那个网站可以做考卷,wordpress tag生成的链接乱,wordpress 增加用户字段,制作一个网站并上传访问目录 1. 自动配置原理2. 自定义嵌入式容器3. 最佳实践 Servlet容器#xff1a;管理、运行Servlet组件#xff08;Servlet、Filter、Listener#xff09;的环境#xff0c;一般指服务器 1. 自动配置原理
SpringBoot默认嵌入Tomcat作为Servlet容器自动配置类是ServletWebSer… 目录 1. 自动配置原理2. 自定义嵌入式容器3. 最佳实践 Servlet容器管理、运行Servlet组件Servlet、Filter、Listener的环境一般指服务器 1. 自动配置原理
SpringBoot默认嵌入Tomcat作为Servlet容器自动配置类是ServletWebServerFactoryAutoConfiguration、EmbeddedWebServerFactoryCustomizerAutoConfiguration从自动配置类开始分析功能。如xxxxAutoConfiguration
先分析ServletWebServerFactoryAutoConfiguration自动配置类
......省略部分......
AutoConfiguration(after {SslAutoConfiguration.class}
)
AutoConfigureOrder(Integer.MIN_VALUE)
ConditionalOnClass({ServletRequest.class})
ConditionalOnWebApplication(type Type.SERVLET
)
EnableConfigurationProperties({ServerProperties.class})
Import({BeanPostProcessorsRegistrar.class, ServletWebServerFactoryConfiguration.EmbeddedTomcat.class, ServletWebServerFactoryConfiguration.EmbeddedJetty.class, ServletWebServerFactoryConfiguration.EmbeddedUndertow.class})
public class ServletWebServerFactoryAutoConfiguration {
......省略部分......
}ServletWebServerFactoryAutoConfiguration自动配置了嵌入式容器场景绑定了ServerProperties配置类所有和服务器有关的配置都是server开头和tomcat有关的配置都是server.tomcat开头ServletWebServerFactoryAutoConfiguration导入了嵌入式的三大服务器 Tomcat、Jetty、Undertow 1.导入Tomcat、Jetty、Undertow都有条件注解。系统中有这个类才行也就是导了这个包 2.默认 Tomcat配置生效。给容器中放了TomcatServletWebServerFactory这是一个 web服务器工厂造web服务器的
......省略部分......Configuration(proxyBeanMethods false)ConditionalOnClass({Servlet.class, Tomcat.class, UpgradeProtocol.class})ConditionalOnMissingBean(value {ServletWebServerFactory.class},search SearchStrategy.CURRENT)static class EmbeddedTomcat {EmbeddedTomcat() {}BeanTomcatServletWebServerFactory tomcatServletWebServerFactory(ObjectProviderTomcatConnectorCustomizer connectorCustomizers, ObjectProviderTomcatContextCustomizer contextCustomizers, ObjectProviderTomcatProtocolHandlerCustomizer? protocolHandlerCustomizers) {......省略部分......}......省略部分......}
......省略部分......3.web服务器工厂 都有一个功能getWebServer获取web服务器 4.TomcatServletWebServerFactory创建了tomcat
......省略部分......
public class TomcatServletWebServerFactory extends AbstractServletWebServerFactory implements ConfigurableTomcatWebServerFactory, ResourceLoaderAware {......省略部分......public WebServer getWebServer(ServletContextInitializer... initializers) {......省略部分......Tomcat tomcat new Tomcat();......省略部分......}
......省略部分......
}ServletWebServerApplicationContextioc容器启动的时候createWebServer方法会调用TomcatServletWebServerFactory.getWebServer创建web服务器Spring容器刷新(启动)的时候执行经典的十二大步会预留一个时机调用onRefresh()刷新子容器
......省略部分......
public class ServletWebServerApplicationContext extends GenericWebApplicationContextimplements ConfigurableWebServerApplicationContext {......省略部分......Overrideprotected void onRefresh() {super.onRefresh();try {createWebServer();}catch (Throwable ex) {throw new ApplicationContextException(Unable to start web server, ex);}}......省略部分......
}经典的十二大步调用
......省略部分......
public abstract class AbstractApplicationContext extends DefaultResourceLoaderimplements ConfigurableApplicationContext {......省略部分......Overridepublic void refresh() throws BeansException, IllegalStateException {synchronized (this.startupShutdownMonitor) {......省略部分......try {// Allows post-processing of the bean factory in context subclasses.postProcessBeanFactory(beanFactory);StartupStep beanPostProcess this.applicationStartup.start(spring.context.beans.post-process);// Invoke factory processors registered as beans in the context.invokeBeanFactoryPostProcessors(beanFactory);// Register bean processors that intercept bean creation.registerBeanPostProcessors(beanFactory);beanPostProcess.end();// Initialize message source for this context.initMessageSource();// Initialize event multicaster for this context.initApplicationEventMulticaster();// Initialize other special beans in specific context subclasses.onRefresh();// Check for listener beans and register them.registerListeners();// Instantiate all remaining (non-lazy-init) singletons.finishBeanFactoryInitialization(beanFactory);// Last step: publish corresponding event.finishRefresh();}......省略部分......}......省略部分......
}总结Web场景的Spring容器启动在onRefresh的时候会调用创建web服务器的方法。Web服务器的创建是通过WebServerFactory搞定的。容器中又会根据导人员的包进行条件注解启动相关的服务器配置默认EmbeddedTomcat会给容器中放一个TomcatServletWebServerFactory进行项目启动自动创建出Tomcat
2. 自定义嵌入式容器
切换嵌入式服务器。如下所示 properties!-- springboot3使用jakarta-servlet 6但是jetty使用jakarta-servlet 5- --jakarta-servlet.version5.0.0/jakarta-servlet.version/propertiesdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactIdexclusionsexclusiongroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-tomcat/artifactId/exclusion/exclusions/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-jetty/artifactId/dependency/dependencies3. 最佳实践
用法
修改server下的相关配置就可以修改服务器参数通过给容器中放一个ServletWebServerFactory来禁用掉SpringBoot默认放的服务器工厂实现自定义嵌入任意服务器
