springboot過濾器和攔截器以及監聽器的代碼怎么寫

springboot過濾器和攔截器以及監聽器的代碼怎么寫，相信很多沒有經驗的人對此束手無策，為此本文總結了問題出現的原因和解決方法，通過這篇文章希望你能解決這個問題。

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簡單的springboot 過濾器，攔截器，監聽器使用

pom.xml

<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>sp</groupId>
<artifactId>spboot</artifactId>
<version>0.0.1-SNAPSHOT</version>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>

<dependencies>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

過濾器，使用的servlet3 規范

package com.soft.m;

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;
import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@WebFilter(filterName="MyFilter",urlPatterns="/*")
public class MyFilter implements Filter {
private static Logger LOG = LoggerFactory.getLogger(MyFilter.class);
   public void init(FilterConfig filterConfig) throws ServletException {
       LOG.info("初始化過濾器");
   }

   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
           throws IOException, ServletException {
       HttpServletRequest req = (HttpServletRequest) request;
   String requestURI = req.getRequestURI();
   LOG.info("過濾到的請求--->"+requestURI);
   chain.doFilter(request, response);

   }

   public void destroy() {
       LOG.info("destroy過濾器");
   }
}
監聽器也是servlet 規范

servletContextListener 監聽

package com.soft.m;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.stereotype.Component;

@Component
@WebListener("WebListener")
@ServletComponentScan("com.soft.m")
public class MyListener implements ServletContextListener {
   private static Logger LOG = LoggerFactory.getLogger(MyListener.class);
   public void contextInitialized(ServletContextEvent sce) {
       ;
       LOG.info("init:"+sce.getSource().getClass().toString());
   }
       public void contextDestroyed(ServletContextEvent sce) {
           // TODO Auto-generated method stub
       LOG.info("contextDestroyed");

       }

}
session監聽器

package com.soft.m;

import javax.servlet.annotation.WebListener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@WebListener
public class MySessionListener implements HttpSessionListener {
private static Logger LOG = LoggerFactory.getLogger(MySessionListener.class);

public void sessionCreated(HttpSessionEvent se) {
LOG.info("sessionCreated："+se.getSession().getId());

}

public void sessionDestroyed(HttpSessionEvent se) {
LOG.info("sessionDestroyed："+se.getSession().getId());

}

}
servlet攔截器

package com.soft.m;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor implements HandlerInterceptor {
private static Logger logger = LoggerFactory.getLogger(MyFilter.class);
   public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
           throws Exception {
       HandlerMethod m=(HandlerMethod)handler;

       logger.info("preHandle:"+ m.getBeanType().toString());
return true;
   }

   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
           ModelAndView modelAndView) throws Exception {
       // TODO Auto-generated method stub
       logger.info("postHandle");

    }

   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
           throws Exception {
       logger.info("afterCompletion");

}

}
攔截起配置

package com.soft.m;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MyWebMvcConfigurerAdapter implements WebMvcConfigurer {

   public void addInterceptors(InterceptorRegistry registry) {
       // TODO Auto-generated method stub
registry.addInterceptor(new MyInterceptor()).addPathPatterns("/*");
   }

   public void addResourceHandlers(ResourceHandlerRegistry registry) {
       //registry.addResourceHandler("/*.ico");

   }

}
springboot 啟動的類

package com.soft.m;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MApplication {
   public static void main(String[] args) {
   SpringApplication.run(MApplication.class, args);
   }
}
controler 類例子

package com.soft.m;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@ResponseBody
public class HelloController {
   @RequestMapping("/hello")
public String hello(){
return "HelloController中的hello方法";
}
   @RequestMapping("/create")
public String create(HttpServletRequest request){
       request.getSession().setAttribute("aaa", "234");
return "HelloController中的create方法";
}
   @RequestMapping("/destory")
public String destory(HttpServletRequest request){
       request.getSession().invalidate();
return "HelloController中的destory方法";
}

}

看完上述內容，你們掌握springboot過濾器和攔截器以及監聽器的代碼怎么寫的方法了嗎？如果還想學到更多技能或想了解更多相關內容，歡迎關注創新互聯行業資訊頻道，感謝各位的閱讀！

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springboot過濾器和攔截器以及監聽器的代碼怎么寫