实现SpringBoot自定义拦截器

个人是这么理解的，类似laravel

中间件的作用，可以前置可以后置。

@Configuration

public class MyAdapter extends WebMvcConfigurerAdapter{

 @Override

 public void addInterceptors(InterceptorRegistry registry){

 //添加拦截器

 registry.addInterceptor(new MyInterceptor())

          .addPathPatterns("/**").excludePathPatterns("/toLogin","/login");

 super.addInterceptors(registry);

 }

}

粗体斜体较为重要，super表示重写父类的方法。  具体的方法在new MyInterceptor()这个类实现。

public class MyInterceptor implements HandlerInterceptor {

@Override

public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {

    return true;

}

@Override

public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    //方法体

}

@Override

public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    //方法体

}

}