Java 8 LocalDate不会解析有效的日期字符串 [英] Java 8 LocalDate won't parse valid date string

问题描述

Java 8。我有以下代码：

Java 8 here. I have the following code:

final String createdDateStr = "20110920";
final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("YYYYMMdd");
final LocalDate localDate = LocalDate.parse(createdDateStr, formatter);

在运行时我得到以下异常：

At runtime I get the following exception:

java.time.format.DateTimeParseException: Text '20110920' could not be parsed at index 0

    at java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:1949)
    at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1851)
    at java.

...从 LocalDate.parse（...）中抛出调用。 解析器有什么问题？！

推荐答案

文档：

LocalDate date = LocalDate.now();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy MM dd");
String text = date.format(formatter);
LocalDate parsedDate = LocalDate.parse(text, formatter);

您应该使用yyyyMMdd而不是 年月日。提到 Y 和 y 之间的差异这里。

You should use "yyyyMMdd" instead of "YYYYMMdd". The difference between Y and y was mentioned here.

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