From 1da3acca6792dc5744117bbce3fa7a5bbca0e54f Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Thu, 25 Dec 2025 23:36:38 +0800
Subject: [PATCH] =?UTF-8?q?`HexUtil.isHexNumber`=E5=A2=9E=E5=8A=A0?=
 =?UTF-8?q?=E7=A9=BA=E6=A3=80=E6=9F=A5=EF=BC=88pr#1420@Gitee=EF=BC=89?=
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---
 .../hutool/v7/core/codec/binary/HexUtil.java  |  3 +++
 .../cn/hutool/v7/core/util/HexUtilTest.java   | 20 ++++++++++++-------
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/hutool-core/src/main/java/cn/hutool/v7/core/codec/binary/HexUtil.java b/hutool-core/src/main/java/cn/hutool/v7/core/codec/binary/HexUtil.java
index 17ca6fc949..e7cb49a990 100644
--- a/hutool-core/src/main/java/cn/hutool/v7/core/codec/binary/HexUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/v7/core/codec/binary/HexUtil.java
@@ -96,6 +96,9 @@ public class HexUtil extends Hex {
 	 * @return 是否为16进制
 	 */
 	public static boolean isHexNumber(final String value) {
+		if (StrUtil.isEmpty(value)) {
+			return false;
+		}
 		if (StrUtil.startWith(value, '-')) {
 			// issue#2875
 			return false;
diff --git a/hutool-core/src/test/java/cn/hutool/v7/core/util/HexUtilTest.java b/hutool-core/src/test/java/cn/hutool/v7/core/util/HexUtilTest.java
index 82a73eb4ca..4864cc25a8 100644
--- a/hutool-core/src/test/java/cn/hutool/v7/core/util/HexUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/v7/core/util/HexUtilTest.java
@@ -23,7 +23,7 @@ import org.junit.jupiter.api.Test;
 import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
 
 /**
  * HexUtil单元测试
@@ -59,23 +59,29 @@ public class HexUtilTest {
 
 	@Test
 	public void isHexNumberTest() {
-		Assertions.assertTrue(HexUtil.isHexNumber("0"));
-		Assertions.assertTrue(HexUtil.isHexNumber("002c"));
+		assertTrue(HexUtil.isHexNumber("0"));
+		assertTrue(HexUtil.isHexNumber("002c"));
 
 		String a = "0x3544534F444";
-		Assertions.assertTrue(HexUtil.isHexNumber(a));
+		assertTrue(HexUtil.isHexNumber(a));
 
 		// https://gitee.com/chinabugotech/hutool/issues/I62H7K
 		a = "0x0000000000000001158e460913d00000";
-		Assertions.assertTrue(HexUtil.isHexNumber(a));
+		assertTrue(HexUtil.isHexNumber(a));
 
 		// 错误的
 		a = "0x0000001000T00001158e460913d00000";
-		Assertions.assertFalse(HexUtil.isHexNumber(a));
+		assertFalse(HexUtil.isHexNumber(a));
 
 		// 错误的,https://github.com/chinabugotech/hutool/issues/2857
 		a = "-1";
-		Assertions.assertFalse(HexUtil.isHexNumber(a));
+		assertFalse(HexUtil.isHexNumber(a));
+	}
+
+	@Test
+	public void isHexNumberTestForEmpty() {
+		assertFalse(HexUtil.isHexNumber(""));
+		assertFalse(HexUtil.isHexNumber(null));
 	}
 
 	@Test