Spring Cloud Alibaba - Nacos服务提供

一、Nacos服务提供者

Nacos兼具注册中心

二、前期代码准备

后续Spring Cloud Alibaba开发都是基于本套代码上开发

2.1， 构架Maven项目，取名sca-partner

• pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ydw</groupId>
    <artifactId>sca-partner</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!-- 子工程 -->
    <modules>
        <module>sca-service-8081</module>
    </modules>

    <!--父工程打包方式为pom-->
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.5.RELEASE</version>
    </parent>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!--SCA -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
        <!--SCA -->
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <!--web依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!--编译插件-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <encoding>utf-8</encoding>
                </configuration>
            </plugin>
            <!--打包插件-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <!-- 配置是否被传播到子POM，后续dubbo的api服务会因为pom打包方式导致无法install -->
                <inherited>false</inherited>
            </plugin>
        </plugins>
    </build>

</project>

三、Nacos服务提供者开发

3.1，构架SpringBoot项目，取名sca-service-8081（取名建议带上端口号，后续微服务太多方便查询）

• pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <parent>
        <artifactId>sca-partner</artifactId>
        <groupId>com.ydw</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>sca-service-8081</artifactId>

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

• application.yml

server:
  port: 8081  # 端口
spring:
  application:
    name: sca-service # 服务名，同是也会作为Nacos注册中心的服务名
  # nacos配置
  cloud:
    nacos:
      discovery:
        # 集群中各节点信息都配置在这里（集群用，隔开）
        server-addr: 127.0.0.1:8848

• ScaService8081Application.java启动类

package com.ydw.sca;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient //通用注册中心注解
public class ScaService8081Application {
    public static void main(String[] args) {
        SpringApplication.run(ScaService8081Application.class, args);
    }
}

• 启动成功后，会在注册中心上面看到服务名

  
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