Feign实现服务间并且调用时传递header以及新增header

场景：A服务调用B服务，并且在进入到B服务之前，设置一个自定义的hader值，实现如下：

1、创建FeignConfiguration：

import feign.Logger;import feign.RequestInterceptor;import feign.RequestTemplate;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;import java.util.Enumeration;@Configurationpublic class FeignConfiguration implements RequestInterceptor {    /**     * 设置header传递，将当前服务的header信息传递到下游服务     *     * @param template     */    @Override    public void apply(RequestTemplate template) { ServletRequestAttributes attributes = (ServletRequestAttributes)  RequestContextHolder.getRequestAttributes(); if (attributes != null) {     HttpServletRequest request = attributes.getRequest();     Enumeration<String> headerNames = request.getHeaderNames();     if (headerNames != null) {  while (headerNames.hasMoreElements()) {      String name = headerNames.nextElement();      String values = request.getHeader(name);      // 跳过 content-length      if ("content-length".equals(name)) {   continue;      }      template.header(name, values);  }     }     template.header("test-header", "123456"); }    }}

2、配置@FeignClient：
在@FeignClient注解中，指定配置文件

@FeignClient(value = "b-service", configuration = {FeignErrorDecoder.class})public interface WageServiceFeign {......}

3、测试：
在A服务的feign配置文件通过template.header("test-header", "123456");设置了一个header，我们在B服务的Controller中，测试是否能够获取