springcloud（10）Alibaba-Nacos 注册中心

淡淡的烟草味﹌ 2023-06-08 10:52 62阅读 0赞

关于nacos 服务端 的下载 安装，具体查看博客：

Linux:

[https://blog.csdn.net/lettuce\_/article/details/100935028][https_blog.csdn.net_lettuce_article_details_100935028]

Windows:

[https://blog.csdn.net/lettuce\_/article/details/103200781][https_blog.csdn.net_lettuce_article_details_103200781]

## nacos-client 配置 ##

1. 添加Module

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70][]

2. 修改pom 文件

新增

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 2][]

### 在此基础上： ###

### 提供者 ###

1. 创建 service/controller

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 3][]

2.  修改 application配置文件

server:
      port: 8052
    spring:
      application:
        name: product-alibaba-nacos-provider
      cloud:
        nacos:
          discovery:
            server-addr: 172.168.3.101:8848

3. 在启动类中添加注解   @EnableDiscoveryClient

![20191018110935249.png][]

4. 启动项目，查看页面（先保证nacos 服务器端已启动）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 4][]

### 消费者  ###

1. 创建service/controller

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 5][]

2. 创建 Feign ，调用提供者

调用接口

@FeignClient(value = "product-alibaba-nacos-provider", fallback = ProductClientFeignFallback.class)// 被调用的模块名
    public interface ProductClientFeign {
    
        @GetMapping(value = "/products") //被调用的模块的接口
        public List<Product> listProdcuts();
    }

fallback

@Component
    public class ProductClientFeignFallback implements ProductClientFeign {
        @Override
        public List<Product> listProdcuts() {
            Product product=new Product();
            product.setId(0);
            product.setName("熔断出错：Feign调用product-alibaba-nacos-provider出错");
            List<Product> list=new ArrayList<>();
            list.add(product);
            return list;
        }
    }

3. 修改service，使之调用Feign 接口

@Service
    public class ProductService {
    	@Autowired
    	ProductClientFeign productClientFeign;
    	public List<Product> listProducts(){
    		return productClientFeign.listProdcuts();
    
    	}
    }

4. 配置application.yml

server:
      port: 8053
    spring:
      application:
        name: product-alibaba-nacos-sentinel
      cloud:
        nacos:
          discovery:
            server-addr: 172.168.3.101:8848

5. 创建前端显示页面，完整目录结构如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 6][]

6. 在启动类中添加   @EnableDiscoveryClient  和 @EnableFeignClients

7. 启动项目  ，可以看到8053的消费者 调用到了 8052 的提供者

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 7][]

[https_blog.csdn.net_lettuce_article_details_100935028]: https://blog.csdn.net/lettuce_/article/details/100935028
[https_blog.csdn.net_lettuce_article_details_103200781]: https://blog.csdn.net/lettuce_/article/details/103200781
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70]: /images/20230531/5854facd6a2941b7b102c60fa4ca591e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 1]: /images/20230531/55c2625279de4ca0a555cc6193501356.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 2]: /images/20230531/c8e281bc79f3466dbb252ee441020d86.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 3]: /images/20230531/a91c57766a25459fbecda4f42bf02c0f.png
[20191018110935249.png]: /images/20230531/01f3f2b3db074f34b770f5a638f35e54.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 4]: /images/20230531/958b2d82ebf44aa3a32e3b14c034ca46.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 5]: /images/20230531/e854c87773074aa3882912b0752a9360.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 6]: /images/20230531/24f341fe5eae41f9b24c9bd0021b35f2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 7]: /images/20230531/feb07733290a4ab5857c1b4850ef4744.png