[BUG] JSON.toJSONString以后通过parseObject转回原对象类型报错

[MartinDai]

问题描述

JSON.toJSONString以后通过parseObject转回原对象类型报错

环境信息

请填写以下信息：

• OS信息： MacOS 13.3.1
• JDK信息： Openjdk 1.8.0_312
• 版本信息：Fastjson2 2.0.26-2.0.27

重现步骤

public class Test {

    static class Inner {
        private int f1;

        public int getF1() {
            return f1;
        }

        public void setF1(int f1) {
            this.f1 = f1;
        }
    }

    List<Map<String, List<Inner>>> list = new ArrayList<>();

    public List<Map<String, List<Inner>>> getList() {
        return list;
    }

    public void setList(List<Map<String, List<Inner>>> list) {
        this.list = list;
    }

    public static void main(String[] args) {
        Test test = new Test();
        Inner inner = new Inner();
        ArrayList<Inner> innerList = new ArrayList<>();
        innerList.add(inner);
        HashMap<String, List<Inner>> map = new HashMap<>();
        map.put("innerList", innerList);
        List<Map<String, List<Inner>>> list = new ArrayList<>();
        list.add(map);
        test.setList(list);
        String toJson = JSON.toJSONString(test);
        Test fromJson = JSON.parseObject(toJson, Test.class);
        System.out.println(fromJson.getList().size());
    }
}

期待的正确结果

可以正常转回原来的类型对象

相关日志输出

Exception in thread "main" com.alibaba.fastjson2.JSONException: illegal fieldName input0, offset 30, character 0, line 1, column 31, fastjson-version 2.0.27 {"list":[{"innerList":[{"f1":0}]}]}
at com.alibaba.fastjson2.JSONReaderUTF16.readFieldNameHashCode(JSONReaderUTF16.java:1055)
at com.alibaba.fastjson2.reader.ORG_2_1_Inner.readObject(Unknown Source)
at com.alibaba.fastjson2.reader.ObjectReaderImplList.readObject(ObjectReaderImplList.java:500)
at com.alibaba.fastjson2.reader.ObjectReaderImplMapTyped.readObject(ObjectReaderImplMapTyped.java:344)
at com.alibaba.fastjson2.reader.ObjectReaderImplList.readObject(ObjectReaderImplList.java:541)
at com.alibaba.fastjson2.reader.ObjectReaderImplMapTyped.readObject(ObjectReaderImplMapTyped.java:344)
at com.alibaba.fastjson2.reader.ORG_1_1_Test.readObject(Unknown Source)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:644)
at com.doodl6.springboot.rocketmq.consumer.Test.main(Test.java:46)

附加信息

在Fastjson2 2.0.25版本是可以正常转回去的

[wenshao]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.28-SNAPSHOT/
问题已修复，请帮忙有2.0.8-SNAPSHOT版本验证，2.0.28版本预计会在周末发布

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.28
请用新版本