[BUG] JSONObject Cast Exception

[Cooper]

问题描述

类似 #2520，出现JSONObject Cast Exception

环境信息

• OS信息： [MacOS 12.7.4 M1 Pro 16 GB]
• JDK信息： [Openjdk 17.0.6]
• 版本信息：[Fastjson 2.0.49]

重现步骤

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.JSONPath;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class Issue1070Mutated_21 {

    @Test
    public void testExtract1Mutatedfj() {
        String raw = "[[{\"a\":1},{\"a\":2}],[{\"a\":3}]]";
        assertEquals("{\"a\":2}", ((JSONObject) JSONPath.extract(raw, "$[0][1]")).toJSONString());
    }   
}

期待的正确结果

正常转换

相关日志输出

java.lang.ClassCastException: class com.alibaba.fastjson2.JSONObject cannot be cast to class com.alibaba.fastjson.JSONObject (com.alibaba.fastjson2.JSONObject and com.alibaba.fastjson.JSONObject are in unnamed module of loader 'app')

[Shaojin Wen]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.50-SNAPSHOT/
这个问题我没重现，但我还是做了修复处理，请帮忙用2.0.50-SNAPSHOT版本在你本地验证下

[Cooper]

Together with #2520 经验证无问题。辛苦温少

[Shaojin Wen]

https://github.com/alibaba/fastjson2/releases/tag/2.0.50
2.0.50已发布，请用新版本