过滤器（Filter）和 监听器（Listener）的注册方法和 Servlet 一样;[email protected]@WebListener的方式完成
Filter
MyFilter.Java
package cn.wuyang.springboot.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
/**
* 使用注解标注过滤器
* @WebFilter将一个实现了javax.servlet.Filter接口的类定义为过滤器
* 属性filterName声明过滤器的名称,可选
* 属性urlPatterns指定要过滤 的URL模式,也可使用属性value来声明.(指定要过滤的URL模式是必选属性)
*
*/
@WebFilter(filterName="myFilter",urlPatterns="/*")
public class MyFilter implements Filter {
@Override
public void destroy() {
System.out.println("过滤器销毁");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
System.out.println("执行过滤操作");
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8");
chain.doFilter(request, response);
}
@Override
public void init(FilterConfig arg0) throws ServletException {
System.out.println("过滤器销毁");
}
}
Listener
MyHttpSessionListener.java
package cn.wuyang.springboot.listener;
import javax.servlet.annotation.WebListener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
@WebListener
public class MyHttpSessionListener implements HttpSessionListener {
@Override
public void sessionCreated(HttpSessionEvent arg0) {
System.out.println("Session 被创建");
}
@Override
public void sessionDestroyed(HttpSessionEvent arg0) {
System.out.println("ServletContex初始化");
}
}
MyServletContextListener.java
package cn.wuyang.springboot.listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class MyServletContextListener implements ServletContextListener {
@Override
public void contextDestroyed(ServletContextEvent arg0) {
System.out.println("ServletContex销毁");
}
@Override
public void contextInitialized(ServletContextEvent arg0) {
System.out.println("ServletContex初始化");
System.out.println(arg0.getServletContext().getServerInfo());
}
}
运行启动访问页面后台 console输出
. ____ _ __ _ _
/// / ___'_ __ _ _(_)_ __ __ _ / / / /
( ( )/___ | '_ | '_| | '_ // _` | / / / /
/// ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_/__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.6.RELEASE)
2017-08-16 14:42:51.708 INFO 136708 --- [ main] cn.wuyang.springboot.DemoApplication : Starting DemoApplication on DESKTOP-PARJK8F with PID 136708 (D:/eclipse_spring_boot/sts-bundle/sts-3.9.0.RELEASE/workspace/demo/target/classes started by wuyang in D:/eclipse_spring_boot/sts-bundle/sts-3.9.0.RELEASE/workspace/demo)
2017-08-16 14:42:51.710 INFO 136708 --- [ main] cn.wuyang.springboot.DemoApplication : No active profile set, falling back to default profiles: default
2017-08-16 14:42:51.745 INFO 136708 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6b0c2d26: startup date [Wed Aug 16 14:42:51 CST 2017]; root of context hierarchy
2017-08-16 14:42:52.547 INFO 136708 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-08-16 14:42:52.563 INFO 136708 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-08-16 14:42:52.563 INFO 136708 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16
2017-08-16 14:42:52.714 INFO 136708 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2017-08-16 14:42:52.716 INFO 136708 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-08-16 14:42:52.716 INFO 136708 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 971 ms
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'cn.wuyang.springboot.servlet.MyServlet' to [/myservlet]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-08-16 14:42:52.832 INFO 136708 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'myFilter' to urls: [/*]
ServletContex初始化
Apache Tomcat/8.5.16
过滤器销毁
2017-08-16 14:42:53.064 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6b0c2d26: startup date [Wed Aug 16 14:42:51 CST 2017]; root of context hierarchy
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello/info]}" onto public java.util.Map<java.lang.String, java.lang.String> cn.wuyang.springboot.controller.HelloController.getInfo(java.lang.String)
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello]}" onto public java.lang.String cn.wuyang.springboot.controller.HelloController.hello()
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello/list]}" onto public java.util.List<java.util.Map<java.lang.String, java.lang.String>> cn.wuyang.springboot.controller.HelloController.getList()
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/page/ || /page/index]}" onto public java.lang.String cn.wuyang.springboot.controller.PageController.index(java.util.Map<java.lang.String, java.lang.Object>)
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/page/page2]}" onto public java.lang.String cn.wuyang.springboot.controller.PageController.page2(org.springframework.ui.Model)
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/page/page1]}" onto public org.springframework.web.servlet.ModelAndView cn.wuyang.springboot.controller.PageController.page1()
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-08-16 14:42:53.095 INFO 136708 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-08-16 14:42:53.117 INFO 136708 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-08-16 14:42:53.117 INFO 136708 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-08-16 14:42:53.148 INFO 136708 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-08-16 14:42:53.264 INFO 136708 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-08-16 14:42:53.318 INFO 136708 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-08-16 14:42:53.333 INFO 136708 --- [ main] cn.wuyang.springboot.DemoApplication : Started DemoApplication in 1.804 seconds (JVM running for 2.68)
2017-08-16 14:42:56.903 INFO 136708 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-08-16 14:42:56.903 INFO 136708 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-08-16 14:42:56.919 INFO 136708 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 16 ms
执行过滤操作
Hello application wuyang
Session 被创建
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/11263.html