<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter</artifactId>
  <version>2.5.3</version>
  <scope>compile</scope>
</dependency>

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-autoconfigure</artifactId>
  <version>2.5.3</version>
  <scope>compile</scope>
</dependency>

<dependencies>
    <dependency>
        <groupId>com.wang</groupId>
        <artifactId>spring-boot-autoconfigure</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
</dependencies>

<properties>
    <java.version>1.8</java.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <version>${spring-boot.version}</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.24</version>
    </dependency>
</dependencies>

/**
 * 這里不需要讓在容器中，我們寫(xiě)一個(gè)自己配置，讓他自動(dòng)加入到容器中
 * @author wangzhenjun
 * @date 2022/10/14 16:26
 */
public class HelloService {

    @Autowired
    private MyProperties myProperties;

    public String HelloWord (String username){
        return myProperties.getPrefix() + username + myProperties.getSuffix();
    }
}

/**
 * @author wangzhenjun
 * @date 2022/10/14 16:28
 */
@Data
@ConfigurationProperties("wang.name")
public class MyProperties {

    private String prefix;
    private String suffix;
}

import com.wang.springbootautoconfigure.properties.MyProperties;
import com.wang.springbootautoconfigure.service.HelloService;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author wangzhenjun
 * @date 2022/10/14 16:33
 */
@Configuration
//沒(méi)有這個(gè)bean的時(shí)候才會(huì)生效
@ConditionalOnMissingBean(HelloService.class)
// 加載配置文件，讓它成為容器中的bean
@EnableConfigurationProperties(MyProperties.class)
public class ServiceAutoConfiguration {
    /**
     * 把剛剛寫(xiě)的服務(wù)，加入到容器中
     */
    @Bean
    public HelloService helloService (){

        return new HelloService();
    }
}

<dependency>
    <groupId>com.wang</groupId>
    <artifactId>spring-boot-starter</artifactId>
    <version>1.0-SNAPSHOT</version>
</dependency>

wang:
 name:
  prefix: hello
  suffix: 886

@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private HelloService helloService;

    @GetMapping("/starter")
    public String starter(){

        return helloService.HelloWord("tom");
    }
}