocale(HttpServletRequest request) {
    Locale defaultLocale = this.getDefaultLocale();
    if (defaultLocale != null && request.getHeader("Accept-Language") == null) {
      return defaultLocale;
    } else {
      Locale requestLocale = request.getLocale();
      List<Locale> 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;
      }
    }
  }

默認(rèn)就是更具請(qǐng)求頭帶來(lái)的區(qū)域信息獲取 Local 進(jìn)行國(guó)際化

我們可以通過(guò)定義自己的區(qū)域化解析器生成區(qū)域化信息

public class MyLocaleResolver implements LocaleResolver {  
  @Override
  public Locale resolveLocale(HttpServletRequest request) {
    String l = request.getParameter("l");
    Locale locale = Locale.getDefault();
    if(!StringUtils.isEmpty(l)){
      String[] split = l.split("_");
      locale = new Locale(split[0],split[1]);
    }
    return locale;
  }
  @Override
  public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
  }
}
 
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
  @Bean
  public LocaleResolver localeResolver(){
    return new MyLocaleResolver();
  }
}

量變引起質(zhì)變，這就是我所理解的因果。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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