fix code

hutool-core/src/main/java/org/dromara/hutool/core/array/ArrayUtil.java

@@ -21,6 +21,7 @@ import org.dromara.hutool.core.convert.Convert;
 import org.dromara.hutool.core.exception.ExceptionUtil;
 import org.dromara.hutool.core.exception.HutoolException;
 import org.dromara.hutool.core.lang.Assert;
+import org.dromara.hutool.core.lang.Console;
 import org.dromara.hutool.core.map.MapUtil;
 import org.dromara.hutool.core.text.StrJoiner;
 import org.dromara.hutool.core.text.StrUtil;
@@ -553,6 +554,23 @@ public class ArrayUtil extends PrimitiveArrayUtil {
 		return ArrayWrapper.of(array).setOrAppend(index, value).getRaw();
 	}
 
+	/**
+	 * 将元素值设置为数组的某个位置，当index小于数组的长度时，替换指定位置的值，否则追加{@code null}或{@code 0}直到到达index后，设置值
+	 *
+	 * @param <A>   数组类型
+	 * @param array 已有数组
+	 * @param index 位置，大于等于长度则追加，否则替换
+	 * @param value 新值
+	 * @return 新数组或原有数组
+	 * @since 6.0.0
+	 */
+	public static <A> A setOrPadding(final A array, final int index, final Object value) {
+		if (index == 0 && isEmpty(array)) {
+			return ofArray(value, null == array ? null : array.getClass().getComponentType());
+		}
+		return ArrayWrapper.of(array).setOrPadding(index, value).getRaw();
+	}
+
 	/**
 	 * 从数组中的指定位置开始，按顺序使用新元素替换旧元素<br>
 	 * <ul>

hutool-core/src/main/java/org/dromara/hutool/core/array/ArrayWrapper.java

@@ -2,8 +2,10 @@ package org.dromara.hutool.core.array;
 
 import org.dromara.hutool.core.collection.iter.ArrayIter;
 import org.dromara.hutool.core.convert.Convert;
-import org.dromara.hutool.core.lang.Assert;
+import org.dromara.hutool.core.exception.HutoolException;
 import org.dromara.hutool.core.func.Wrapper;
+import org.dromara.hutool.core.lang.Assert;
+import org.dromara.hutool.core.reflect.ClassUtil;
 import org.dromara.hutool.core.util.ObjUtil;
 
 import java.lang.reflect.Array;
@@ -266,6 +268,46 @@ public class ArrayWrapper<A, E> implements Wrapper<A>, Iterable<E> {
 	}
 	// endregion
 
+	/**
+	 * 将元素值设置为数组的某个位置，当index小于数组的长度时，替换指定位置的值，否则追加{@code null}或{@code 0}直到到达index后，设置值
+	 *
+	 * @param index 位置
+	 * @param value 新元素或新数组
+	 * @return this
+	 * @since 6.0.0
+	 */
+	@SuppressWarnings("unchecked")
+	public ArrayWrapper<A, E> setOrPadding(final int index, final E value) {
+		return setOrPadding(index, value, (E) ClassUtil.getDefaultValue(this.componentType));
+	}
+
+	/**
+	 * 将元素值设置为数组的某个位置，当index小于数组的长度时，替换指定位置的值，否则追加{@code paddingElement}直到到达index后，设置值
+	 *
+	 * @param index 位置
+	 * @param value 新元素或新数组
+	 * @param paddingElement 填充
+	 * @return this
+	 * @since 6.0.0
+	 */
+	public ArrayWrapper<A, E> setOrPadding(final int index, final E value, final E paddingElement) {
+		if (index < this.length) {
+			Array.set(array, index, value);
+		} else {
+			// issue#3286, 增加安全检查，最多增加2倍
+			if(index > (length + 1) * 2) {
+				throw new HutoolException("Index is  too large:", index);
+			}
+
+			for (int i = length; i < index; i++) {
+				append(paddingElement);
+			}
+			append(value);
+		}
+
+		return this;
+	}
+
 	/**
 	 * 将元素值设置为数组的某个位置，当给定的index大于等于数组长度，则追加
 	 *
@@ -314,7 +356,7 @@ public class ArrayWrapper<A, E> implements Wrapper<A>, Iterable<E> {
 	 * @return 新数组
 	 */
 	public ArrayWrapper<A, E> insert(final int index, final E element) {
-		return insertArray(index, ArrayUtil.ofArray(element));
+		return insertArray(index, ArrayUtil.ofArray(element, this.componentType));
 	}
 
 	/**

hutool-core/src/main/java/org/dromara/hutool/core/bean/BeanPath.java

@@ -15,6 +15,7 @@ package org.dromara.hutool.core.bean;
 import org.dromara.hutool.core.collection.CollUtil;
 import org.dromara.hutool.core.collection.ListUtil;
 import org.dromara.hutool.core.convert.Convert;
+import org.dromara.hutool.core.lang.Console;
 import org.dromara.hutool.core.map.MapUtil;
 import org.dromara.hutool.core.math.NumberUtil;
 import org.dromara.hutool.core.text.StrUtil;

hutool-core/src/main/java/org/dromara/hutool/core/bean/BeanUtil.java

@@ -337,11 +337,10 @@ public class BeanUtil {
 		if (bean instanceof Map) {
 			((Map) bean).put(fieldNameOrIndex, value);
 		} else if (bean instanceof List) {
-			// 相对于5.x逻辑变更，与数组逻辑保持一致
+			ListUtil.setOrPadding((List) bean, Convert.toInt(fieldNameOrIndex), value);
-			ListUtil.setOrAppend((List) bean, Convert.toInt(fieldNameOrIndex), value);
 		} else if (ArrayUtil.isArray(bean)) {
 			// issue#3008，追加产生新数组，此处返回新数组
-			return ArrayUtil.setOrAppend(bean, Convert.toInt(fieldNameOrIndex), value);
+			return ArrayUtil.setOrPadding(bean, Convert.toInt(fieldNameOrIndex), value);
 		} else {
 			// 普通Bean对象
 			FieldUtil.setFieldValue(bean, fieldNameOrIndex, value);

hutool-core/src/main/java/org/dromara/hutool/core/reflect/FieldUtil.java

@@ -270,7 +270,7 @@ public class FieldUtil {
 	 * @throws HutoolException 包装IllegalAccessException异常
 	 */
 	public static void setFieldValue(final Object obj, final String fieldName, final Object value) throws HutoolException {
-		Assert.notNull(obj);
+		Assert.notNull(obj,  "Object must be not null !");
 		Assert.notBlank(fieldName);
 
 		final Field field = getField((obj instanceof Class) ? (Class<?>) obj : obj.getClass(), fieldName);

hutool-core/src/test/java/org/dromara/hutool/core/array/ArrayUtilTest.java

@@ -13,6 +13,7 @@
 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.dromara.hutool.core.util.ObjUtil;
 import org.junit.jupiter.api.Assertions;
@@ -551,6 +552,14 @@ public class ArrayUtilTest {
 		Assertions.assertArrayEquals(new int[]{2}, o);
 	}
 
+	@Test
+	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);
+	}
+
 	@Test
 	public void getAnyTest() {
 		final String[] a = {"a", "b", "c", "d", "e"};

hutool-core/src/test/java/org/dromara/hutool/core/bean/BeanPathTest.java

@@ -148,6 +148,15 @@ public class BeanPathTest {
 		Assertions.assertEquals("{list=[[null, {name=张三}]]}", map.toString());
 	}
 
+	@Test
+	public void putTest() {
+		final Map<String, Object> map = new HashMap<>();
+
+		BeanPath beanPath = BeanPath.of("list[1].name");
+		beanPath.set(map, "张三");
+		Assertions.assertEquals("{list=[null, {name=张三}]}", map.toString());
+	}
+
 	@Test
 	public void putByPathTest() {
 		final Dict dict = new Dict();