diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0122c7cb1..78e647787 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 * 【extra  】      修复CompressUtil工具多出\问题（issue#I71K5V@Gitee）
 * 【db     】      解决oracle情况下setObject(inputStream)报错问题，java.sql.SQLException: 无效的列类型问题（pr#1207@Gitee）
 * 【core   】      解决CalendarUtil.isSameDay时区不同导致结果错误问题（pr#3548@Github）
+* 【core   】      修复RandomUtil.randomStringWithoutStr方法问题（pr#1209@Gitee）
 
 -------------------------------------------------------------------------------------------------------------
 # 5.8.27(2024-03-29)
diff --git a/hutool-core/src/main/java/cn/hutool/core/img/Img.java b/hutool-core/src/main/java/cn/hutool/core/img/Img.java
index ab9953bbf..6ed55f6b9 100755
--- a/hutool-core/src/main/java/cn/hutool/core/img/Img.java
+++ b/hutool-core/src/main/java/cn/hutool/core/img/Img.java
@@ -8,22 +8,11 @@ import cn.hutool.core.lang.Assert;
 import cn.hutool.core.util.NumberUtil;
 import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.StrUtil;
-import com.sun.imageio.plugins.common.ImageUtil;
 
 import javax.imageio.ImageIO;
 import javax.imageio.stream.ImageInputStream;
 import javax.imageio.stream.ImageOutputStream;
-import java.awt.AlphaComposite;
-import java.awt.BasicStroke;
-import java.awt.Color;
-import java.awt.Dimension;
-import java.awt.Font;
-import java.awt.Graphics2D;
-import java.awt.Image;
-import java.awt.Point;
-import java.awt.Rectangle;
-import java.awt.RenderingHints;
-import java.awt.Stroke;
+import java.awt.*;
 import java.awt.color.ColorSpace;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.Ellipse2D;
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
index 16b767df5..f96d77f22 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
@@ -599,15 +599,29 @@ public class RandomUtil {
 		return randomString(BASE_CHAR_NUMBER, length).toUpperCase();
 	}
 
+	/**
+	 * 获得一个随机的字符串（只包含数字和字母） 并排除指定字符串
+	 *
+	 * @param length   字符串的长度
+	 * @param elemData 要排除的字符串,如：去重容易混淆的字符串，oO0、lL1、q9Q、pP，区分大小写
+	 * @return 随机字符串
+	 */
+	public static String randomStringWithoutStr(final int length, final String elemData) {
+		String baseStr = BASE_CHAR_NUMBER;
+		baseStr = StrUtil.removeAll(baseStr, elemData.toCharArray());
+		return randomString(baseStr, length);
+	}
+
 	/**
 	 * 获得一个随机的字符串（只包含数字和小写字母） 并排除指定字符串
 	 *
 	 * @param length   字符串的长度
 	 * @param elemData 要排除的字符串,如：去重容易混淆的字符串，oO0、lL1、q9Q、pP，不区分大小写
 	 * @return 随机字符串
+	 * @since 5.8.28
 	 */
-	public static String randomStringWithoutStr(final int length, final String elemData) {
-		String baseStr = BASE_CHAR_NUMBER;
+	public static String randomStringLowerWithoutStr(final int length, final String elemData) {
+		String baseStr = BASE_CHAR_NUMBER_LOWER;
 		baseStr = StrUtil.removeAll(baseStr, elemData.toLowerCase().toCharArray());
 		return randomString(baseStr, length);
 	}