SpringCloud项目接入Nacos服务治理

1. 环境准备

组件	版本
JDK	1.8.0_181
IDEA	2021.1
SpringBoot	2.0.4.RELEASE
SpringCloud	Finchley.RELEASE
SpringCloud-alibaba-dependencies	0.2.2.RELEASE
Nacos-server	2.0.4

nacos-server版本：

Nacos针对不同版本的SpingCloud提供不同的依赖，各个版本的对应关系请参考官方文档给出的说明：版本说明

2. 父级工程pom依赖

    4.0.0

    com.hl.magic
    Think-In-SpringCloud
    pom
    1.0-SNAPSHOT
    
        SpringCloud-Nacos-config
        SpringCloud-Nacos-consumer
        SpringCloud-Nacos-provider
    

    
        8
        8
        1.8
        2.0.4.RELEASE
        Finchley.RELEASE
        0.2.2.RELEASE
    

    
        
            org.projectlombok
            lombok
            true
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

    
        
            
                org.springframework.cloud
                spring-cloud-dependencies
                ${spring-cloud.version}
                pom
                import
            
            
                org.springframework.boot
                spring-boot-dependencies
                ${spring-boot.version}
                pom
                import
            
            
                org.springframework.cloud
                spring-cloud-alibaba-dependencies
                ${nacos.version}
                pom
                import
            
        
    

---

3.服务提供者 3.1 pom.xml依赖

nacos-service-provider服务提供者项目pom依赖

    
        Think-In-SpringCloud
        com.hl.magic
        1.0-SNAPSHOT
    
    4.0.0

    SpringCloud-Nacos-provider
    服务提供者

    
        
            org.springframework.cloud
            spring-cloud-starter-alibaba-nacos-discovery
        
    

---

3.2 入口主程序

ProviderApplication.java

package com.hl.magic;

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


@SpringBootApplication
@EnableDiscoveryClient
public class ProviderApplication {
	public static void main(String[] args) {
		SpringApplication.run(ProviderApplication.class, args);
	}
}

3.3 controller

package com.hl.magic.service;

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

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@RestController
public class TimeController {

	@GetMapping("/helloNacos")
	public String hellonacos() {
		return "hello, nacos! 时间：" + LocalDateTime.now().format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
	}
}

3.4 application.yaml配置

server:
  port: 10003

#nacos配置
spring:
  application:
    name: nacos-service-provider
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.0.103:8848

---

4. 服务消费者 4.1 pom.xml依赖

nacos-service-consumer服务提供者项目pom依赖

    
        Think-In-SpringCloud
        com.hl.magic
        1.0-SNAPSHOT
    
    4.0.0

    SpringCloud-Nacos-consumer
    服务消费者

    
        8
        8
        1.8
    
    
        
            org.springframework.cloud
            spring-cloud-starter-alibaba-nacos-discovery
        
    

---

4.2 入口主程序

ConsumerApplication.java

package com.hl.magic;

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


@SpringBootApplication
@EnableDiscoveryClient
public class ConsumerApplication {
	public static void main(String[] args) {
		SpringApplication.run(ConsumerApplication.class, args);
	}
}

4.3 controller

package com.hl.magic.controller;

import com.hl.magic.service.TimeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.HashMap;
import java.util.Map;


@RestController
public class FeignController {

	private RestTemplate restTemplate;
	@Autowired
	public void setRestTemplate(RestTemplate restTemplate) {
		this.restTemplate = restTemplate;
	}

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

	
	@GetMapping("/consumer")
	public String getMsg() {
		return restTemplate.getForObject("http://nacos-service-provider/helloNacos", String.class);
	}

}

4.4 application.yaml配置

server:
  port: 10002
spring:
  application:
    name: nacos-service-consumer
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.0.103:8848

---

5. 测试 5.1 启动nacos-server

(启动步骤略)

5.2 启动服务提供者

在IDEA中运行ProviderApplication.java入口主程序，在IDEA控制台上看到如下信息是，说明服务提供者已经注册完成。 

5.3启动服务消费者

在IDEA中运行ConsumerApplication.java入口主程序，在IDEA控制台上看到如下信息是，说明消费者服务已经注册完成。 

5.4 查看nacos服务列表 

5.5 浏览器访问测试

访问服务消费者: http://192.168.0.103:10002/consumer

返回结果如下：