Spring Cloud Alibaba教程第二弹 Nacos配置管理

今天药忘吃喽~ 2022-12-13 14:24 174阅读 0赞

**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][Spring_]

# 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

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## 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!";
            }
    
        }
    
    }

[Spring_]: https://blog.csdn.net/xl_1803/article/details/109462842
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