diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/text/StrJoiner.java b/hutool-core/src/main/java/org/dromara/hutool/core/text/StrJoiner.java
index a686a5437..413742bcc 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/text/StrJoiner.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/text/StrJoiner.java
@@ -145,7 +145,7 @@ public class StrJoiner implements Appendable, Serializable {
 	/**
 	 * 设置分隔符
 	 *
-	 * @param delimiter 分隔符
+	 * @param delimiter 分隔符，{@code null}表示无连接符，直接拼接
 	 * @return this
 	 */
 	public StrJoiner setDelimiter(final CharSequence delimiter) {
@@ -422,7 +422,9 @@ public class StrJoiner implements Appendable, Serializable {
 	 */
 	private Appendable prepare() throws IOException {
 		if (hasContent) {
-			this.appendable.append(delimiter);
+			if(null != delimiter){
+				this.appendable.append(delimiter);
+			}
 		} else {
 			if (null == this.appendable) {
 				this.appendable = new StringBuilder();
diff --git a/hutool-core/src/test/java/org/dromara/hutool/core/array/ArrayUtilTest.java b/hutool-core/src/test/java/org/dromara/hutool/core/array/ArrayUtilTest.java
index 6f3f41e16..cde895d97 100644
--- a/hutool-core/src/test/java/org/dromara/hutool/core/array/ArrayUtilTest.java
+++ b/hutool-core/src/test/java/org/dromara/hutool/core/array/ArrayUtilTest.java
@@ -13,7 +13,6 @@
 package org.dromara.hutool.core.array;
 
 import org.dromara.hutool.core.collection.ListUtil;
-import org.dromara.hutool.core.lang.Console;
 import org.dromara.hutool.core.util.CharsetUtil;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
@@ -26,10 +25,9 @@ import java.util.*;
  *
  * @author Looly
  */
-@SuppressWarnings("ConstantValue")
 public class ArrayUtilTest {
 
-	@SuppressWarnings("DataFlowIssue")
+	@SuppressWarnings({"DataFlowIssue", "ConstantValue"})
 	@Test
 	public void isEmptyTest() {
 		final int[] a = {};
@@ -330,6 +328,41 @@ public class ArrayUtilTest {
 		Assertions.assertEquals("aa,bb,cc,dd", join2);
 	}
 
+	@Test
+	public void testJoinWithNullElement() {
+		final String[] array = { "Java", null, "Python" };
+		final String result = ArrayUtil.join(array, ", ", value -> value == null ? "null" : value);
+		Assertions.assertEquals("Java, null, Python", result);
+	}
+
+	@Test
+	public void testJoinWithEmptyArray() {
+		final String[] array = {};
+		final String result = ArrayUtil.join(array, ", ", String::toUpperCase);
+		Assertions.assertEquals("", result);
+	}
+
+	@Test
+	public void testJoinWithoutEditor() {
+		final Integer[] array = { 1, 2, 3 };
+		final String result = ArrayUtil.join(array, ", ");
+		Assertions.assertEquals("1, 2, 3", result);
+	}
+
+	@Test
+	public void testJoinWithEditor() {
+		final String[] array = { "java", "scala", "kotlin" };
+		final String result = ArrayUtil.join(array, " -> ", String::toUpperCase);
+		Assertions.assertEquals("JAVA -> SCALA -> KOTLIN", result);
+	}
+
+	@Test
+	public void testJoinWithNullConjunction() {
+		final String[] array = { "one", "two", "three" };
+		final String result = ArrayUtil.join(array, null, value -> value + "!");
+		Assertions.assertEquals("one!two!three!", result);
+	}
+
 	@Test
 	public void getArrayTypeTest() {
 		Class<?> arrayType = ArrayUtil.getArrayType(int.class);
@@ -656,7 +689,6 @@ public class ArrayUtilTest {
 	void setOrPaddingTest(){
 		final String[] arr = new String[0];
 		final String[] newArr = ArrayUtil.setOrPadding(arr, 2, "Good");
-		Console.log(newArr);
 		Assertions.assertArrayEquals(new String[]{null, null, "Good"}, newArr);
 	}