<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter</artifactId>
</dependency>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>top.huashengshu</groupId>
    <artifactId>my-spring-boot-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>my-spring-boot-starter</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <!--   保留這個(gè)依賴即可，其它依賴都刪除     -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

    </dependencies>
</project>

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "hello") // 對(duì)外提供的前綴，相當(dāng)于其它引入當(dāng)前starter在properties文件使用hello.屬性即可對(duì)下面屬性進(jìn)行賦值
public class HelloProperties {

    private String prefix; // 成員屬性，意思是前綴名
    private String suffix; // 成員屬性，意思是后綴名

    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    public String getSuffix() {
        return suffix;
    }

    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }
}

public class HelloService {

    HelloProperties helloProperties;

    public HelloProperties getHelloProperties() {
        return helloProperties;
    }

    public void setHelloProperties(HelloProperties helloProperties) {
        this.helloProperties = helloProperties;
    }

    public String sayHello(String name){
        return helloProperties.getPrefix() +" "+name +" "+helloProperties.getSuffix();
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConditionalOnWebApplication    // 條件配置類，該注解表示在web環(huán)境下才生效，相關(guān)的其它條件可以使用@ConditionXXX
@EnableConfigurationProperties(HelloProperties.class) // 表示HelloProperties作為配置類使用
public class HelloServiceAutoConfiguration {

    @Autowired
    HelloProperties helloProperties;	// 作為配置類目的就是想在sayHello方法返會(huì)的字符串加上前綴和后綴

    @Bean
    public HelloService helloService() { // 將HelloService注入到IOC容器
        HelloService service = new HelloService();
        service.setHelloProperties(helloProperties);
        return service;
    }
}

org.springframework.boot.autoconfigure.EnableAutoConfiguration=

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
top.huashengshu.myspringbootstarter.HelloServiceAutoConfiguration,\
top.yumbo.music.starter.configuration.YumboMusicAutoConfiguration

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import top.huashengshu.myspringbootstarter.HelloService;

@SpringBootApplication
public class DemoApplication {
	
    @RestController
    public class HelloController {

        @Autowired
        HelloService helloService; // 注入HelloService

        @GetMapping("/hello") // 暴露一個(gè)/hello 請(qǐng)求路徑對(duì)外提供服務(wù)
        public String hello(){
            return helloService.sayHello("zhang san"); // 返回帶有前綴和后綴中間是 "zhang san"的字符串
        }

    }
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

hello.prefix=HUASHENGSHU
hello.suffix=Hello World