From 73c77aaecee6b367f8f5080fdd245c80c8e00265 Mon Sep 17 00:00:00 2001
From: lpj <971567977@qq.com>
Date: Mon, 1 Sep 2025 18:52:44 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=A3=E5=86=B3#4051=E6=8F=90=E5=87=BA?=
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---
 .../java/cn/hutool/core/util/NumberUtil.java  | 20 +++++++++++++++++--
 .../cn/hutool/core/util/NumberUtilTest.java   |  8 ++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
index 476535ba3..f5cbe0256 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
@@ -2549,7 +2549,7 @@ public class NumberUtil {
 
 	/**
 	 * 提供精确的幂运算<br>
-	 * 如果n为负数，则返回1/a的-n次方，默认四舍五入
+	 * 如果n为负数，则返回1/a的-n次方，默认四舍五入，保留两位小数
 	 *
 	 * @param number 底数
 	 * @param n      指数，如果为负数，则返回1/a的-n次方
@@ -2557,9 +2557,25 @@ public class NumberUtil {
 	 * @since 4.1.0
 	 */
 	public static BigDecimal pow(BigDecimal number, int n) {
+		return pow(number, n, 2, RoundingMode.HALF_UP);
+	}
+
+
+	/**
+	 * 提供精确的幂运算<br>
+	 * 如果n为负数，则返回1/a的-n次方，默认四舍五入
+	 *
+	 * @param number       底数
+	 * @param n            指数，如果为负数，则返回1/a的-n次方
+	 * @param scale        保留的小数位 (指数为负数时生效)
+	 * @param roundingMode 保留小数的模式 {@link RoundingMode} (指数为负数时生效)
+	 * @return 幂的积
+	 * @since 4.1.0
+	 */
+	public static BigDecimal pow(BigDecimal number, int n, int scale, RoundingMode roundingMode) {
 		if (n < 0) {
 			// a的n次方，如果n为负数，则返回1/a的-n次方
-			return BigDecimal.ONE.divide(pow(number, -n), 2, RoundingMode.HALF_UP);
+			return BigDecimal.ONE.divide(pow(number, -n), scale, roundingMode);
 		}
 		return number.pow(n);
 	}
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
index 145ad5bb6..528da7adf 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
@@ -660,6 +660,14 @@ public class NumberUtilTest {
 		assertEquals(expected, NumberUtil.pow(number, exponent));
 	}
 
+	@Test
+	public void testPowSmallNumberScale() {
+		BigDecimal number = new BigDecimal("1.2");
+		int exponent = -3;
+		BigDecimal expected = new BigDecimal("0.58");
+		assertEquals(expected, NumberUtil.pow(number, exponent));
+	}
+
 	@Test
 	public void issue3636Test() {
 		final Number number = NumberUtil.parseNumber("12,234,456");