年份和基于周的年份之间的区别? [英] Difference between year-of-era and week-based-year?

问题描述

Java 8 的 DateTimeFormatter 类有一个方法，ofPattern(String pattern)，它可以让你从 Az, az 的字符串定义格式> 字母.示例没有阐明 y、year-of-era 和 Y、week-based-year.它是什么?

Java 8's DateTimeFormatter class has a method, ofPattern(String pattern), that lets you define a format from a string of A-z, a-z letters. The examples don't clarify the difference between y, year-of-era and Y, week-based-year. What is it?

Symbol  Meaning                     Presentation      Examples
------  -------                     ------------      -------
 y       year-of-era                 year              2004; 04
 Y       week-based-year             year              1996; 96

推荐答案

这是year-week"的年份值样式日期，如 2006-W52.如果所讨论的周跨越年份边界，则它可能与年代值相差 +1 或 -1.

That's year value for "year-week" style dates, as in 2006-W52. It may be off the year-of-era value by +1 or -1 if the week in question straddles year boundary.

参见http://en.wikipedia.org/wiki/ISO_8601#Week_dates

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