在线文档上传附件优化

src/components/uploadOnlineOffice.vue

@@ -102,7 +102,7 @@ export default {
             let query = new FormData();
             query.append("file", file);
             console.log(query);
-            let docType = file.name.split('.')[1]
+            let docType = file.name.split('.')[file.name.split('.').length-1]
             const extension1 = docType === "xlsx";
             const extension2 = docType === "xls";
             const extension3 = docType === "docx";