SpringBoot server.port配置原理详解

@ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)
public class ServerProperties { 
	
	private Integer port;

public class WebServerFactoryCustomizerBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware { 
 private ListableBeanFactory beanFactory; 
 private List<WebServerFactoryCustomizer<?>> customizers; 
 
 @Override
 public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
  if (bean instanceof WebServerFactory) {
   postProcessBeforeInitialization((WebServerFactory) bean);
  }
  return bean;
 } 
 
 @SuppressWarnings("unchecked")
 private void postProcessBeforeInitialization(WebServerFactory webServerFactory) {
  LambdaSafe.callbacks(WebServerFactoryCustomizer.class, getCustomizers(), webServerFactory)
    .withLogger(WebServerFactoryCustomizerBeanPostProcessor.class)
    .invoke((customizer) -> customizer.customize(webServerFactory));
 }
 
    private Collection<WebServerFactoryCustomizer<?>> getCustomizers() {
  if (this.customizers == null) {
   // Look up does not include the parent context
   this.customizers = new ArrayList<>(getWebServerFactoryCustomizerBeans());
   this.customizers.sort(AnnotationAwareOrderComparator.INSTANCE);
   this.customizers = Collections.unmodifiableList(this.customizers);
  }
  return this.customizers;
 }
 
 @SuppressWarnings({ "unchecked", "rawtypes" })
 private Collection<WebServerFactoryCustomizer<?>> getWebServerFactoryCustomizerBeans() {
  return (Collection) this.beanFactory.getBeansOfType(WebServerFactoryCustomizer.class, false, false).values();
 }

beanFactory.getBeansOfType(WebServerFactoryCustomizer.class, false, false).values()

@Configuration
@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
@ConditionalOnClass(ServletRequest.class)
@ConditionalOnWebApplication(type = Type.SERVLET)
@EnableConfigurationProperties(ServerProperties.class)
@Import({ ServletWebServerFactoryAutoConfiguration.BeanPostProcessorsReGIStrar.class,
  ServletWebServerFactoryConfiguration.EmbeddedTomcat.class,
  ServletWebServerFactoryConfiguration.EmbeddedJetty.class,
  ServletWebServerFactoryConfiguration.EmbeddedUndertow.class })
public class ServletWebServerFactoryAutoConfiguration {
 
 @Bean
 public ServletWebServerFactoryCustomizer servletWebServerFactoryCustomizer(ServerProperties serverProperties) {
  return new ServletWebServerFactoryCustomizer(serverProperties);
 }

#读取环境配置dev(开发)/pro(生产)/test(测试)
spring.profiles.active=dev