MVC自定义拦截器Intercepetor

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyIntercpetor implements HandlerInterceptor {
//请求执行方法之前执行
    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
        System.out.println("MyIntercpetor.preHandle()");
        return true;
    }
//执行方法之后执行
    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        System.out.println("MyIntercpetor.postHandle()");
        
    }
    //最终执行的方法
    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println("MyIntercpetor.afterCompletion()");
        
    }

}