SpringBoot默认使用Tomcat作为嵌入式的Servlet容器

【串线篇】spring boot配置嵌入式servlet容器-LMLPHP

问题?

一、如何定制和修改Servlet容器的相关配置

1、方法1修改和server有关的配置(ServerProperties【也是EmbeddedServletContainerCustomizer】)

server.port=8081
server.context‐path=/crud server.tomcat.uri‐encoding=UTF‐8 //通用的Servlet容器设置
server.xxx
//Tomcat的设置
server.tomcat.xxx

2、方法2新建一个config类

编写一个EmbeddedServletContainerCustomizer:嵌入式的Servlet容器的定制器;来修改Servlet容器的配置

@Bean //一定要将这个定制器加入到容器中
public EmbeddedServletContainerCustomizer embeddedServletContainerCustomizer(){
return new EmbeddedServletContainerCustomizer() { //定制嵌入式的Servlet容器相关的规则
@Override
public void customize(ConfigurableEmbeddedServletContainer container) { container.setPort(8083);
}
}
}

二、注册Servlet三大组件【Servlet、Filter、Listener】

由于SpringBoot默认是以jar包的方式启动嵌入式的Servlet容器(即嵌入式的tomcat)

来启动SpringBoot的web应用,没有web.xml文件。

1.新建这三个servlet类

2.注册三大组件用以下方式新建一个config类,在这个配置类里传入自己的servlet

ServletRegistrationBeanServlet

    //注册三大组件
@Bean
public ServletRegistrationBean myServlet(){
ServletRegistrationBean registrationBean = new ServletRegistrationBean(new MyServlet(),"/myServlet");
return registrationBean; 6
}

FilterRegistrationBeanFilter

    @Bean
public FilterRegistrationBean myFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new MyFilter());
registrationBean.setUrlPatterns(Arrays.asList("/hello","/myServlet"));
return registrationBean; 7 }

ServletListenerRegistrationBeanListener

    @Bean
public ServletListenerRegistrationBean myListener(){
ServletListenerRegistrationBean<MyListener> registrationBean = new ServletListenerRegistrationBean<>(new MyListener());
return registrationBean; 5
}

SpringBoot帮我们自动SpringMVC的时候,自动的注册SpringMVC的前端控制器;DIspatcherServlet;

DispatcherServletAutoConfiguration中:

@Bean(name  =  DEFAULT_DISPATCHER_SERVLET_REGISTRATION_BEAN_NAME)
@ConditionalOnBean(value = DispatcherServlet.class, name = DEFAULT_DISPATCHER_SERVLET_BEAN_NAME)
public ServletRegistrationBean dispatcherServletRegistration( DispatcherServlet dispatcherServlet) {
ServletRegistrationBean registration = new ServletRegistrationBean(
//默认拦截: / 所有请求;包静态资源,但是不拦截jsp请求;/*会拦截jsp
//可以通过server.servletPath来修改SpringMVC前端控制器默认拦截的请求路径 registration.setName(DEFAULT_DISPATCHER_SERVLET_BEAN_NAME); registration.setLoadOnStartup(
this.webMvcProperties.getServlet().getLoadOnStartup()); if (this.multipartConfig != null) {
registration.setMultipartConfig(this.multipartConfig);
}
return registration;
}

三、替换为其他嵌入式Servlet容器

(默认是嵌入Tomcat)

【串线篇】spring boot配置嵌入式servlet容器-LMLPHP

默认支持:

Tomcat(默认使用)

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
引入web模块默认就是使用嵌入式的Tomcat作为Servlet容器;
</dependency>

Jetty

<!‐‐ 引入web模块 ‐‐>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
<exclusions>
<exclusion>
<artifactId>spring‐boot‐starter‐tomcat</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency> <!‐‐引入其他的Servlet容器‐‐>
<dependency>
<artifactId>spring‐boot‐starter‐jetty</artifactId>
<groupId>org.springframework.boot</groupId>
</dependency>

Undertow

    <!‐‐ 引入web模块 ‐‐>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
<exclusions>
<exclusion>
<artifactId>spring‐boot‐starter‐tomcat</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency> <!‐‐引入其他的Servlet容器‐‐>
<dependency>
<artifactId>spring‐boot‐starter‐undertow</artifactId>
<groupId>org.springframework.boot</groupId>
</dependency>
05-11 18:26