springboot过滤器和拦截器以及监听器的代码怎么写

org.springframework.boot
spring-boot-starter-web

org.springframework.boot
spring-boot-maven-plugin
过滤器，使用的servlet3 规范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(“初始化过滤器”);
} public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
String requestURI = req.getRequestURI();
LOG.info(“过滤到的请求—>”+requestURI);
chain.doFilter(request, response);

} public void destroy() {
LOG.info(“destroy过滤器”);
}
}
监听器 也是servlet 规范servletContextListener 监听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监听器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 香港云主机.info(“sessionCreated：”+se.getSession().getId()); } public void sessionDestroyed(HttpSessionEvent se) {
LOG.info(“sessionDestroyed：”+se.getSession().getId()); }}
servlet拦截器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”); }}
拦截起配置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 启动的类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 类例子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”;
}}
看完上述内容，你们掌握springboot过滤器和拦截器以及监听器的代码怎么写的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注开发云行业资讯频道，感谢各位的阅读！

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