spring自定义一个简单的Starter启动器

<parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.4.5</version>
</parent>
<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <!--注解处理器:生成配置元数据-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
</dependencies>

package com.test.MyCode;
public class HelloWorld {
    public String sayHello(){
        return "helloWord";
    }
}

package com.test.config;
import com.test.MyCode.HelloWorld;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class HelloWordConfiguration {
    @Bean
    public HelloWorld helloWorld(){
        return new HelloWorld();
    }
}

# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.test.config.HelloWordConfiguration