/** * 拦截器，实现HandlerInterceptor接口 * 只拦截控制器，不拦截jsp * @author Administrator * */public class MyHeaderInterceptor implements HandlerInterceptor{    //preHandle在Controller之前执行    @Override    public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {        System.out.println("Interceptor:preHandle");        return true;    }    //postHandle在控制器之后，jsp之前执行    @Override    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)            throws Exception {        System.out.println("Interceptor:postHandle");    }    //afterCompletion最后一定会执行，    @Override    public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)            throws Exception {        System.out.println("Interceptor:afterCompletion");    }}

SpringMVC.xml