如何用spring-cloud-alibaba-nacos注冊中心實現(xiàn)服務

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版本選擇

父工程pom文件：

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.1.17.RELEASE</spring-boot.version>
        <!--spring cloud 版本-->
        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
        <spring-cloud-alibaba.version>2.1.2.RELEASE</spring-cloud-alibaba.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

通用依賴：

    <dependencies>
        <!--springboot最基本的依賴-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <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>
        </dependency>
        <!--nacos 服務注冊與發(fā)現(xiàn)-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

服務端（Provider）模塊：

添加@EnableDiscoveryClient注解在啟動類上

/**
 * @description:
 * @項目 www.fhadmin.org
 * @create 2021-04
 **/
@SpringBootApplication
@EnableDiscoveryClient
public class NacosProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(NacosProviderApplication.class, args);
    }
}

//java項目www.fhadmin.org
@RestController
@RequestMapping("/goods")
public class GoodsController {

    @Value("${server.port}")
    private int port;

    @GetMapping("/findOne3")
    public Goods findGoodsById3() {
        //當前線程睡2秒
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Goods goods = new Goods().setId(1).setPrice(123.123).setCount(1200).setTitle("標題");
        return goods.setTitle(goods.getTitle() + ":" + port);
    }

}

application.yml：
配置服務名和nacos地址和端口，最下面的配置不用管

server:
  port: 8000

spring:
  application:
    name: nacos-provider # 服務名稱
  cloud:
    nacos:
      discovery:
        server-addr:  127.0.0.1:8848 # 配置nacos 服務端地址
management:
  endpoints:
    web:
      exposure:
        include: '*'

消費端（Consumer）模塊

添加@EnableDiscoveryClient注解在啟動類上

/**
 * @description:
 * java項目www.fhadmin.org
 * @create 2021-04
 **/
@SpringBootApplication
@EnableDiscoveryClient
public class NacosConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(NacosConsumerApplication.class, args);
    }
}

application.yml：
配置服務名和nacos地址和端口，最下面的配置不用管

server:
  port: 9000

spring:
  application:
    name: nacos-consumer # 服務名稱
  cloud:
    nacos:
      discovery:
        server-addr:  127.0.0.1:8848 # 配置nacos 服務端地址
management:
  endpoints:
    web:
      exposure:
        include: '*'

啟動測試：

用戶名密碼都是 nacos

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