SpringBoot定义过滤器、监听器、拦截器的方法

package com.example.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; /**  * 实现javax.servlet.Filter,覆盖其三个方法  * @author Administrator  *  */ @WebFilter(filterName="customFilter",urlPatterns="/*") public class CustomFilter implements Filter{    @Override   public void destroy() {     System.out.println("CustomFilter过滤器销毁");        }    @Override   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)       throws IOException, ServletException {     System.out.println("CustomFilter指定过滤器操作......");     //执行操作后必须doFilter     chain.doFilter(request, response);   }    @Override   public void init(FilterConfig arg0) throws ServletException {     System.out.println("CustomFilter初始化......");   }     } 

package com.example.listener;  import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; import javax.servlet.annotation.WebListener;  /**  * 实现ServletContextListener，覆盖其两个方法  * @author Administrator  *  */ @WebListener public class CustomListener implements ServletContextListener{    @Override   public void contextDestroyed(ServletContextEvent servletContext) {     System.out.println("servletContext销毁......");        }    @Override   public void contextInitialized(ServletContextEvent servletContext) {     System.out.println("servletContext初始化......");   }  } 

package com.example.listener;  import javax.servlet.annotation.WebListener; import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener;  /**  * 实现HttpSessionListener接口，监视session的动态  * @author Administrator  *  */ @WebListener public class SessionListener implements HttpSessionListener{    @Override   public void sessionCreated(HttpSessionEvent session) {     System.out.println("session创建成功......");        }    @Override   public void sessionDestroyed(HttpSessionEvent session) {     System.out.println("session销毁......");        }  } 

package com.example.Interceptor;  import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;  public class CustomInterceptor implements HandlerInterceptor {    @Override   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object object,       Exception exception) throws Exception {     //在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）     System.out.println("3. 整个请求结束之后被调用......CustomInterceptor1......");   }    @Override   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView view)       throws Exception {     // 请求处理之后进行调用，但是在视图被渲染之前     System.out.println("2. 请求处理之后进行调用，但是在视图被渲染之前......CustomInterceptor1......");   }    @Override   public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception {     // 在请求处理之前进行调用     System.out.println("1. 在请求处理之前进行调用......CustomInterceptor1......");     // 只有返回true才会继续向下执行，返回false取消当前请求     return true;   }  } 

package com.example.Interceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;  public class CustomInterceptor2 implements HandlerInterceptor {    @Override   public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object object,       Exception exception) throws Exception {     //在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）     System.out.println("3. 整个请求结束之后被调用......CustomInterceptor2......");   }    @Override   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView view)       throws Exception {     // 请求处理之后进行调用，但是在视图被渲染之前     System.out.println("2. 请求处理之后进行调用，但是在视图被渲染之前......CustomInterceptor2......");   }    @Override   public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception {     // 在请求处理之前进行调用     System.out.println("1. 在请求处理之前进行调用......CustomInterceptor2......");     // 只有返回true才会继续向下执行，返回false取消当前请求     return true;   }  } 

package com.example.adapter;  import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;  import com.example.Interceptor.CustomInterceptor; import com.example.Interceptor.CustomInterceptor2;  /**  * 继承WebMvcConfigurerAdapter，复写addInterceptors方法  * @author Administrator  *  */ @Configuration public class WebAdapter extends WebMvcConfigurerAdapter{    @Override   public void addInterceptors(InterceptorRegistry registry) {     //众多的拦截器组成了一个拦截器链     /**      * 主要方法说明：      * addPathPatterns 用于添加拦截规则      * excludePathPatterns 用户排除拦截      */     registry.addInterceptor(new CustomInterceptor()).addPathPatterns("/*");     registry.addInterceptor(new CustomInterceptor2()).addPathPatterns("/*");     super.addInterceptors(registry);   } }