SpringBoot2.0拦截器 与 1.X版本拦截器 的实现

1.5  版本 

先写个拦截器，跟xml配置方式一样，然后将拦截器加入spring容器管理 。接着创建 配置文件类 继承 WebMvcConfigurerAdapter 类，重写父类方法addInterceptors

　　　　

@Component
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
       //true放行  false拦截
        System.out.println("拦截");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        System.out.println("preHandle()执行过后再执行");
        System.out.println("controller执行前再执行");
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        System.out.println("controller执行过后再执行");
    }
}

拦截器类