import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;public class FirstInterceptor implements HandlerInterceptor{    /**     * 该方法在目标方法之前被调用.     * 若返回值为 true, 则继续调用后续的拦截器和目标方法.      * 若返回值为 false, 则不会再调用后续的拦截器和目标方法.      *      * 可以考虑做权限. 日志, 事务等.      */    @Override    public boolean preHandle(HttpServletRequest request,            HttpServletResponse response, Object handler) throws Exception {        System.out.println("[FirstInterceptor] preHandle");        return true;    }    /**     * 调用目标方法之后, 但渲染视图之前.      * 可以对请求域中的属性或视图做出修改.      */    @Override    public void postHandle(HttpServletRequest request,            HttpServletResponse response, Object handler,            ModelAndView modelAndView) throws Exception {        System.out.println("[FirstInterceptor] postHandle");    }    /**     * 渲染视图之后被调用. 释放资源     */    @Override    public void afterCompletion(HttpServletRequest request,            HttpServletResponse response, Object handler, Exception ex)            throws Exception {        System.out.println("[FirstInterceptor] afterCompletion");    }}preHandle按顺序的正序执行postHandle、afterCompletion按顺序的反序执行

一个拦截器顺序

 

多个拦截器顺序

 

第二个拦截器返回false