From 8007b22b8569dc8036df95adb58f6ca53c8eb04c Mon Sep 17 00:00:00 2001
From: RuoYi <yzz_ivy@163.com>
Date: Thu, 27 Jan 2022 12:04:40 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AF=BC=E5=87=BAExcel=E6=97=B6=E5=B1=8F?=
 =?UTF-8?q?=E8=94=BD=E5=85=AC=E5=BC=8F=EF=BC=8C=E9=98=B2=E6=AD=A2CSV?=
 =?UTF-8?q?=E6=B3=A8=E5=85=A5=E9=A3=8E=E9=99=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/ruoyi/common/utils/poi/ExcelUtil.java    | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
index 93a19e8..22b6b57 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
@@ -86,6 +86,9 @@ public class ExcelUtil<T>
 {
     private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);
 
+    public static final String[] FORMULA_STR = { "=", "-", "+", "@" };
+
+
     /**
      * Excel sheet最大行数，默认65536
      */
@@ -710,7 +713,13 @@ public class ExcelUtil<T>
     {
         if (ColumnType.STRING == attr.cellType())
         {
-            cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
+            String cellValue = Convert.toStr(value);
+            // 对于任何以表达式触发字符 =-+@开头的单元格，直接使用tab字符作为前缀，防止CSV注入。
+            if (StringUtils.containsAny(cellValue, FORMULA_STR))
+            {
+                cellValue = StringUtils.replaceEach(cellValue, FORMULA_STR, new String[] { "\t=", "\t-", "\t+", "\t@" });
+            }
+            cell.setCellValue(StringUtils.isNull(cellValue) ? attr.defaultValue() : cellValue + attr.suffix());
         }
         else if (ColumnType.NUMERIC == attr.cellType())
         {