From 41141cd824476cf61d2d3058149c0337e0b32bbe Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Sat, 14 Jun 2025 19:02:25 +0800
Subject: [PATCH] gts

---
 CHANGELOG.md                                  |  1 +
 .../java/cn/hutool/core/util/ClassUtil.java   |  4 ++-
 .../cn/hutool/poi/excel/Issue3965Test.java    | 28 +++++++++++++++++++
 3 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 hutool-poi/src/test/java/cn/hutool/poi/excel/Issue3965Test.java

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3f79ebe0..788e44831 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@
 * 【core   】      修复`LunarFestival`中重复节日问题（issue#ICC8X3@Gitee）
 * 【core   】      修复`ThreadUtil`中中断异常处理丢失中断信息的问题，解决ConcurrencyTester资源未释放的问题（pr#1358@Gitee）
 * 【core   】      修复`TEL_400_800`正则规则太窄问题（issue#3967@Github）
+* 【core   】      修复`ClassUti`isNormalClass判断未排除String问题（issue#3965@Github）
 
 -------------------------------------------------------------------------------------------------------------
 # 5.8.38(2025-05-13)
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/ClassUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/ClassUtil.java
index 0d7479b5e..87e5c7913 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/ClassUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/ClassUtil.java
@@ -917,7 +917,9 @@ public class ClassUtil {
 				&& false == clazz.isArray() //
 				&& false == clazz.isAnnotation() //
 				&& false == clazz.isSynthetic() //
-				&& false == clazz.isPrimitive();//
+				&& false == clazz.isPrimitive()//
+ 				// issue#3965 String有isEmpty方法，但是不能被当作bean
+				&& clazz != String.class;//
 	}
 
 	/**
diff --git a/hutool-poi/src/test/java/cn/hutool/poi/excel/Issue3965Test.java b/hutool-poi/src/test/java/cn/hutool/poi/excel/Issue3965Test.java
new file mode 100644
index 000000000..8c8ed8bbe
--- /dev/null
+++ b/hutool-poi/src/test/java/cn/hutool/poi/excel/Issue3965Test.java
@@ -0,0 +1,28 @@
+package cn.hutool.poi.excel;
+
+import cn.hutool.core.collection.ListUtil;
+import cn.hutool.core.io.FileUtil;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Issue3965Test {
+	@Test
+	@Disabled
+	void writeTest() {
+		ArrayList<List<String>> arrayList = new ArrayList<>();
+
+		arrayList.add(ListUtil.of("a"));
+		arrayList.add(ListUtil.of("b"));
+		arrayList.add(ListUtil.of("c"));
+		arrayList.add(ListUtil.of("d"));
+
+		ExcelWriter writer = ExcelUtil.getWriter(FileUtil.file("d:/test/123.xlsx"));
+		writer.setColumnWidth(0, 50);
+		writer.write(arrayList);
+		writer.flush();
+		writer.close();
+	}
+}