解决null异常

pcloud-service-book/src/main/java/com/pcloud/book/reading/check/ParamCheck.java

@@ -165,7 +165,7 @@ public class ParamCheck {
             String hex = clockLink.replaceAll(UrlConstant.OWN_SHORT_URL, "");
             String originLink = UrlUtils.getUrl4Own(hex);
             //编辑端自定义打卡
-            if (!originLink.contains("clock")) {
+            if (StringUtil.isEmpty(originLink) || !originLink.contains("clock")) {
                 throw new BookBizException(BookBizException.PARAM_IS_NULL, "请填写正确的打卡链接");
             }
             // 拿到打卡的主键id