8.SpringBoot拦截器

定义拦截器

public class MyInterceptor implements HandlerInterceptor {// 实现HandlerInterceptor接口
    protected static Logger logger = LoggerFactory.getLogger(HandlerInterceptor.class);
    /**
     * 访问控制器方法前执行
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        logger.info("{}--preHandle:{}", LocalDateTime.now(), request.getRequestURL());
        return true;
    }
    /**
     * 访问控制器方法后执行
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        logger.info("{}--postHandle:{}", LocalDateTime.now(), request.getRequestURL());
    }
    /**
     * postHandle方法执行完成后执行，一般用于释放资源
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        logger.info("{}--afterCompletion:{}", LocalDateTime.now(), request.getRequestURL());
    }
}

配置拦截器

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 对所有访问路径，都通过MyInterceptor类型的拦截器进行拦截
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
    }
}