[BUG] 纳秒精度的时间字符串，反序列化成Date类型不兼容

[zyhui98]

问题描述

原因是升级JDK21之后，LocalDateTime默认精度从毫秒升级到纳秒了。

重现代码如下：

@Data
public class TestBean {
    private Date time;
}

public static void main(String[] args) throws Exception {
        String s = "{\"time\":\"2024-12-04T20:43:15.000000999\"}";
        System.out.println(JSONObject.parseObject(s, TestBean.class));
}

异常堆栈：
Exception in thread "main" java.time.format.DateTimeParseException: Text '2024-12-04T20:43:15.000000999' could not be parsed, unparsed text found at index 19
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2111)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:2010)
at java.base/java.time.LocalDateTime.parse(LocalDateTime.java:494)
at com.alibaba.fastjson2.reader.ObjectReaderImplDate.readDate(ObjectReaderImplDate.java:148)
at com.alibaba.fastjson2.reader.ObjectReaderImplDate.readObject(ObjectReaderImplDate.java:48)
at com.alibaba.fastjson2.reader.ORG_1_1_TestBean.readObject(Unknown Source)
at com.alibaba.fastjson.JSON.parseObject(JSON.java:542)

[wenshao]

你用的是什么版本，我测试下来是支持的