SpringCloud Alibaba-Nacos注册中心与SpringCloud-OpenFeign远程调用测试

素颜马尾好姑娘i 2022-12-03 15:52 104阅读 0赞

# 一. SpringCloud Alibaba-Nacos注册中心 #

1.  本地安装下载Nacos Server(目前最新1.3.2)  
    （1）[https://github.com/alibaba/nacos/releases][https_github.com_alibaba_nacos_releases]  
    （2）Windows 操作系统，执行命令 cmd startup.cmd  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5MTk4NzQ5_size_16_color_FFFFFF_t_70_pic_center]  
    **注意：如果启动不了，请修改启动模式为standalone**
2.  pom文件中引入Nacos Discovery Starter

<dependency>
         <groupId>com.alibaba.cloud</groupId>
         <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
     </dependency>

1.  application.yml配置文件中配置Nacos Server地址

spring:
      application:
        name: gulimall-coupon
      cloud:
        nacos:
          discovery:
            server-addr: 127.0.0.1:8848

1.  使用 @EnableDiscoveryClient 注解开启服务注册与发现功能

@EnableDiscoveryClient
    @SpringBootApplication
    public class GulimallCouponApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(GulimallCouponApplication.class, args);
        }
    }

1.  启动项目，浏览器中输入http://127.0.0.1:8848/nacos/ 即可进入管理页面  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5MTk4NzQ5_size_16_color_FFFFFF_t_70_pic_center 1]

# 二. SpringCloud-OpenFeign远程调用 #

1.  @FeignClient创建要远程调用的服务的接口

package com.atguigu.gulimall.member.feign;
    
    import com.atguigu.common.utils.R;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    /**
     * @author QuS
     * @date 2020/9/4 11:07
     */
    @FeignClient("gulimall-coupon")
    public interface CouponFeignService {
    
        /**
         * 测试feign远程调用，与远程的RequestMapping地址和方法名一致
         *
         * @return
         */
        @RequestMapping("/coupon/coupon/member/list")
        R memberCoupons();
    }

@FeignClient 注解将 CouponFeignService这个接口包装成一个 FeignClient，属性 name 对应注册进的服务名gulimall-coupon；

1.  在启动类中加入@EnableFeignClients

package com.atguigu.gulimall.member;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    @EnableFeignClients(basePackages = "com.atguigu.gulimall.member.feign")
    @EnableDiscoveryClient
    @SpringBootApplication
    public class GulimallMemberApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(GulimallMemberApplication.class, args);
        }
    }

basePackages指向远程调用服务的类所在的包路径

1.  将CouponFeignService加入Controller中进行测试

原文：[https://github.com/alibaba/spring-cloud-alibaba/blob/master/spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/readme-zh.md][https_github.com_alibaba_spring-cloud-alibaba_blob_master_spring-cloud-alibaba-examples_nacos-example_nacos-discovery-example_readme-zh.md]

[https_github.com_alibaba_nacos_releases]: https://github.com/alibaba/nacos/releases
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5MTk4NzQ5_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/7cd3fd4c83984aafb567dfcc3c8ea1ce.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5MTk4NzQ5_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/a8c81e9b6d3f4721bec9ba147cec4037.png
[https_github.com_alibaba_spring-cloud-alibaba_blob_master_spring-cloud-alibaba-examples_nacos-example_nacos-discovery-example_readme-zh.md]: https://github.com/alibaba/spring-cloud-alibaba/blob/master/spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/readme-zh.md