From f9eb29fa87991cc0273afefeac697858e56c5096 Mon Sep 17 00:00:00 2001
From: Will <5499819+guizhonglin@user.noreply.gitee.com>
Date: Thu, 20 Nov 2025 10:34:06 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DValidator.isBetween=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=E5=9C=A8=E9=AB=98=E7=B2=BE=E5=BA=A6Number=E7=B1=BB?=
 =?UTF-8?q?=E5=9E=8B=E4=B8=8B=E5=AD=98=E5=9C=A8=E7=B2=BE=E5=BA=A6=E4=B8=A2?=
 =?UTF-8?q?=E5=A4=B1=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/cn/hutool/core/lang/Validator.java    |  8 ++++++--
 .../java/cn/hutool/core/lang/ValidatorTest.java     | 13 +++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/lang/Validator.java b/hutool-core/src/main/java/cn/hutool/core/lang/Validator.java
index 5551832fff..839f06547e 100755
--- a/hutool-core/src/main/java/cn/hutool/core/lang/Validator.java
+++ b/hutool-core/src/main/java/cn/hutool/core/lang/Validator.java
@@ -9,6 +9,7 @@ import cn.hutool.core.util.ReUtil;
 import cn.hutool.core.util.StrUtil;
 import cn.hutool.core.util.IdcardUtil;
 
+import java.math.BigDecimal;
 import java.net.MalformedURLException;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -1123,8 +1124,11 @@ public class Validator {
 		Assert.notNull(value);
 		Assert.notNull(min);
 		Assert.notNull(max);
-		final double doubleValue = value.doubleValue();
-		return (doubleValue >= min.doubleValue()) && (doubleValue <= max.doubleValue());
+		// 通过 NumberUtil 转换为 BigDecimal，使用 BigDecimal 进行比较以保留精度
+		BigDecimal valBd = NumberUtil.toBigDecimal(value);
+		BigDecimal minBd = NumberUtil.toBigDecimal(min);
+		BigDecimal maxBd = NumberUtil.toBigDecimal(max);
+		return valBd.compareTo(minBd) >= 0 && valBd.compareTo(maxBd) <= 0;
 	}
 
 	/**
diff --git a/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java b/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
index 40be8a6d11..c09cb77df5 100755
--- a/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
@@ -227,6 +227,19 @@ public class ValidatorTest {
 		assertTrue(Validator.isBetween(0.19, 0.1, 0.2));
 	}
 
+
+	@Test
+	public void isBetweenPrecisionLossTest() {
+		// 使用超过 double 精度的值
+		long base = 10000000000000000L;
+		long min = base + 1;
+		long max = base + 2;
+
+		// 在 double 转换下，base、min 和 max 是完全相等的，因为 double 精度不够
+		// 预期结果为false，但是因为double 精度不够，导致输出为true
+		assertFalse(Validator.isBetween(base, min, max));
+	}
+
 	@Test
 	public void isCarVinTest() {
 		assertTrue(Validator.isCarVin("LSJA24U62JG269225"));