是這個(gè)依賴

<dependency>
???<groupId>org.springframework.boot</groupId>
???<artifactId>spring-boot-configuration-processor</artifactId>
???<optional>true</optional>
</dependency>

然后，打印結(jié)果截圖：

Hello!?SpringBoot?!?nullnull

這個(gè)是源代碼：

@Component
@ConfigurationProperties(prefix = "girl")
public class GirlProperties {
? ?private String cupSize;

? ?private Integer age;

以下是get、set方法

然后還有控制類的代碼：

@RestController
public class ?helloController {

? ?@Autowired
? ?private GirlProperties girlProperties;

? ?@RequestMapping(value = "/hello",method = RequestMethod.GET )
? ?public String say(){
? ? ? ?return "Hello! SpringBoot ! "+girlProperties.getCupSize()+girlProperties.getAge();
? ?}