fix：学生端登录必须录入出生年月

龚焕茏

2024-07-12 46b5c138b7b35f1ea0232cc19a9ec49a9229b15c

 src/main/java/com/mindskip/xzs/utility/excel/ExcelUtils.java

@@ -875,6 +875,12 @@
            cell.setCellValue("");
            return CELL_OTHER;
        }
        // 数据为""时
        if ("".equals(o)) {
            cell.setCellType(CellType.STRING);
            cell.setCellValue("");
            return CELL_OTHER;
        }
        // 是否为字符串
        if (o instanceof String) {
            String s = o.toString();