@ConfigurationProperties加载配置文件

使用@ConfigurationProperties加载配置文件

/mail
    |-mail.properties

==========================================================================================

spring.def.mail.host=mailhost
spring.def.mail.port=25

==========================================================================================

@Component
@PropertySource("classpath:mail/mail.properties")
@ConfigurationProperties(prefix = "spring.def.mail", ignoreUnknownFields = false)
@Data
public class MailConfig {

    private String host;

    private int port;

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.JSON_STYLE);
    }
}