[BUG] Exception in JSONObject.toJavaObject concerning Enum

[Cooper-Zhong]

问题描述

类似 #2531，fastjson2和fastjson 在JSONObject.toJavaObject 对Enum的处理不一致。fastjson2没有抛异常而fastjson报错。

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.fastjson2.JSON;
import org.junit.jupiter.api.Test;

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

public class Issue1106Mutated_127 {
    @Test
    public void test() {
        assertSame(UserStatus.NORMAL, JSON.parseObject("{\"state\":0}").toJavaObject(User.class).state);
        assertEquals(UserStatus.LOCKED, JSON.parseObject("{\"state\":1}").toJavaObject(User.class).state);
        assertNull(JSON.parseObject("{\"state\":-1}").toJavaObject(User.class).state);
    }

    @Test
    public void testfj() {
        assertSame(UserStatus.NORMAL, com.alibaba.fastjson.JSON.parseObject("{\"state\":0}").toJavaObject(User.class).state);
        assertEquals(UserStatus.LOCKED, com.alibaba.fastjson.JSON.parseObject("{\"state\":1}").toJavaObject(User.class).state);
        assertNull(com.alibaba.fastjson.JSON.parseObject("{\"state\":-1}").toJavaObject(User.class).state);
    }

    public enum UserStatus {
        NORMAL(0),
        LOCKED(1);

        private final byte code;

        UserStatus(int code) {
            this.code = (byte) code;
        }

        public byte getCode() {
            return this.code;
        }
    }

    public class User {
        public UserStatus state;
    }
}

期待的正确结果

期望两者统一出一个合理的处理方式

相关日志输出

com.alibaba.fastjson2.JSONException: No enum ordinal issues.Issue1106Mutated_127.UserStatus.-1

at com.alibaba.fastjson2.reader.ObjectReaderImplEnum.readObject(ObjectReaderImplEnum.java:238)
at com.alibaba.fastjson2.reader.FieldReader.acceptAny(FieldReader.java:456)
at com.alibaba.fastjson2.reader.ObjectReaderAdapter.createInstance(ObjectReaderAdapter.java:659)
at com.alibaba.fastjson.JSONObject.toJavaObject(JSONObject.java:1011)
at Issue1106Mutated_127.testfj(Issue1106Mutated_127.java:20)

[wenshao]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson/2.0.50-SNAPSHOT/
问题已修复，请帮忙用2.0.50-SNAPSHOT版本验证下

[Cooper-Zhong]

经验证已修复，辛苦wenshao

[wenshao]

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