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rowstop avatar rowstop commented on June 4, 2024

是这个错误吗？

java.lang.NullPointerException
	at com.alibaba.fastjson2.reader.FieldReader.compareTo(FieldReader.java:331)
	at com.alibaba.fastjson2.reader.ObjectReaderCreator.putIfAbsent(ObjectReaderCreator.java:3160)
	at com.alibaba.fastjson2.reader.ObjectReaderCreator.createFieldReader(ObjectReaderCreator.java:1498)
	at com.alibaba.fastjson2.reader.ObjectReaderCreator.lambda$createFieldReaders$4(ObjectReaderCreator.java:1588)
	at com.alibaba.fastjson2.util.BeanUtils.setters(BeanUtils.java:564)
	at com.alibaba.fastjson2.reader.ObjectReaderCreator.createFieldReaders(ObjectReaderCreator.java:1584)
	at com.alibaba.fastjson2.reader.ObjectReaderCreatorASM.createObjectReader(ObjectReaderCreatorASM.java:259)
	at com.alibaba.fastjson2.reader.ObjectReaderProvider.getObjectReaderInternal(ObjectReaderProvider.java:854)
	at com.alibaba.fastjson2.reader.ObjectReaderProvider.getObjectReader(ObjectReaderProvider.java:746)
	at com.alibaba.fastjson2.JSON.parseObject(JSON.java:720)
	at com.alibaba.fastjson2.issues_2200.Issue2233.test(Issue2233.java:20)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at java.util.ArrayList.forEach(ArrayList.java:1259)
	at java.util.ArrayList.forEach(ArrayList.java:1259)

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rowstop avatar rowstop commented on June 4, 2024

可以加上泛型 如List<Object>可以解决这个问题

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wwulfric avatar wwulfric commented on June 4, 2024

@rowstop 不是npe，报错是我贴的代码的最后一行：throw new JSONException(jsonReader.info("TODO : " + this.getClass()));

类型没问题，List<MyType> xxx 这样写的

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rowstop avatar rowstop commented on June 4, 2024

没复现，按理说如果是 null 应该走不到这里，前面就直接返回了
能否给个可复现demo

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rowstop avatar rowstop commented on June 4, 2024

哦，没有无参构造方法是不？

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wwulfric avatar wwulfric commented on June 4, 2024

哦，没有无参构造方法是不？

是的，估计用的lombok 的 builder，所以没有默认的无参构造方法

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