fix code

hutool-json/src/main/java/org/dromara/hutool/json/convert/JSONConverter.java

@@ -20,10 +20,12 @@ import org.dromara.hutool.core.convert.ConvertException;
 import org.dromara.hutool.core.convert.Converter;
 import org.dromara.hutool.core.convert.RegisterConverter;
 import org.dromara.hutool.core.convert.impl.*;
+import org.dromara.hutool.core.lang.Console;
 import org.dromara.hutool.core.map.MapWrapper;
 import org.dromara.hutool.core.reflect.ConstructorUtil;
 import org.dromara.hutool.core.reflect.TypeReference;
 import org.dromara.hutool.core.reflect.TypeUtil;
+import org.dromara.hutool.core.reflect.kotlin.KClassUtil;
 import org.dromara.hutool.core.text.StrUtil;
 import org.dromara.hutool.core.util.ObjUtil;
 import org.dromara.hutool.json.*;
@@ -210,6 +212,11 @@ public class JSONConverter implements Converter {
 
 		// 尝试转Bean
 		if (BeanUtil.isBean(rawType)) {
+			// issue#I5WDP0 对于Kotlin对象，由于参数可能非空限制，导致无法创建一个默认的对象再赋值
+			if(KClassUtil.isKotlinClass(rawType) && json instanceof JSONGetter){
+				return KClassUtil.newInstance(rawType, new JSONGetterValueProvider<>((JSONGetter<String>)json));
+			}
+
 			return BeanCopier.of(json,
 					ConstructorUtil.newInstanceIfPossible(rawType), targetType,
 					InternalJSONUtil.toCopyOptions(json.config())).copy();

hutool-json/src/main/java/org/dromara/hutool/json/convert/JSONGetterValueProvider.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2023 looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.json.convert;
+
+import org.dromara.hutool.core.bean.copier.ValueProvider;
+import org.dromara.hutool.json.JSONGetter;
+
+import java.lang.reflect.Type;
+
+/**
+ * JSONGetter的ValueProvider
+ *
+ * @param <K> 键类型
+ * @author looly
+ */
+public class JSONGetterValueProvider<K> implements ValueProvider<K> {
+
+	private final JSONGetter<K> jsonGetter;
+
+	/**
+	 * 构造
+	 *
+	 * @param jsonGetter {@link JSONGetter}
+	 */
+	public JSONGetterValueProvider(final JSONGetter<K> jsonGetter) {
+		this.jsonGetter = jsonGetter;
+	}
+
+	@Override
+	public Object value(final K key, final Type valueType) {
+		return jsonGetter.get(key, valueType);
+	}
+
+	@Override
+	public boolean containsKey(final K key) {
+		return !jsonGetter.isNull(key);
+	}
+}

hutool-json/src/test/java/org/dromara/hutool/json/issueI5WDP0/ERPProduct.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2023 looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.json.issueI5WDP0
+
+data class ERPProduct(
+	var code:String,
+	var status:String
+)

hutool-json/src/test/java/org/dromara/hutool/json/issueI5WDP0/JsonToBeanTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023 looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.json.issueI5WDP0;
+
+import org.dromara.hutool.json.JSONUtil;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class JsonToBeanTest {
+	@Test
+	void toBeanTest() {
+		final String jsonStr = "{\"code\": \"201\", \"status\": \"ok\"}";
+		final ERPProduct bean = JSONUtil.toBean(jsonStr, ERPProduct.class);
+		Assertions.assertNotNull(bean);
+		Assertions.assertEquals("201", bean.getCode());
+		Assertions.assertEquals("ok", bean.getStatus());
+	}
+}