springmvc拦截器配置

实现 HandlerInterceptor 接口

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse
            response, Object handler) throws Exception {
        System.out.println("目标Handler执行前执行MyInterceptor01 --> preHandle方 法...");
/**
 * 返回 true：执行handler方法
 * 返回 false：阻止目标handler方法执行
 */
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse
            response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("目标Handler执行后，视图生成前执行MyInterceptor01 --> postHandle方法...");
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse
            response, Object handler, Exception ex) throws Exception {
        System.out.println("目标Handler执行后，视图生成后执行MyInterceptor01 --> afterCompletion方法...");
    }


}

拦截器xml配置

测试

    @RequestMapping("/hello")
    public ModelAndView hello(){
        System.out.println("方法执行前就执行这个方法");
        ModelAndView mv=new ModelAndView();
        mv.addObject("hello", "hello spring mvc");
        mv.setViewName("hello");
        return mv;
    }

第二种方法配置

*继承 HandlerInterceptorAdapter

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("目标Handler执行前执行MyInterceptor02 --> preHandle方 法...");
        return true;
    }
}

xml配置改正当前的类路径

如果想跳过 过滤器的话
xml配置

多个拦截器实现