From 16fc04d9551f1a04b309160e2f572034b40788d5 Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Mon, 26 Jun 2023 12:34:52 +0800
Subject: [PATCH] =?UTF-8?q?ExcelReader.getWriter=E9=80=BB=E8=BE=91?=
 =?UTF-8?q?=E5=8F=98=E6=9B=B4=EF=BC=8C=E5=BD=93=E4=BB=8E=E9=9D=9E=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6=E8=AF=BB=E5=8F=96=E6=97=B6=EF=BC=8C=E8=8E=B7=E5=8F=96?=
 =?UTF-8?q?sheet=EF=BC=8C=E8=80=8C=E9=9D=9E=E7=A9=BA=E8=A1=A8=E6=A0=BC?=
 =?UTF-8?q?=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../org/dromara/hutool/poi/excel/ExcelReader.java     | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/hutool-poi/src/main/java/org/dromara/hutool/poi/excel/ExcelReader.java b/hutool-poi/src/main/java/org/dromara/hutool/poi/excel/ExcelReader.java
index 106470458..b540b2b9b 100644
--- a/hutool-poi/src/main/java/org/dromara/hutool/poi/excel/ExcelReader.java
+++ b/hutool-poi/src/main/java/org/dromara/hutool/poi/excel/ExcelReader.java
@@ -428,13 +428,20 @@ public class ExcelReader extends ExcelBase<ExcelReader> {
 
 	/**
 	 * 获取Excel写出器<br>
-	 * 在读取Excel并做一定编辑后，获取写出器写出<br>
-	 * 注意，只读方式下，此方法无效
+	 * 在读取Excel并做一定编辑后，获取写出器写出，规则如下：
+	 * <ul>
+	 *     <li>1. 当从流中读取时，转换为Writer直接使用Sheet对象，此时修改不会影响源文件，Writer中flush需要指定新的路径。</li>
+	 *     <li>2. 当从文件读取时，直接获取文件及sheet名称，此时可以修改原文件。</li>
+	 * </ul>
 	 *
 	 * @return {@link ExcelWriter}
 	 * @since 4.0.6
 	 */
 	public ExcelWriter getWriter() {
+		if (null == this.destFile) {
+			// 非读取文件形式，直接获取sheet操作。
+			return new ExcelWriter(this.sheet);
+		}
 		return ExcelUtil.getWriter(this.destFile, this.sheet.getSheetName());
 	}