diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/util/RandomUtil.java b/hutool-core/src/main/java/org/dromara/hutool/core/util/RandomUtil.java
index 552a3cc38..979e4ef94 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/util/RandomUtil.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/util/RandomUtil.java
@@ -636,7 +636,7 @@ public class RandomUtil {
 	 * @return 随机字符串
 	 */
 	public static String randomString(final int length) {
-		return randomStringLower(BASE_CHAR_NUMBER, length);
+		return randomString(BASE_CHAR_NUMBER, length);
 	}
 
 	/**
@@ -646,7 +646,7 @@ public class RandomUtil {
 	 * @return 随机字符串
 	 */
 	public static String randomStringLower(final int length) {
-		return randomStringLower(BASE_CHAR_NUMBER_LOWER, length);
+		return randomString(BASE_CHAR_NUMBER_LOWER, length);
 	}
 
 	/**
@@ -657,7 +657,7 @@ public class RandomUtil {
 	 * @since 4.0.13
 	 */
 	public static String randomStringUpper(final int length) {
-		return randomStringLower(BASE_CHAR_NUMBER_LOWER, length).toUpperCase();
+		return randomString(BASE_CHAR_NUMBER_LOWER, length).toUpperCase();
 	}
 
 	/**
@@ -670,7 +670,7 @@ public class RandomUtil {
 	public static String randomStringWithoutStr(final int length, final String elemData) {
 		String baseStr = BASE_CHAR_NUMBER_LOWER;
 		baseStr = StrUtil.removeAll(baseStr, elemData.toLowerCase().toCharArray());
-		return randomStringLower(baseStr, length);
+		return randomString(baseStr, length);
 	}
 
 	/**
@@ -680,7 +680,7 @@ public class RandomUtil {
 	 * @return 随机字符串
 	 */
 	public static String randomNumbers(final int length) {
-		return randomStringLower(BASE_NUMBER, length);
+		return randomString(BASE_NUMBER, length);
 	}
 
 	/**
@@ -690,7 +690,7 @@ public class RandomUtil {
 	 * @param length     字符串的长度
 	 * @return 随机字符串
 	 */
-	public static String randomStringLower(final String baseString, int length) {
+	public static String randomString(final String baseString, int length) {
 		if (StrUtil.isEmpty(baseString)) {
 			return StrUtil.EMPTY;
 		}
diff --git a/hutool-core/src/test/java/org/dromara/hutool/core/util/RandomUtilTest.java b/hutool-core/src/test/java/org/dromara/hutool/core/util/RandomUtilTest.java
index 6f26c3785..a8b5a32c5 100644
--- a/hutool-core/src/test/java/org/dromara/hutool/core/util/RandomUtilTest.java
+++ b/hutool-core/src/test/java/org/dromara/hutool/core/util/RandomUtilTest.java
@@ -89,7 +89,7 @@ public class RandomUtilTest {
 
 	@Test
 	public void randomStringOfLengthTest(){
-		final String s = RandomUtil.randomStringLower("123", -1);
+		final String s = RandomUtil.randomString("123", -1);
 		Assertions.assertNotNull(s);
 	}
 
diff --git a/hutool-crypto/src/test/java/org/dromara/hutool/crypto/asymmetric/RSATest.java b/hutool-crypto/src/test/java/org/dromara/hutool/crypto/asymmetric/RSATest.java
index f7e84b733..02fcb8bd7 100644
--- a/hutool-crypto/src/test/java/org/dromara/hutool/crypto/asymmetric/RSATest.java
+++ b/hutool-crypto/src/test/java/org/dromara/hutool/crypto/asymmetric/RSATest.java
@@ -205,7 +205,7 @@ public class RSATest {
 		final byte[] keyBytes = Base64.decode(publicKeyStr);
 		final PublicKey publicKey = KeyUtil.generateRSAPublicKey(keyBytes);
 
-		final byte[] data = RandomUtil.randomStringLower("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", 16).getBytes();
+		final byte[] data = RandomUtil.randomString("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", 16).getBytes();
 		//长度不满足128补0
 		final byte[] finalData = ArrayUtil.resize(data, 128);
 
diff --git a/hutool-crypto/src/test/java/org/dromara/hutool/crypto/symmetric/fpe/FPETest.java b/hutool-crypto/src/test/java/org/dromara/hutool/crypto/symmetric/fpe/FPETest.java
index 4b08a0cff..6587234fa 100644
--- a/hutool-crypto/src/test/java/org/dromara/hutool/crypto/symmetric/fpe/FPETest.java
+++ b/hutool-crypto/src/test/java/org/dromara/hutool/crypto/symmetric/fpe/FPETest.java
@@ -30,7 +30,7 @@ public class FPETest {
 		final FPE fpe = new FPE(FPE.FPEMode.FF1, keyBytes, numberMapper, null);
 
 		// 原始数据
-		final String phone = RandomUtil.randomStringLower("A0123456789", 13);
+		final String phone = RandomUtil.randomString("A0123456789", 13);
 		final String encrypt = fpe.encrypt(phone);
 		// 加密后与原密文长度一致
 		Assertions.assertEquals(phone.length(), encrypt.length());
@@ -49,7 +49,7 @@ public class FPETest {
 		final FPE fpe = new FPE(FPE.FPEMode.FF3_1, keyBytes, numberMapper, null);
 
 		// 原始数据
-		final String phone = RandomUtil.randomStringLower("A0123456789", 13);
+		final String phone = RandomUtil.randomString("A0123456789", 13);
 		final String encrypt = fpe.encrypt(phone);
 		// 加密后与原密文长度一致
 		Assertions.assertEquals(phone.length(), encrypt.length());
diff --git a/hutool-swing/src/main/java/org/dromara/hutool/swing/captcha/generator/RandomGenerator.java b/hutool-swing/src/main/java/org/dromara/hutool/swing/captcha/generator/RandomGenerator.java
index e17b8ba5c..5fbf73b24 100644
--- a/hutool-swing/src/main/java/org/dromara/hutool/swing/captcha/generator/RandomGenerator.java
+++ b/hutool-swing/src/main/java/org/dromara/hutool/swing/captcha/generator/RandomGenerator.java
@@ -46,7 +46,7 @@ public class RandomGenerator extends AbstractGenerator {
 
 	@Override
 	public String generate() {
-		return RandomUtil.randomStringLower(this.baseStr, this.length);
+		return RandomUtil.randomString(this.baseStr, this.length);
 	}
 
 	@Override