修改数字判断

src/Tools/ExcelImporter.php

@@ -141,11 +141,15 @@ class ExcelImporter
     public function checkNumeric($data, &$errorCount)
     {
         foreach ($data as $k => $v) {
+            if (!$v || $v === '') {
+                continue;
+            } else {
                 if (!is_numeric($v)) {
                     $this->setErrorMessage("{$k}只能是数字", $errorCount);
                     return false;
                 }
             }
+        }
         return true;
     }