[BUG] java.util.Arrays$ArrayList反序列化失败

[dyj2012]

问题描述

java.util.Arrays$ArrayList反序列化失败。

重现步骤

如何操作可以重现该问题：

1. 使用 Arrays.asList("cacheObject", "cacheObject2", "cacheObject3") 存字符串，用JSONB反解析失败
2. 输入 Arrays.asList("cacheObject", "cacheObject2", "cacheObject3") 数据
3. 出现 Caused by: java.lang.InstantiationException: java.util.Arrays$ArrayList at java.lang.Class.newInstance(Class.java:427) at com.alibaba.fastjson2.reader.FieldReaderListStrMethod.readFieldValue(FieldReaderListStrMethod.java:54) ... 49 more Caused by: java.lang.NoSuchMethodException: java.util.Arrays$ArrayList.<init>() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.newInstance(Class.java:412) ... 50 more 错误

期待的正确结果

对您期望发生的结果进行清晰简洁的描述。

相关日志输出

请复制并粘贴任何相关的日志输出。
org.springframework.data.redis.serializer.SerializationException: Could not deserialize: create instance error class java.util.Arrays$ArrayList; nested exception is com.alibaba.fastjson2.JSONException: create instance error class java.util.Arrays$ArrayList

附加信息

修改了FieldReaderListStrMethod源码解决了这个问题，增加了listType == ObjectReaderImplList.CLASS_ARRAYS_LIST

package com.alibaba.fastjson2.reader;

import com.alibaba.fastjson2.JSONArray;
import com.alibaba.fastjson2.JSONException;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.util.Fnv;
import com.alibaba.fastjson2.util.TypeUtils;

import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.*;

final class FieldReaderListStrMethod<T>
        extends FieldReaderObjectMethod<T>
        implements FieldReaderList<T, Object> {
    final long fieldClassHash;

    FieldReaderListStrMethod(String fieldName, Type fieldType, Class fieldClass, int ordinal, long features, String format, Method method) {
        super(fieldName, fieldType, fieldClass, ordinal, features, format, method);
        this.fieldClassHash = Fnv.hashCode64(TypeUtils.getTypeName(fieldClass));
    }

    @Override
    public Type getItemType() {
        return String.class;
    }

    @Override
    public void readFieldValue(JSONReader jsonReader, T object) {
        List value;
        if (jsonReader.isJSONB()) {
            Class listType = fieldClass;
            ObjectReader objectReader = jsonReader.checkAutoType(fieldClass, fieldClassHash, features);
            if (objectReader != null) {
                listType = objectReader.getObjectClass();
            }

            int itemCnt = jsonReader.startArray();
            if (itemCnt == -1) {
                value = null;
            } else if (listType == Collection.class
                    || listType == AbstractCollection.class
                    || listType == List.class
                    || listType == AbstractList.class
                    || listType == ArrayList.class
                    || listType == ObjectReaderImplList.CLASS_ARRAYS_LIST) {
                value = new ArrayList(itemCnt);
            } else if (listType == LinkedList.class) {
                value = new LinkedList();
            } else if (listType == JSONArray.class) {
                value = new JSONArray(itemCnt);
            } else {
                try {
                    value = (List) listType.newInstance();
                } catch (InstantiationException | IllegalAccessException e) {
                    throw new JSONException("create instance error " + listType, e);
                }
            }

            for (int i = 0; i < itemCnt; ++i) {
                value.add(jsonReader.readString());
            }
        } else if (jsonReader.current() == '[') {
            List list = createList();
            jsonReader.next();
            for (; ; ) {
                if (jsonReader.nextIfMatch(']')) {
                    break;
                }

                list.add(jsonReader.readString());

                if (jsonReader.nextIfMatch(',')) {
                    continue;
                }
            }
            accept(object, list);

            jsonReader.nextIfMatch(',');

            value = list;
        } else {
            throw new JSONException("json format error : " + jsonReader.current());
        }
        try {
            method.invoke(object, value);
        } catch (Exception e) {
            throw new JSONException("set " + fieldName + " error", e);
        }
    }
}