Nacos基础教程(四)--------Nacos+SpringBoot服务发现

蔚落 2023-03-04 03:26 42阅读 0赞

# 1. 前言 #

系列文章地址：[https://blog.csdn.net/shouchenchuan5253/category\_10223260.html][https_blog.csdn.net_shouchenchuan5253_category_10223260.html]

项目地址：[https://gitee.com/dikeywork/learn-springboot][https_gitee.com_dikeywork_learn-springboot]

# 2. 创建消费者项目 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_16_color_FFFFFF_t_70_pic_center]

# 3. 引入相关包 #

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>cn.yzstu</groupId>
            <artifactId>learn-springboot</artifactId>
            <version>1.0</version>
            <relativePath/> 
        </parent>
        <groupId>cn.yzstu</groupId>
        <artifactId>learn-nacos-consumer</artifactId>
        <version>1.0</version>
        <name>learn-nacos-consumer</name>
        <description>nacos消费者</description>
    
        <properties>
            <java.version>${java.version}</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
                <version>${springboot.version}</version>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <version>${springboot.version}</version>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            
            
            <dependency>
                <groupId>com.alibaba.boot</groupId>
                <artifactId>nacos-config-spring-boot-starter</artifactId>
                <version>${nacos.config.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.boot</groupId>
                <artifactId>nacos-discovery-spring-boot-starter</artifactId>
                <version>${nacos.discovery.version}</version>
            </dependency>
            
            
            
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>${swagger2.version}</version>
            </dependency>
            
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>${swagger2.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <version>${springboot.version}</version>
                <scope>compile</scope>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <version>${springboot.version}</version>
                </plugin>
            </plugins>
        </build>
    
    </project>

这是pom完整文件，核心包在其中已经备注了。

# 4. 配置服务地址 #

server:
      port: 8089
      ip: 127.0.0.1
    
    spring:
      application:
        name: nacos-consumer
    nacos:
      config:
        server-addr: 127.0.0.1:8848 # 配置 Nacos 配置 的地址
      discovery:
        server-addr: 127.0.0.1:8848

# 5. 开启自动注册 #

import com.alibaba.nacos.api.annotation.NacosInjected;
    import com.alibaba.nacos.api.exception.NacosException;
    import com.alibaba.nacos.api.naming.NamingService;
    import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Configuration;
    
    import javax.annotation.PostConstruct;
    
    
    /** * nacos配置类 * @author baldwin */
    @Configuration
    @NacosPropertySource(dataId = "TestConfig.yml",groupId = "yzstu", autoRefreshed = true) //加载 dataId 为 example 的配置源，并开启自动更新
    public class NacosConfig { 
        @Value("${server.port}")
        private int serverPort;
    
        @Value("${server.ip}")
        private String ip;
    
        @Value("${spring.application.name}")
        private String applicationName;
    
        @NacosInjected
        private NamingService namingService;
    
        /** * 开机自动注册服务 * @throws NacosException */
        @PostConstruct
        public void registerInstance() throws NacosException { 
            namingService.registerInstance(applicationName, ip, serverPort);
        }
    }

# 6. 相关接口 #

import com.alibaba.nacos.api.annotation.NacosInjected;
    import com.alibaba.nacos.api.config.annotation.NacosValue;
    import com.alibaba.nacos.api.naming.NamingService;
    import com.alibaba.nacos.api.naming.pojo.Instance;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiImplicitParam;
    import io.swagger.annotations.ApiOperation;
    import lombok.Data;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    @RestController
    @RequestMapping(("/api/nacos"))
    @Api(value = "Nacos服务相关接口")
    @Data
    public class NacosApi { 
    
        @NacosInjected
        private NamingService namingService;
    
        @NacosValue(value = "${site.ip:0.0.0.0}",autoRefreshed = true)
        private String siteIp;
    
        @NacosValue(value = "${site.name:null}",autoRefreshed = true)
        private String siteName;
    
        @ApiOperation(value = "获取网站信息")
        @GetMapping(value = "/getSiteInfo")
        public String getSiteInfo(){ 
            return "MySite:"+siteName + ",ip:"+siteIp;
        }
        @ApiOperation(value = "获取实例信息")
        @ApiImplicitParam(value = "serviceName",example = "nacos-service",required = true)
        @GetMapping(value = "/getServiceInfo")
        public List<Instance> getInstanceInfo(@RequestParam(value = "serviceName") String serviceName){ 
            try { 
                return namingService.getAllInstances(serviceName) ;
            } catch (Exception e){ 
                e.printStackTrace();
            }
            return null ;
        }
    }

# 7. 服务发现检测 #

启动消费者服务和[上篇文章][Link 1]的服务  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_16_color_FFFFFF_t_70_pic_center 1]

发现服务成功

# 8. 总结 #

发现服务过程中，需要做的是导discovery包，配置服务中心地址，提供发现服务的接口/方法。这个项目中有许多配置是为了以后的工作顺利而做的，大家注意区分。  
如果在学习过程出现问题，欢迎关注我的公众号，与我在线交流  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_8_color_FFFFFF_t_70_pic_center]

项目地址：[https://gitee.com/dikeywork/learn-springboot/tree/master/learn-nacos][https_gitee.com_dikeywork_learn-springboot_tree_master_learn-nacos]

系列文章地址：[https://blog.csdn.net/shouchenchuan5253/category\_10223260.html][https_blog.csdn.net_shouchenchuan5253_category_10223260.html]

我是Baldwin，一个25岁的程序员，致力于让学习变得更有趣，如果你也真正喜爱编程，真诚的希望与你交个朋友，一起在编程的海洋里徜徉！

往期好文：

[用Python每天给女神发一句手机短信情话][Python]

[MySQL优化之explain][MySQL_explain]

[Spring源码分析-MVC初始化][Spring_-MVC]

[春风得意马蹄疾，一文看尽（JVM）虚拟机][JVM]

[造轮子的艺术][Link 2]

[源码阅读技巧][Link 3]

[Java注解详解][Java]

[教你自建SpringBoot服务器][SpringBoot]

[更多文章请点击][Link 4]

[https_blog.csdn.net_shouchenchuan5253_category_10223260.html]: https://blog.csdn.net/shouchenchuan5253/category_10223260.html
[https_gitee.com_dikeywork_learn-springboot]: https://gitee.com/dikeywork/learn-springboot
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_16_color_FFFFFF_t_70_pic_center]: /images/20230208/7677b9259fd641278ce53b4ea25bf225.png
[Link 1]: https://blog.csdn.net/shouchenchuan5253/article/details/107602127
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20230208/8c6965a8725a44318152b772d2a155e9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Nob3VjaGVuY2h1YW41MjUz_size_8_color_FFFFFF_t_70_pic_center]: /images/20230208/e54506dd5c9649ceb6e707deb96ae4ba.png
[https_gitee.com_dikeywork_learn-springboot_tree_master_learn-nacos]: https://gitee.com/dikeywork/learn-springboot/tree/master/learn-nacos
[Python]: https://blog.csdn.net/shouchenchuan5253/article/details/105753596
[MySQL_explain]: https://blog.csdn.net/shouchenchuan5253/article/details/105722148
[Spring_-MVC]: https://blog.csdn.net/shouchenchuan5253/article/details/105625890
[JVM]: https://yzstu.blog.csdn.net/article/details/105462458
[Link 2]: https://blog.csdn.net/shouchenchuan5253/article/details/105256723
[Link 3]: https://blog.csdn.net/shouchenchuan5253/article/details/105196154
[Java]: https://blog.csdn.net/shouchenchuan5253/article/details/105145725
[SpringBoot]: https://blog.csdn.net/shouchenchuan5253/article/details/104773702
[Link 4]: https://blog.csdn.net/shouchenchuan5253/article/details/105020803