一，下载Nacos 

下载地址：https://github.com/alibaba/nacos/releases

二，启动Nacos

安装Nacos的bin目录下，

执行：startup.cmd -m standalone

然后打开上图红框的地址

三，配置服务

1 配置Nacos

创建命名空间（无论本地还是测试服务期，全部注册到Nacos上，通过命名空间可以区分本地还是测试服务器的服务）

2 创建一个配置文件

test.yml：

记得选择 YAML

spring:datasource:url: jdbc:mysql://localhost:3306/test1?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=UTCusername: rootpassword: rootname: hello wrold!!!

 

四，编写项目

1 项目结构

一个父的pom，一个子项目

父pom

<?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 https://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>3.0.2</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.test</groupId><artifactId>nacos_test</artifactId><version>0.0.1-SNAPSHOT</version><packaging>pom</packaging><name>nacos_test</name><description>nacos_test</description><modules><module>test1</module></modules><properties><java.version>17</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- Web依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- 日志依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-logging</artifactId></dependency><!-- Lombok工具 --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.30</version><scope>provided</scope></dependency><!-- Actuator可以帮助你监控和管理Spring Boot应用 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- 热部署 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</artifactId><version>3.0.2</version></dependency></dependencies><dependencyManagement><dependencies><!--Spring Cloud Alibaba微服务组件的依赖--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2022.0.0.0</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

2 子项目（test1）

pom

<?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>com.test</groupId><artifactId>nacos_test</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test1</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><!-- mybatis--><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.4.1</version></dependency><!-- pojo持久化使用 --><dependency><groupId>jakarta.persistence</groupId><artifactId>jakarta.persistence-api</artifactId><version>3.1.0</version></dependency><!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><version>8.2.0</version></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- 引入alibaba-nacos-config依赖，可以从Nacos配置中心获得配置信息 --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId><version>4.0.4</version></dependency></dependencies>
</project>

resource下，创建bootstrap.yml（不是application.yml）

这个yml会找到nacos中，我们前面创建的test.yml

server:port: 3000
spring:application:name: test1cloud:nacos:discovery:server-addr: 127.0.0.1:8848   #注册中心地址namespace: local_test         #命名空间config:file-extension: yaml          #文件后缀，只支持 properties 和 yamlprefix: test                  #文件名namespace: local_test         #命名空间auto-refresh: trueenable-remote-sync-config: true  #启用远程同步配置timeout: 3000group: DEFAULT_GROUP          #配置组refresh-enabled: trueserver-addr: 127.0.0.1:8848   #配置中心地址

启动项：

package com.test;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class Main {public static void main(String[] args) {SpringApplication.run(Main.class,args);}
}

API：

package com.test.api;import com.alibaba.nacos.api.model.v2.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.*;@RestController
@RequestMapping("api/test")
@RefreshScope
public class ApiTestController {@Value("${name}")private String name;@RequestMapping(value = "test1", method = RequestMethod.GET)@ResponseBodypublic Result test1(){return Result.success(name);}
}

五，测试

访问：http://localhost:3000/api/test/test1

结果：

{"code":0,"message":"success","data":"hello wrold!!!"}

修改nacos中test.yml （无需重启服务）

name: hello!!!

结果：

{"code":0,"message":"success","data":"hello!!!"}