diff --git a/hutool-core/src/main/java/cn/hutool/core/text/StrUtil.java b/hutool-core/src/main/java/cn/hutool/core/text/StrUtil.java
index b3e63f3da..a86ff17b0 100644
--- a/hutool-core/src/main/java/cn/hutool/core/text/StrUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/text/StrUtil.java
@@ -7,6 +7,7 @@ import java.io.StringReader;
 import java.io.StringWriter;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import java.util.Collection;
 import java.util.Map;
 
 /**
@@ -415,4 +416,22 @@ public class StrUtil extends CharSequenceUtil implements StrPool {
 	public static String format(final CharSequence template, final Map<?, ?> map, final boolean ignoreNull) {
 		return StrFormatter.format(template, map, ignoreNull);
 	}
+
+	/**
+	 * @see CharSequenceUtil#isAllBlank(CharSequence...)
+	 * @param strs 字符串列表
+	 * @return 批量判断字符串是否全部为空白
+	 * @since 6.0.1
+	 */
+	public static boolean isAllBlank(final Collection<? extends CharSequence> strs) {
+		if (ArrayUtil.isEmpty(strs)) {
+			return true;
+		}
+		for (final CharSequence str : strs) {
+			if (isNotBlank(str)) {
+				return false;
+			}
+		}
+		return true;
+	}
 }
diff --git a/hutool-core/src/test/java/cn/hutool/core/text/StrUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/text/StrUtilTest.java
new file mode 100644
index 000000000..c3b8f1e6e
--- /dev/null
+++ b/hutool-core/src/test/java/cn/hutool/core/text/StrUtilTest.java
@@ -0,0 +1,91 @@
+package cn.hutool.core.text;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class StrUtilTest {
+	@Test
+	public void testReplace2() {
+		// https://gitee.com/dromara/hutool/issues/I4M16G
+		final String replace = "#{A}";
+		final String result = StrUtil.replace(replace, "#{AAAAAAA}", "1");
+		Assert.assertEquals(replace, result);
+	}
+
+	@Test
+	public void testReplaceByStr() {
+		final String replace = "SSM15930297701BeryAllen";
+		final String result = StrUtil.replace(replace, 5, 12, "***");
+		Assert.assertEquals("SSM15***01BeryAllen", result);
+	}
+
+	@Test
+	public void testAddPrefixIfNot() {
+		final String str = "hutool";
+		String result = StrUtil.addPrefixIfNot(str, "hu");
+		Assert.assertEquals(str, result);
+
+		result = StrUtil.addPrefixIfNot(str, "Good");
+		Assert.assertEquals("Good" + str, result);
+	}
+
+	@Test
+	public void testAddSuffixIfNot() {
+		final String str = "hutool";
+		String result = StrUtil.addSuffixIfNot(str, "tool");
+		Assert.assertEquals(str, result);
+
+		result = StrUtil.addSuffixIfNot(str, " is Good");
+		Assert.assertEquals(str + " is Good", result);
+
+		result = StrUtil.addSuffixIfNot("", "/");
+		Assert.assertEquals("/", result);
+	}
+
+	@Test
+	public void testIssAllBlank() {
+		List<String> queue = new LinkedList<>();
+		queue.add("apple");
+		queue.add("banana");
+		queue.add("cherry");
+		queue.add("orange");
+		queue.add("strawberry");
+		queue.add("watermelon");
+		Assert.assertFalse(StrUtil.isAllBlank(queue));
+
+		Assert.assertTrue(CharSequenceUtil.isAllBlank(""));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank(" "));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\t"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\n"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\r"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\f"));
+		Assert.assertFalse(CharSequenceUtil.isAllBlank("\b"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u00A0"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\uFEFF"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2000"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2001"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2002"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2003"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2004"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2005"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2006"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2007"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2008"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2009"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u200A"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u3000"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\uFEFF"));
+
+		// 其他空白字符
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u000B"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u000C"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u00A0"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u1680"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u180E"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2000"));
+		Assert.assertTrue(CharSequenceUtil.isAllBlank("\u2001"));
+	}
+}