spring mvc i18n设置

在实际的生产环境中，我们经常会使用国际化，我们使用spring mvc设置i18n。

• spring-mvc.xml

  <!-- 国际化支持 -->
  <mvc:interceptors>  
      <!-- 国际化操作拦截器 如果采用基于（请求/Session/Cookie）则必需配置 --> 
      <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />  
  </mvc:interceptors>
      <bean id="localeResolver"
          class="org.springframework.web.servlet.i18n.SessionLocaleResolver" />
      <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
          <property name="basenames">
              <list>
                  <value>/config/i18n/system</value>
                  <value>/config/i18n/messages</value>
                  <value>/config/i18n/model</value>
              </list>
          </property>
          <property name="useCodeAsDefaultMessage" value="true"/>
          <property name="cacheSeconds" value="5"/><!-- 资源刷新间隔时间 -->
      </bean>
             

• Controller代码

  /**
   * 设置当前session的语言
   * [zh/en]
   * @param request
   * @return
   */
  protected void  setSessionLocal(HttpServletRequest request,String langType){
       Locale locale;
       if(langType.equals("zh")){
           locale = new Locale("zh", "CN"); 
           request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale); 
       }
       else if(langType.equals("en")){
           locale = new Locale("en", "US"); 
           request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale);
       }
       else {
          locale=LocaleContextHolder.getLocale();
          request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,LocaleContextHolder.getLocale());
       }
       //设置session_locale
       request.getSession().setAttribute(CwsConstants.SESSION_LOCALE_KEY, CwsUtils.isNotNull(langType)?langType:CwsConstants.SESSION_LOCALE_KEY_DEFALUT);
  }
  
  /**
   * 是否已经设置语言参数
   * @param request
   * @return
   */
  protected boolean isSetSessionLocal(HttpServletRequest request){
      HttpSession session =request.getSession();
      Locale local =(Locale) session.getAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME);
      String langType =  (String) session.getAttribute(CwsConstants.SESSION_LOCALE_KEY);
      if(CwsUtils.isNotNull(langType) && local!=null){
          return true;
      }else{
          return false;
      }
  }
  
  
  /**
   * 获取值从i18n中
   * @param request
   * @return
   */
  protected final String getI18nValue(HttpServletRequest request,String key){
      RequestContext requestContext = new RequestContext(request);
      return requestContext.getMessage(key);
  }
  
  /**
   * 获取当前local值,主要用于菜单国际化[en/zh]
   * @param request
   * @return
   */
  protected final String getI18nLocale(HttpServletRequest request){
      HttpSession session =request.getSession();
      Locale local =(Locale) session.getAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME);
      String langType =  (String) session.getAttribute(CwsConstants.SESSION_LOCALE_KEY);
      if(CwsUtils.isNotNull(langType) && local!=null){
          return langType;
      }else
          return CwsConstants.SESSION_LOCALE_KEY_DEFALUT;
  }