feat:增加上传文件类型判断

src/components/drawers/AddLevelImportStu.vue

@@ -196,6 +196,18 @@ export default {
     //上传文件
     const handleChange = (info) => {
       console.log("info", info);
+
+      if(info){
+        var FileExt = info.file.name.replace(/.+\./, ""); 
+        if (['xls','xlsx'].indexOf(FileExt.toLowerCase()) === -1){  
+          state.fileList = [];
+          state.uploadpercent = -1;          
+          message.destroy()
+          message.error("请上传正确的文件格式")
+          return     
+        }
+      }
+
       state.addLoading = true;
       state.uploadErr = false;
       state.uploadpercent = parseInt(info.file.percent);