是什么

SpringCloud Config为微服务架构中的微服务提供集中化的外部支持，配置服务器为各个不同微服务应用的所有环境提供了一个中心化配置。

能干嘛

• 集中管理配置文件
• 不同环境配置，动态化的配置更新，分环境部署比如dev/test/prod/beta等
• 运行期间动态调整配置，不再需要在每一个服务部署的机器上编写配置文件
• 当配置发生变化时，服务不需要重启即可感知到配置的变化并应用新的配置
• 将配置信息以REST接口的形式暴露

代码实现

1，首先在码云上创建一个项目

2，本地idea创建好gitee的用户名和密码

3，新建一个模块cloud-config-center-3344

引入依赖

 <dependencies>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>

        <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>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

    </dependencies>

配置yml

server:
  port: 3344


spring:
  application:
    name: cloud-config-center
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/yang-jie-1577/cloud-config-center.git
          search-paths:
            # 仓库名称
            - springcloud-config
      label: master

eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka

主启动

@SpringBootApplication
@EnableConfigServer
public class ConfigCenterMain3344 {

    public static void main(String[] args) {
        SpringApplication.run(ConfigCenterMain3344.class,args);
    }

}

创建config客户端模块cloud-config-client-3355

引入依赖

```java
<dependencies>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

        <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>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

    </dependencies>

配置文件

```java
server:
  port: 3355

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config # 配置文件名称
      profile: dev # 读取后缀名称
      uri: http://localhost:3344 # 配置中心地址

eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka

management:
  endpoints:
    web:
      exposure:
        include: "*"

业务类

@RestController
@RefreshScope
public class ConfigClientController {

    @Value("${config.info}")
    private String info;

    @GetMapping("/configInfo")
    public String getInfo() {
        return this.info;
    }

}

主启动

server:
  port: 3355

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config # 配置文件名称
      profile: dev # 读取后缀名称
      uri: http://localhost:3344 # 配置中心地址

eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka

management:
  endpoints:
    web:
      exposure:
        include: "*"