import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import org.springframework.web.servlet.HandlerInterceptor; 
import org.springframework.web.servlet.ModelAndView; 
 
public class TestInterceptor implements HandlerInterceptor { 
 
  /** 
   * 返回值说明是否需要将当前的请求拦截下来 
   * false：请求将被终止 
   * true：请求会被继续运行 
   * Object handler 表示的是被拦截的请求的目标对象 
   */ 
  @Override 
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) 
      throws Exception { 
    System.out.println("TestInterceptor.preHandle()"); 
    return true; 
  } 
  /** 
   * modelAndView： 
   *   可以通过modelAndView参数改变显示的视图，或者修改发往视图的方法 
   */ 
  @Override 
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, 
      ModelAndView modelAndView) throws Exception { 
    System.out.println("TestInterceptor.postHandle()"); 
     
  } 
  /** 
   * 在视图加载完毕之后调用 
   * 常用于作于资源的销毁，流等 
   * 类似于析构函数 
   */ 
  @Override 
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) 
      throws Exception { 
    System.out.println("TestInterceptor.afterCompletion()");   
  } 
} 

<!-- 注册拦截器 --> 
 <mvc:interceptors> 
  <!-- 单个拦截器:设置具体的拦截路径 --> 
  <mvc:interceptor> 
    <mvc:mapping path="/courses/view2/*"/> 
    <bean class="com.cc.mvcdemo.interceptor.TestInterceptor"></bean> 
  </mvc:interceptor> 
   
  <!-- 第二种方式：拦截经过当前Dispatcherservlet的所有请求 --> 
  <bean class="com.cc.mvcdemo.interceptor.TestInterceptorTwo"></bean> 
   
 </mvc:interceptors>