那就跟以前一样在web.xml注册相应的servlet等信息即可
HelloServlet Servlet
import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet(name = "HelloServlet") public class HelloServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.getWriter().print("Hello Servlet"); } } import javax.servlet.*; import java.io.IOException; /** * 配置Hello请求的过滤器 */ public class HelloFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { System.out.println("Hello Filter ..."); chain.doFilter(request,response); } @Override public void destroy() { } }import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; /** * */ public class HelloListener implements ServletContextListener { @Override public void contextInitialized(ServletContextEvent sce) { System.out.println("Hello Listener init ..."); } @Override public void contextDestroyed(ServletContextEvent sce) { System.out.println("Hello Listener dead ..."); } }<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>demo</display-name> <!--配置Servlet--> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.fjut.springboot.servlet.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping> <!--配置过滤器--> <filter> <filter-name>HelloFilter</filter-name> <filter-class>com.fjut.springboot.servlet.HelloFilter</filter-class> </filter> <filter-mapping> <filter-name>HelloFilter</filter-name> <url-pattern>/hello</url-pattern> </filter-mapping> <!--配置监听器--> <listener> <listener-class>com.fjut.springboot.servlet.HelloListener</listener-class> </listener> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>... 2018-07-15 09:11:41.172 INFO 7504 --- [on(3)-127.0.0.1] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2018-07-15 09:11:41.172 INFO 7504 --- [on(3)-127.0.0.1] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'getDataSource' has been autodetected for JMX exposure 2018-07-15 09:11:41.181 INFO 7504 --- [on(3)-127.0.0.1] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'getDataSource': registering with JMX server as MBean [com.alibaba.druid.pool:name=getDataSource,type=DruidDataSource] 2018-07-15 09:11:41.198 INFO 7504 --- [on(3)-127.0.0.1] com.fjut.springboot.ServletInitializer : Started ServletInitializer in 4.597 seconds (JVM running for 8.654) Hello Listener init ... [2018-07-15 09:11:41,235] Artifact spring-boot-06-jdbc:war exploded: Artifact is deployed successfully [2018-07-15 09:11:41,236] Artifact spring-boot-06-jdbc:war exploded: Deploy took 7,728 milliseconds 15-Jul-2018 09:11:42.463 信息 [http-nio-8080-exec-3] org.apache.tomcat.util.http.parser.Cookie.logInvalidHeader A cookie header was received [1530005427,1530030667,1530059808; JSESSIONID=29BE6A814A0C05F2E3C9650B43DC8445] that contained an invalid cookie. That cookie will be ignored.Note: further occurrences of this error will be logged at DEBUG level. 15-Jul-2018 09:11:43.330 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [D:\Program Files\Tomcat 8.5\webapps\manager] 15-Jul-2018 09:11:43.376 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [D:\Program Files\Tomcat 8.5\webapps\manager] has finished in [46] ms Hello Filter ... Hello Filter ... "D:\Program Files\Tomcat 8.5\bin\catalina.bat" stop Using CATALINA_BASE: "C:\Users\LGX\.IntelliJIdea2018.1\system\tomcat\Unnamed_spring-boot-06-jdbc" Using CATALINA_HOME: "D:\Program Files\Tomcat 8.5" Using CATALINA_TMPDIR: "D:\Program Files\Tomcat 8.5\temp" Using JRE_HOME: "D:\Program Files\Java\jdk1.8.0_161" Using CLASSPATH: "D:\Program Files\Tomcat 8.5\bin\bootstrap.jar;D:\Program Files\Tomcat 8.5\bin\tomcat-juli.jar" 15-Jul-2018 09:12:52.726 信息 [main] org.apache.catalina.core.StandardServer.await A valid shutdown command was received via the shutdown port. Stopping the Server instance. 15-Jul-2018 09:12:52.726 信息 [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"] 15-Jul-2018 09:12:52.849 信息 [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"] 15-Jul-2018 09:12:52.966 信息 [main] org.apache.catalina.core.StandardService.stopInternal Stopping service [Catalina] 2018-07-15 09:12:52.972 INFO 7504 --- [ost-startStop-2] ConfigServletWebServerApplicationContext : Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@1461314: startup date [Sun Jul 15 09:11:37 CST 2018]; root of context hierarchy 2018-07-15 09:12:52.974 INFO 7504 --- [ost-startStop-2] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown 2018-07-15 09:12:52.974 INFO 7504 --- [ost-startStop-2] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans Hello Listener dead ... 15-Jul-2018 09:12:53.000 信息 [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"] 15-Jul-2018 09:12:53.001 信息 [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"] 15-Jul-2018 09:12:53.002 信息 [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"] 15-Jul-2018 09:12:53.003 信息 [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8009"] Disconnected from server由于SpringBoot默认是以jar包的方式启动嵌入式的Servlet容器来启动SpringBoot的web应用，没有web.xml文
件。
由于没有配置文件Spring Boot使用ServletRegistrationBean，FilterRegistrationBean，ServletListenerRegistrationBean分别用来注册Servlet，Filter，Listener。
对应的servlet，filter，listener跟前文的三大件一样
import com.fjut.springboot.servlet.HelloFilter; import com.fjut.springboot.servlet.HelloListener; import com.fjut.springboot.servlet.HelloServlet; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.boot.web.servlet.ServletListenerRegistrationBean; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import java.util.Arrays; @Configuration public class WebConfig { /** * 注册Servlet * @return */ @Bean public ServletRegistrationBean<HelloServlet> helloServletServlet(){ ServletRegistrationBean<HelloServlet> helloServlet = new ServletRegistrationBean<>(new HelloServlet(),"/hello"); return helloServlet; } /** * 注册Filter * @return */ @Bean public FilterRegistrationBean<HelloFilter> helloFilter(){ FilterRegistrationBean<HelloFilter> helloFilter = new FilterRegistrationBean<>(); helloFilter.setFilter(new HelloFilter()); helloFilter.setUrlPatterns(Arrays.asList("/hello")); return helloFilter; } /** * 注册Listener * @return */ @Bean public ServletListenerRegistrationBean<HelloListener> helloListener(){ ServletListenerRegistrationBean<HelloListener> helloListener = new ServletListenerRegistrationBean<>(new HelloListener()); return helloListener; } }