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

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hsXzE4MDM_size_16_color_FFFFFF_t_70

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hsXzE4MDM_size_16_color_FFFFFF_t_70 1

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hsXzE4MDM_size_16_color_FFFFFF_t_70 2

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!";
        }
    }
}