SpringBoot2零基础到精通之profile功能与自定义starter

/**
 * @author : mereign
 * @date : 2022/3/12 - 20:55
 * @desc : service组件，内部定义了方法
 */
public class HelloService {

    @Autowired
    HelloProperties helloProperties;

    public String sayHello(String userName) {
        return helloProperties.getPrefix() + "：" + userName + "》" + helloProperties.getSuffix();
    }
}

/**
 * @author : mereign
 * @date : 2022/3/12 - 20:57
 * @desc :  配置文件的属性封装，默认自动导入容器中
 */
@ConfigurationProperties("com.xiaochen")
public class HelloProperties {

    private String prefix;
    private String suffix;

    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;
    }
}

/**
 * @author : mereign
 * @date : 2022/3/12 - 21:04
 * @desc : 一个自动配置类，决定是否向容器中注册service组件，以及配置文件绑定
 */

// 表明这是一个配置类
@Configuration
// 配置文件绑定
@EnableConfigurationProperties(HelloProperties.class)
public class HelloServiceAutoConfiguration {

	// 如果容器中没有这个组件就是用下面的方法进行容器的helloService组件注入，如果有的话就用容器中的
	@ConditionalOnMissingBean(HelloService.class)
    // 容器注入组件
    @Bean
    public HelloService helloService() {
        HelloService helloService = new HelloService();
        return helloService;
    }
}

<dependencies>
    <dependency>
        <groupId>com.xiaochen</groupId>
        <artifactId>test-autoconfigure</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
</dependencies>

<dependency>
    <groupId>com.xiaochen</groupId>
    <artifactId>test-starter</artifactId>
    <version>1.0-SNAPSHOT</version>
</dependency>

@RestController
public class HelloController {

    @Autowired
    HelloService helloService;

    @GetMapping("/hel")
    public String sayHello() {
        return helloService.sayHello("张三");
    }
}