java@ConfigurationProperties在控制器注释类中工作，但在组件类中不工作

Question

我已经为下面的配置创建了一个WebserviceCredentials类，并在@component类中使用@autowired for WebserviceCredentials。它不起作用（显示空值），但在@restcontroller类中使用时，它起作用，感谢您的帮助

@Component
@ConfigurationProperties(prefix="webservice")
public class WebserviceCredentials {

    @Value("${webservice.EndPoint}")
    private String webserviceEndpoint;
    @Value("${webservice.Username}")
    private String username;
    @Value("${webservice.Password}")
    private String password;

    public String getwebserviceEndpoint() {
        return webserviceEndpoint;
    }
    public void setwebserviceEndpoint(String webserviceEndpoint) {
        this.webserviceEndpoint = webserviceEndpoint;
    }

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }


}

Answer 1

@ConfigurationProperties（prefix=“webservice”）应该位于表示属性文件的POJO上。要在WebServiceRedentials类中使用它，可以使用

public class WebserviceCredentials {
  @Autowire 
  private ConfigurationProperties configurationProperties;
  //the rest of your code
}

你可以参考我最近发布的这个链接

Mapping YMAL properties

Answer 2

设置与如何使用ConfigurationProperties无关

@ConfigurationProperties(prefix="webservice")
public class WebserviceCredentials {
private String endpoint;
private String username;
private String password;

public String getEndpoint() {
    return endpoint;
}
public void setEndpoint(String endpoint) {
    this.endpoint = endpoint;
}

public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
}

然后将@EnableConfigurationProperties(WebserviceCredentials.class)添加到Configuration或主应用程序类中

详见https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config-typesafe-configuration-properties