springcloud使用feign后添加表头还是无法设置cookie

Question

有用的是下面那个方法，HttpServletRequest可以获取到cookie但是HttpServletResponse无法addCookie,之前使用ribbion把表头封装到HttpEntity就可以了，feign一直不行，大佬们救救我这菜鸡叭。

package com.longer.config;


import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

@Configuration
@EnableFeignClients(basePackages = "com.longer")
public class FeignClientsConfigurationCustom implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                .getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        Enumeration<String> headerNames = request.getHeaderNames();
        if (headerNames != null) {
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();
                String values = request.getHeader(name);
                template.header(name, values);
            }
        }
    }
    @Bean
    public FeignHystrixConcurrencyStrategy feignHystrixConcurrencyStrategy() {
        return new FeignHystrixConcurrencyStrategy();
    }

}