Spring Cloud Alibaba教程 第二弹 Nacos配置管理

 

写在前面的话

更多Spring与微服务相关的教程请戳这里 ​​火力全开系列 Spring与微服务教程合集 持续更新​​

 

1、入门示例

1.1、nacos服务端

首先启动nacos，然后在nacos的配置列表页面，新增三个配置，分别是:

• nacos-client.yaml
• nacos-client-test.yaml
• nacos-client-prod.yaml

 

 

1.2、nacos客户端

1.2.1、pom.xml

    <properties>
        <spring-cloud-alibaba.version>2.0.2.RELEASE</spring-cloud-alibaba.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

 

1.2.2、bootstrap.yml

注意：

• nacos客户端会根据spring.application.name去找对应Data Id的配置，比如下面的配置，就会识别到nacos-client.yaml配置文件
• 并且，nacos客户端还会根据spring.profiles.active去找激活的配置，比如下面的配置，就会识别到nacos-client-test.yaml配置文件

spring:
  profiles:
    active: test
  application:
    name: nacos-client
  cloud:
    nacos:
      config:
        file-extension: yaml
        server-addr: 127.0.0.1:8848

 

1.2.3、controller

@RestController
public class ConfigController {

    @Value("${user.name}")
    private String username;

    @Value("${user.password}")
    private String password;

    @Value("${user.school}")
    private String school;

    @Value("${user.age}")
    private String age;

    @Value("${user.env}")
    private String env;

    @RequestMapping("/getConfig/{key}")
    public String getConfig(@PathVariable(value = "key") String key){
        if("username".equals(key)){
            return username;
        }else if("password".equals(key)){
            return password;
        }else if("school".equals(key)){
            return school;
        }else if("age".equals(key)){
            return age;
        }else if("env".equals(key)){
            return env;
        }else{
            return "the value is empty by this key!";
        }

    }

}