如何将 YYYYMMDDHHMMSS 转换为“date"可读的日期 [英] How to convert YYYYMMDDHHMMSS to a date readable by `date`

问题描述

我有一组 YYYYMMDDHHMMSS 格式的日期/时间字符串，我想将其转换为 date 实用程序可读的内容.通常，我可以执行以下操作:

I have a set of date/time strings in the YYYYMMDDHHMMSS format that I want to convert to something readable by the date utility. Usually, I can do something like:

date -d "2010-10-01 12:34:56"

然而，date 不喜欢 YYYYMMDDHHMMSS:

However, date does not like the YYYYMMDDHHMMSS:

date -d "20100101123456"..无效日期

因此，我可能需要将字符串细化为先前的格式.我认为 sed 是答案，但它很快变得丑陋.我很确定我的字符串将是正确的格式，那么如何轻松转换它们?

So, I probably need to refine the string to be in the prior format. I'm thinking sed is the answer, but it gets ugly very fast. I'm quite certain my strings will be the proper format, so how do I easily convert them?

推荐答案

date 不允许YYYYMMDDHHMMSS"，但它允许YYYYMMDD HH:MM:SS"，所以:

date doesn't allow "YYYYMMDDHHMMSS", but it does "YYYYMMDD HH:MM:SS", so:

D="20100101123456"
date -d "${D:0:8} ${D:8:2}:${D:10:2}:${D:12:2}"

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