1。定义拦截器类，实现apply方法：

package cn.tju.edu.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;

public class MyInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        System.out.println("Reuest path is: "+requestTemplate.path());
    }
}

2.配置拦截器类：

package cn.tju.edu.config;

import cn.tju.edu.interceptor.MyInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class InterceptorConfig {
    @Bean
    public MyInterceptor getInterceptor(){
        return new MyInterceptor();
    }
}