Application.properties file configuration:

spring.application.name=service-provider
server.port=8081

spring.cloud.nacos.discovery.service=${spring.application.name}
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

nacos configuration:

note! ! ! !At the beginning, I named the Data Id of the nacos configuration center service-provider.properties, and the value of my spring.application.name property was service-provider, which caused the reading to fail. When I changed the value of spring.application.name change into

service-provider.properties was read successfully,So pay attention to spring.application.name and data id must be consistent

The following code of the control layer is as follows:

@RestController
@RefreshScope
public class ProviderController {

    @Value("${str}")
    private String java;

    @RequestMapping("/getConfig")
    public String getConfig() {
        return java;
    }
}

pom file

<dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <type>pom</type>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-nacos-discovery -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${springboot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
            <version>${springboot.version}</version>
        </dependency>