SpringBoot ~ 拦截器

拦截器

1. 创建拦截器

   /** * @author wsyjlly * @create 2019.06.13 - 16:52 **/public class FileUploadInterceptor implements HandlerInterceptor {    private Logger logger = LoggerFactory.getLogger(getClass());    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,   handler) throws Exception {        logger.debug("FileUploadInterceptor...preHandle");        return true;    }    @Override    public void postHandle(HttpServletRequest request, HttpServletResponse response,   handler, ModelAndView modelAndView) throws Exception {        logger.debug("FileUploadInterceptor...postHandle");    }    @Override    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,   handler, Exception ex) throws Exception {        logger.debug("FileUploadInterceptor...afterCompletion");    }}

2. 注册拦截器

   1. 注册方式一：一般注册方式

      /** * @author wsyjlly * @create 2019.06.12 - 16:17 **/@Configurationpublic class WebMvcConfig implements WebMvcConfigurer {    /*    * 配置拦截器    * */    @Override    public void addInterceptors(InterceptorRegistry registry) {          registry.addInterceptor(new FileUploadInterceptor()).          addPathPatterns("/upload").order(1);    }}

   2. 注册方式二：当拦截器中需要注入变量时须提前加载该拦截器

      /** * @author wsyjlly * @create 2019.06.12 - 16:17 **/@Configurationpublic class WebMvcConfig implements WebMvcConfigurer {    /*    * 配置拦截器    * */    @Override    public void addInterceptors(InterceptorRegistry registry) {          registry.addInterceptor(getFileUploadInterceptor()).          addPathPatterns("/upload").order(1);    }        @Bean    public FileUploadInterceptor getFileUploadInterceptor(){        return new FileUploadInterceptor();    }}