SpringCloud应用集成Nacos服务注册与发现

第一步：引入依赖

版本见 => 附录：根pom文件=>版本控制片段

		<!-- 引入nacos用于服务注册与发现 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- Spring Boot依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- 引入openfeign用于服务消费测试 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>

第二步：配置 application.yml 文件

（1）服务提供者

server:
  port: 8083
spring:
  application:
    name: spring-cloud-alibaba-nacos-provider
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

（2）服务消费者

server:
  port: 8082
spring:
  application:
    name: spring-cloud-alibaba-nacos-consumer
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

第三步：启动类加`@EnableDiscoveryClient`注解开启服务注册与发现

（1）服务提供者

package com.anhaoyang.test.naocs.provider;

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

@SpringBootApplication
@EnableDiscoveryClient //开启服务发现
public class BootNacosDiscoveryProviderApplication {

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

}

package com.anhaoyang.test.naocs.provider;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

/**
 * 服务提供测试类
 **/
@RestController
public class ProviderController {
    @GetMapping("/echo/{string}")
    public String echo(@PathVariable String string) {
        return "Provider received: " + string;
    }
}

（2）服务消费者

package com.anhaoyang.test.naocs.consumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@EnableDiscoveryClient //开启服务发现
public class BootNacosDiscoveryConsumerApplication {

    /**
     *  创建RestTemplate用于测试
     * @return
     */
    @LoadBalanced
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

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

}

package com.anhaoyang.test.naocs.consumer;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * 服务消费测试
 **/
@RestController
public class ConsumerController {

    private final RestTemplate restTemplate;

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

    @GetMapping("/get")
    public String get() {
        return restTemplate.getForObject("http://spring-cloud-alibaba-nacos-provider/echo/" + "ConsumerRequestBody", String.class);
    }
}