Interceptor 拦截器

用于在程序执行过程中拦截或截取特定的操作或事件。它可以在操作发生之前、之后进行自定义的处理。

注册配置拦截器

@Slf4j
@Component
public class DemoInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("接口执行前执行");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("接口执行后执行");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        log.info("视图渲染后执行");
    }
}

拦截器路径配置

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
    //自定义的拦截器对象
    @Autowired
    private DemoInterceptor demoInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //添加拦截对象
        registry.addInterceptor(demoInterceptor)
                //添加拦截的接口
                .addPathPatterns("/demo/*")
                //添加不拦截的接口
                .excludePathPatterns("/demo/get");
    }
}