server.port=9000

amazon.associateId=habuma-20

@Component

//指定配置文件的地址

@PropertySource("classpath:application.properties")

//指定配置文件的前缀

@ConfigurationProperties(prefix = "amazon")

public class AmazonProperties {

    public String getAssociateId() {

        return associateId;

    }

    //直接根据properties里面的变量名赋值

    //等值于 @Value

    public void setAssociateId(String associateId) {

        this.associateId = associateId;

    }

    private String associateId;

}

@SpringBootApplication

@EnableConfigurationProperties

public class DemoApplication {

    private static AmazonProperties amazonProperties;

    @Autowired

    private void setAmazonProperties(AmazonProperties amazonProperties){

        this.amazonProperties = amazonProperties;

    }

    public static void main(String[] args) {

        SpringApplication.run(DemoApplication.class, args);

        System.out.println(amazonProperties.getAssociateId());

    }

}