nacos配置中心的配置

1、新建一个springBoot项目
引入依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>nacos-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nacos-demo</name>
    <description>nacos-demo</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--nacos配置中心 可以动态设置配置文件-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <!-- nacos服务注册与发现 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>

        <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR8</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.2.5.RELEASE</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>

2、设置application.yml

server:
  port: 9999

name: cs
aa: 1111

3、设置bootstrap.yml文件

spring:
  application:
    name: nacos-demo
  cloud:
    nacos:
      discovery:
        server-addr: ip:8848
      config:
        server-addr: ip:8848  # nacos地址
        file-extension: yaml #nacos后缀
        namespace: bd9e0954-9c93-427a-bb40-f649b262deda     #命名空间
        group: DEFAULT_GROUP  #nacos分组

（1）、设置命名空间

（2）添加配置

（3）可以看到读取的是nacos中的配置，不是本地配置的，实现动态配置

4、测试类

@Autowired
    Environment environment;
    @Test
    void contextLoads() throws InterruptedException {
        while(true){
            String name = environment.getProperty("name");
            String aa = environment.getProperty("aa");
            System.out.println("name:"+name+" aa:"+aa);
            TimeUnit.SECONDS.sleep(3);
        }
    }

5、设置公共配置

spring:
  application:
    name: nacos-demo
  cloud:
    nacos:
      discovery:
        server-addr: 101.43.140.220:8848
      config:
        server-addr: 101.43.140.220:8848  # nacos地址
        file-extension: yaml #nacos后缀
        namespace: bd9e0954-9c93-427a-bb40-f649b262deda     #命名空间
        group: DEFAULT_GROUP  #nacos分组
        shared-configs: #设置公共配置
          - common-log.yml
          - common-log1.yml
  profiles:  #nacos-demo-dev.yaml
    active: dev

6、设置扩展文件 extension-configs

spring:
  application:
    name: nacos-demo
  cloud:
    nacos:
      discovery:
        server-addr: 101.43.140.220:8848
      config:
        server-addr: 101.43.140.220:8848  # nacos地址
        file-extension: yaml #nacos后缀
        namespace: bd9e0954-9c93-427a-bb40-f649b262deda     #命名空间
        group: DEFAULT_GROUP  #nacos分组
        shared-configs: #设置公共配置
          - common-log.yml
          - common-log1.yml
        extension-configs[0]: #扩展文件
          dataId: nacos.yml
          refresh: true


  profiles:  #nacos-demo-dev.yaml
    active: dev

nacos配置加载顺序
文件名-prifile.扩展名 > 文件名.扩展名>文件名