方式一：配置容器类

@Slf4j
@Configuration
public class FeignConfig {
    @Bean
    public RequestInterceptor requestInterceptor(){
        return requestTemplate -> {
            requestTemplate.header("Content-Type","application/json;charset=UTF-8");
            RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
            if (requestAttributes!=null){
                Object session_user = requestAttributes.getAttribute("session_user",0);
                if (session_user!=null){
                    try {
                        requestTemplate.header("session_user", URLEncoder.encode(JSON.toJSONString(session_user),"utf-8"));
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }
                }
                Object session_member = requestAttributes.getAttribute("session_member",0);
                if (session_member!=null) {
                    try {
                        requestTemplate.header("session_member", URLEncoder.encode(JSON.toJSONString(session_user), "utf-8"));
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
    }
}

方式二：继承请求拦截器

@Configuration
public class FeignConfig implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes != null) {
            HttpServletRequest request = attributes.getRequest();
            //添加token
            requestTemplate.header("Authorization", request.getHeader("Authorization"));
        }
    }
}