Question

我正在尝试使用以下代码将字符串Fri August 16 2019 12:08:55 AM转换为LocalDateTime对象：

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEE MMMM d YYYY h:mm:ss a", Locale.US);
String timestamp = "Fri August 16 2019 12:08:55 AM";
localDateTime = LocalDateTime.parse(timestamp, formatter);

此代码引发以下异常：

java.time.format.DateTimeParseException: Text 'Fri August 16 2019 12:08:55 AM' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {WeekBasedYear[WeekFields[SUNDAY,1]]=2019, MonthOfYear=8, DayOfWeek=5, DayOfMonth=16},ISO resolved to 00:08:55 of type java.time.format.Parsed
    at java.time.format.DateTimeFormatter.createError(Unknown Source)
    at java.time.format.DateTimeFormatter.parse(Unknown Source)
    at java.time.LocalDateTime.parse(Unknown Source)
    at suppliers.pojos.PriceFluctuationPOJO.<init>(PriceFluctuationPOJO.java:51)
    at suppliers.pojos.PriceFluctuationPOJO.readFromPriceFluctuationCSVFile(PriceFluctuationPOJO.java:163)
    at amzn.Main.main(Main.java:60)
Caused by: java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {WeekBasedYear[WeekFields[SUNDAY,1]]=2019, MonthOfYear=8, DayOfWeek=5, DayOfMonth=16},ISO resolved to 00:08:55 of type java.time.format.Parsed
    at java.time.LocalDateTime.from(Unknown Source)
    at java.time.format.Parsed.query(Unknown Source)

基于SO上的this和this线程，看来格式是正确的。

是什么引起异常？

谢谢

Answer 1

输入String中不应包含单引号，并且模式已关闭。您需要yyyy（而不是YYYY）。喜欢，

DateTimeFormatter formatter = DateTimeFormatter.ofPattern(
        "EEE MMMM d yyyy hh:mm:ss a", Locale.US);
String timestamp = "Fri August 16 2019 12:08:55 AM";
LocalDateTime localDateTime = LocalDateTime.parse(timestamp, formatter);
System.out.println(localDateTime);

输出（此处）

2019-08-16T00:08:55

无法将格式化的字符串转换为LocalDateTime

1 个答案: