SpringCloud网关(Zuul)如何给多个微服务之间传递共享参数

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        String reqUrl=request.getRequestURL().toString();
        HttpSession session = request.getSession();         
    	Map<String, Object> user=(Map<String, Object>) session.getAttribute("user");  
        if(!(reqUrl.contains("permissionUser/userLogin") || (reqUrl.contains("noAuth")) 
        		|| reqUrl.contains("appapi"))) {
        	String[] actProfile = env.getActiveProfiles();
    		String curProfile = actProfile[0];
    		
        	if (StringUtils.startsWith(curProfile, "dev")) { //dev环境不做过滤    			
    			return null;    			
    		} 
        	
    		//判断用户ID是否存在，不存在就跳转到登录界面
        	if (!checkUserIsLogin(ctx, user)) {
        	//	System.out.println("session丢失： " + request.getSession().getId());
        		return null;
        	}
        	
            //放行ignoreUrls中配置的url
        	if(checkIsIgnoreUrl(request)) {
        		addUserToZuulRequestHeader(user);
        		return null;
        	}
        	
        	//检查该url是否有权访问
        	if (!checkIsUrlHasRight(ctx)) {
        		return null;
        	}
        	//从会话之中获得当前登录用户的userId，判断用户是否被踢
        	if (checkUserIsKickout(ctx, user)) {
        		return null;
        	}            
        }
        //可以往后走了，把session放入request的header中
        addUserToZuulRequestHeader(user);  
        //语言包
        setLanguageLocal(request);
        return null;
    }
 
     /**
	 * 设置本地语言包
	 * */
	private void setLanguageLocal(HttpServletRequest request) {
		String lang = "zh";
		if (StringUtils.isNotEmpty(request.getParameter("lang"))) {
			lang = request.getParameter("lang");
		}else {
			lang=localeMessageSourceService.getCurrentLanguage();
		}
		switch(lang) {
			case "zh":
				LocaleContextHolder.setLocale(Locale.CHINESE);
				break;
			case "en":
				LocaleContextHolder.setLocale(Locale.ENGLISH);
				break;
			case "fr":
				LocaleContextHolder.setLocale(Locale.FRENCH); 
				break;
		}
		//此处为获得请求的参数 然后在请求的参数里面加入暂存的语言携带参数 lang
		RequestContext ctx = RequestContext.getCurrentContext();
		request.getParameterMap();
		Map<String,List<String>> requestQueryParams=ctx.getRequestQueryParams();
		if(requestQueryParams==null) {
			requestQueryParams=new HashMap<>();
		}
		//String langCode=request.getParameter("lang").toString();
		//讲需要新增的参数添加进去，被调用的微服务可以直接获取，就像普通的一样；框架会直接注入进去
		    ArrayList<String> arrayList = new ArrayList<>();
            arrayList.add(lang);       
            requestQueryParams.put("lang", arrayList);
            ctx.setRequestQueryParams(requestQueryParams);
		FrameWorkConstant.MSG_INFO_EMPTY = localeMessageSourceService.getMessage("msg.info.empty");
		FrameWorkConstant.MSG_INFO_SUCCESS = localeMessageSourceService.getMessage("msg.success.operate");
		FrameWorkConstant.MSG_INFO_FAILED= localeMessageSourceService.getMessage("msg.error.unknown");
	}

import java.util.Locale; 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;
 
/***
 *@purpose:国际化启动配置类
 *@since:2018年4月9日
 ***/
@Configuration
public class ChangeLanauageConfigurer extends WebMvcConfigurerAdapter {
 
 
	/**
	 * 描述 : 国际化配置类(会话区域解析器)
	 *
	 */
	@Bean
    public SessionLocaleResolver localeResolver() {
        SessionLocaleResolver slr = new SessionLocaleResolver();
//        System.out.println("aaaaaaaaaaaaaaaaaaaaaa");
//        // 设置默认语言
        slr.setDefaultLocale(Locale.CHINESE);       
        return slr;
    }
 
    @Bean
    public LocaleChangeInterceptor localeChangeInterceptor() {
        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
        // 设置参数名
        lci.setParamName("lang");
        return lci;
    }
 
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(localeChangeInterceptor());
    }
}

/***
 *@purpose:本地化语言信息工具类
 *@since:2018年3月30日
 ***/
@Service
public class LocaleMessageSourceService {
	
	@Autowired
	private MessageSource messageSource;
 
    /**
    *
    *@param code：对应messages配置的key.
    *@return
    */
 
   public String getMessage(String code){
 
      //这里使用比较方便的方法，不依赖request.
      Locale locale = LocaleContextHolder.getLocale();
      String lang = locale.getLanguage();
      if(LanguageConstant.LANGUAGE_FR.equals(lang)) {
    	  locale = new Locale(lang,"FR");
      }
      if(LanguageConstant.LANGUAGE_ZH.equals(lang)) {
    	  locale = new Locale(lang,"CN");
      }
      if(LanguageConstant.LANGUAGE_EN.equals(lang)) {
    	  locale = new Locale(lang,"US");
      }
      
      String message = messageSource.getMessage(code,null,locale);
      return message;
   }
   
   /**
             * 获得当前语言
    * @param code
    * @return
    */
   public String getCurrentLanguage(){
 
       Locale locale = LocaleContextHolder.getLocale();
       String lang = locale.getLanguage();
       if(StringUtils.isEmpty(lang)) {
       	lang = LanguageConstant.LANGUAGE_EN;
       }
       return lang;
    }  
}