继续学习SpringCloud Alibaba的Nacos，这里测试Nacos的config功能，首先启动nacos服务。

一、创建cloudalibaba-config-nacos-client3377工程

1 yml配置文件application.yml、bootstrap.yml

spring:
  profiles:
    active: dev  #表示开发环境

server:
  port: 3377
spring:
  application:
    name: nacos-config-client
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848  #nacos服务注册中心地址
      config:
        server-addr: localhost:8848  #nacos服务配置中心地址
        file-extension: yaml  #指定ymal格式的配置

# ${spring.application.name}-${spring.profile.active}.${spring.cloud.nacos.config.file-extension}
# nacos-config-client-dev.yaml

2 pom.xml

<?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">
    <parent>
        <artifactId>springcloud2021</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloudalibaba-config-nacos-client3377</artifactId>
    <dependencies>
        <!--   nacos config     -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <!--  SpringCloud alibaba nacos    -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--  web组件      -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

3 主启动类NacosConfigClientMain3377

@EnableDiscoveryClient
@SpringBootApplication
public class NacosConfigClientMain3377 {
          
   
    public static void main(String[] args) {
          
   
        SpringApplication.run(NacosConfigClientMain3377.class, args);
    }
}

4 ConfigClientController

@RestController
@RefreshScope  //通过springcloud原生注解@RefreshScope，实现配置自动更新
public class ConfigClientController {
          
   
    @Value("${config.info}")
    private String configInfo;

    @GetMapping("/config/info")
    public String getConfigInfo(){
          
   
        return configInfo;
    }
}

二、测试

1 Nacos创建配置nacos-config-client-dev.yaml spring.application.name值必须与Nacos中创建的配置Data Id匹配（除了.properties或者.yaml后缀）！ 2 访问http://localhost:3377/config/info进行测试 在nacos配置列表中修改nacos-config-client-dev.yaml中version=2，测试发现能够动态获取配置数据

三、项目代码及结构

项目结构