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; 
/** 
 * 實(shí)現(xiàn)javax.servlet.Filter,覆蓋其三個(gè)方法 
 * @author Administrator 
 * 
 */ 
@WebFilter(filterName="customFilter",urlPatterns="/*") 
public class CustomFilter implements Filter{ 
 
  @Override 
  public void destroy() { 
    System.out.println("CustomFilter過(guò)濾器銷毀"); 
     
  } 
 
  @Override 
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 
      throws IOException, ServletException { 
    System.out.println("CustomFilter指定過(guò)濾器操作......"); 
    //執(zhí)行操作后必須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; 
 
/** 
 * 實(shí)現(xiàn)ServletContextListener，覆蓋其兩個(gè)方法 
 * @author Administrator 
 * 
 */ 
@WebListener 
public class CustomListener implements ServletContextListener{ 
 
  @Override 
  public void contextDestroyed(ServletContextEvent servletContext) { 
    System.out.println("servletContext銷毀......"); 
     
  } 
 
  @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; 
 
/** 
 * 實(shí)現(xiàn)HttpSessionListener接口，監(jiān)視session的動(dòng)態(tài) 
 * @author Administrator 
 * 
 */ 
@WebListener 
public class SessionListener implements HttpSessionListener{ 
 
  @Override 
  public void sessionCreated(HttpSessionEvent session) { 
    System.out.println("session創(chuàng)建成功......"); 
     
  } 
 
  @Override 
  public void sessionDestroyed(HttpSessionEvent session) { 
    System.out.println("session銷毀......"); 
     
  } 
 
} 

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 { 
    //在整個(gè)請(qǐng)求結(jié)束之后被調(diào)用，也就是在DispatcherServlet 渲染了對(duì)應(yīng)的視圖之后執(zhí)行（主要是用于進(jìn)行資源清理工作） 
    System.out.println("3. 整個(gè)請(qǐng)求結(jié)束之后被調(diào)用......CustomInterceptor1......"); 
  } 
 
  @Override 
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView view) 
      throws Exception { 
    // 請(qǐng)求處理之后進(jìn)行調(diào)用，但是在視圖被渲染之前 
    System.out.println("2. 請(qǐng)求處理之后進(jìn)行調(diào)用，但是在視圖被渲染之前......CustomInterceptor1......"); 
  } 
 
  @Override 
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception { 
    // 在請(qǐng)求處理之前進(jìn)行調(diào)用 
    System.out.println("1. 在請(qǐng)求處理之前進(jìn)行調(diào)用......CustomInterceptor1......"); 
    // 只有返回true才會(huì)繼續(xù)向下執(zhí)行，返回false取消當(dāng)前請(qǐng)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 { 
    //在整個(gè)請(qǐng)求結(jié)束之后被調(diào)用，也就是在DispatcherServlet 渲染了對(duì)應(yīng)的視圖之后執(zhí)行（主要是用于進(jìn)行資源清理工作） 
    System.out.println("3. 整個(gè)請(qǐng)求結(jié)束之后被調(diào)用......CustomInterceptor2......"); 
  } 
 
  @Override 
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView view) 
      throws Exception { 
    // 請(qǐng)求處理之后進(jìn)行調(diào)用，但是在視圖被渲染之前 
    System.out.println("2. 請(qǐng)求處理之后進(jìn)行調(diào)用，但是在視圖被渲染之前......CustomInterceptor2......"); 
  } 
 
  @Override 
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception { 
    // 在請(qǐng)求處理之前進(jìn)行調(diào)用 
    System.out.println("1. 在請(qǐng)求處理之前進(jìn)行調(diào)用......CustomInterceptor2......"); 
    // 只有返回true才會(huì)繼續(xù)向下執(zhí)行，返回false取消當(dāng)前請(qǐng)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; 
 
/** 
 * 繼承WebMvcConfigurerAdapter，復(fù)寫addInterceptors方法 
 * @author Administrator 
 * 
 */ 
@Configuration 
public class WebAdapter extends WebMvcConfigurerAdapter{ 
 
  @Override 
  public void addInterceptors(InterceptorRegistry registry) { 
    //眾多的攔截器組成了一個(gè)攔截器鏈 
    /** 
     * 主要方法說(shuō)明： 
     * addPathPatterns 用于添加攔截規(guī)則 
     * excludePathPatterns 用戶排除攔截 
     */ 
    registry.addInterceptor(new CustomInterceptor()).addPathPatterns("/*"); 
    registry.addInterceptor(new CustomInterceptor2()).addPathPatterns("/*"); 
    super.addInterceptors(registry); 
  } 
}