spring @ConfigurationProperties

@Configuration
@EnableConfigurationProperties
public class PropertiesConfig {

    @Bean
    @ConfigurationProperties(prefix = "pay")
    public PayVersion version(){
        return new PayVersion();
    }

}

public class PayVersion {
    private String version;

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }
}

yml 文件
 

pay:
  version: 1.0.0