[十三]SpringBoot 之 过滤器（Filter）和监听器（Listener）

过滤器（Filter）和 监听器（Listener）的注册方法和 Servlet 一样，不清楚的可以查看下上一篇文章

代码示例

package me.shijunjie.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;

@WebFilter(filterName="myFilter",urlPatterns="/*")

public class MyFilter implements Filter {

    @Override

    public void init(FilterConfig arg0) throws ServletException {

        System.out.println("MyFilter init");

    }

    @Override

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

            throws IOException, ServletException {

        System.out.println("MyFilter doFilter");

        chain.doFilter(request, response);

    }

    @Override

    public void destroy() {

        System.out.println("MyFilter destroy");

    }

}

package me.shijunjie.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("MyHttpSessionListener sessionCreated");

    }

    @Override

    public void sessionDestroyed(HttpSessionEvent arg0) {

        System.out.println("MyHttpSessionListener sessionDestroyed");

    }

}

package me.shijunjie.listener;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

import javax.servlet.annotation.WebListener;

@WebListener

public class MyServletContextListener implements ServletContextListener {

    @Override

    public void contextInitialized(ServletContextEvent arg0) {

        System.out.println("ServletContex contextInitialized");

    }

    @Override

    public void contextDestroyed(ServletContextEvent arg0) {

         System.out.println("ServletContex contextDestroyed");

    }

}

package me.shijunjie.testspringboot2;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletComponentScan;

/**

 * Hello world!

 *

 */

@SpringBootApplication

@ServletComponentScan("me.shijunjie")

public class App

{

    /* *//**

     * 注册Servlet.不需要添加注解：@ServletComponentScan

     * @return

     *//*

    @Bean

    public ServletRegistrationBean myServlet1(){

           return new ServletRegistrationBean(new MyServlet1(),"/myServlet/*");

    }*/

    public static void main( String[] args )

    {

        SpringApplication.run(App.class, args);

    }

}