目錄

?

理論

演示及代碼

---

?

?

理論

在Spring Boot中使用下面3個函數可以注冊Servlet、Filter、Listener

ServletRegistrationBean

FilterRegistrationBean

ServletListenerRegistrationBean

?

演示及代碼

首先是Servlet請求：

注冊Filter后的現象：

注冊Listener的現象：

注意：

下面那個按鈕相當于正常退出，上面那個相當于拔電源。

?

程序結構如下：

MyServerConfig.java

package servlettestdemo.demo.config;import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer; import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer; 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 servlettestdemo.demo.filter.MyFilter; import servlettestdemo.demo.listener.MyListener; import servlettestdemo.demo.servlet.MyServlet;import javax.servlet.ServletContextListener; import java.util.Arrays;@Configuration public class MyServerConfig {//注冊三大組建@Beanpublic ServletRegistrationBean myServlet(){ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new MyServlet(),"/myServlet");return servletRegistrationBean;}@Beanpublic FilterRegistrationBean myFilter(){FilterRegistrationBean registrationBean = new FilterRegistrationBean();registrationBean.setFilter(new MyFilter());registrationBean.setUrlPatterns(Arrays.asList("/myServlet"));return registrationBean;}@Beanpublic ServletListenerRegistrationBean myListener(){ServletListenerRegistrationBean<MyListener> registrationBean = new ServletListenerRegistrationBean<>(new MyListener());return registrationBean;}//配置嵌入式Servlet容器@Beanpublic EmbeddedServletContainerCustomizer embeddedServletContainerCustomizer(){return new EmbeddedServletContainerCustomizer() {@Overridepublic void customize(ConfigurableEmbeddedServletContainer configurableEmbeddedServletContainer) {configurableEmbeddedServletContainer.setPort(10010);}};} }

MyFilter.java

package servlettestdemo.demo.filter;import javax.servlet.*; import java.io.IOException;public class MyFilter implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {System.out.println("MyFilter process ...");filterChain.doFilter(servletRequest, servletResponse);}@Overridepublic void destroy() {} }

MyListener.java

package servlettestdemo.demo.listener;import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener;public class MyListener implements ServletContextListener {@Overridepublic void contextInitialized(ServletContextEvent servletContextEvent) {System.out.println("contextInitialized ... web應用啟動");}@Overridepublic void contextDestroyed(ServletContextEvent servletContextEvent) {System.out.println("contextDestroyed ...web項目銷毀");} }

MyServlet.java

package servlettestdemo.demo.listener;import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener;public class MyListener implements ServletContextListener {@Overridepublic void contextInitialized(ServletContextEvent servletContextEvent) {System.out.println("contextInitialized ... web應用啟動");}@Overridepublic void contextDestroyed(ServletContextEvent servletContextEvent) {System.out.println("contextDestroyed ...web項目銷毀");} }

porn.xml

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.atguigu</groupId><artifactId>spring-boot-04-web-restfulcrud</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>spring-boot-04-web-restfulcrud</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.10.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><thymeleaf.version>3.0.9.RELEASE</thymeleaf.version><!-- 布局功能的支持程序 thymeleaf3主程序 layout2以上版本 --><!-- thymeleaf2 layout1--><thymeleaf-layout-dialect.version>2.2.2</thymeleaf-layout-dialect.version></properties><dependencies><!-- 引入web模塊 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--引入其他的Servlet容器--><!--<dependency><artifactId>spring-boot-starter-undertow</artifactId><groupId>org.springframework.boot</groupId></dependency>--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

?

總結

以上是生活随笔為你收集整理的Spring Boot注册Servlet三大组建（Servlet、Filter、Listener）的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。