服务注册中心和服务发现的服务端都是由 Nacos Server 来提供的，我们只需要提供 Service 向其注册就好了。

在“栗子”中我们依然使用standalone模式运行Nacos Server。

本栗子使用spinrg cloud+nacos

1、服务提供方

1.1、创建maven工程，附上pom文件

<?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.hcj</groupId>
    <artifactId>nacos-provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nacos-provider</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/>
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.SR5</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>0.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.1、修改配置文件

注：slf4j是日志记录方面的配置，和服务提供没有任何关系，可不要。

server.port=1919
spring.application.name=nacos-provider

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

##log
##slf4j 配置内容
logging.file=logger.log
logging.level.*=trace
##  在控制台输出的日志的格式
logging.pattern.console=%d{yyyy-MM-dd} [%thread] %-5level %logger{50} - %msg%n
## 指定文件中日志输出的格式
logging.pattern.file=%d{yyyy-MM-dd} === [%thread] === %-5level === %logger{50} ==== %msg%n

2.3、向spring主函数入口添加服务发现注解

@EnableDiscoveryClient

@SpringBootApplication
@EnableDiscoveryClient
public class NacosProviderApplication {

    public static void main(String[] args) {
        SpringApplication.run(NacosProviderApplication.class, args);
    }

}

2.4、先写栗子Controller

@RestController
public class PrintController {
    @Value("${server.port}")
    private String port;

    @RequestMapping(value = "/hi",method = RequestMethod.GET)
    public String sayHi(){
        return "hello ,I'm port:"+port;
    }
}

2.5、启动服务

运行NacosProviderApplication后，我们在nacos就发现【nacos-provider】服务已注册到nacos server上了，

通过浏览器访问：http://localhost:1919/hi，成功调用服务。

2、消费者

2.1、搭建项目，附上pom文件

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hcj</groupId>
    <artifactId>nacos-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nacos-consumer</name>
    <description>Demo project for Spring Boot</description>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.SR5</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>0.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.2、修改配置文件

spring.application.name= nacos-consumer
spring.cloud.nacos.discovery.server-addr= 127.0.0.1:8848
server.port= 1929

##log
logging.file=logger.log
logging.level.*=trace
##  在控制台输出的日志的格式
logging.pattern.console=%d{yyyy-MM-dd} [%thread] %-5level %logger{50} - %msg%n
## 指定文件中日志输出的格式
logging.pattern.file=%d{yyyy-MM-dd} === [%thread] === %-5level === %logger{50} ==== %msg%n

2.3、向spring主函数入口添加服务发现注解和ribbon

@SpringBootApplication
@EnableDiscoveryClient
public class NacosConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(NacosConsumerApplication.class, args);
    }

    @LoadBalanced
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

2.4、编写Controller中调用服务

@RestController
public class PrintController {

    private final RestTemplate restTemplate;

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

    @Autowired
    public PrintController(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    @RequestMapping(value = "/hi", method = RequestMethod.GET)
    public String echo() {
        return "I'm port:"+port+", "+restTemplate.getForObject("http://nacos-provider/hi", String.class);
    }
}

2.5、启动服务，查看nacos server

消费者服务已成功注册到nacos server

我们再调用接口，成功调用提供方的服务：http://localhost:1929/hi

至此大功告成！

Nacos系列文章：

Nacos篇一 - 基本介绍

Nacos篇二 - 搭建Server