在SimpleDateFormat中日期解析行为不当 [英] Misbehaving of the date parsing in SimpleDateFormat

问题描述

我在JBoss服务器的jar文件中有一个Java类，该类通过bash文件调用，如下所示.

I have a java class inside the jar file that is in a JBoss server which invoked through a bash file as follows.

java -cp /com/site/domain/TimeFormatter.jar packOne.subPack.Test

但是在其中解析以下日期时出现错误.

But I got an error when parsing the below date in there.

java.text.ParseException: Unparseable date: "Wed, 29 Jan 2014 21:00:00 GMT"
    at java.text.DateFormat.parse(DateFormat.java:335)

Java代码:

Date date = new SimpleDateFormat("EEE, dd MMM yyyy hh:mm:ss z").parse("Sun, 26 Jan 2014 21:00:00 GMT");
System.out.println("main().date : " + date);

我在这里想念什么?我读过许多有关SimpleDateFormat行为异常的文章.但这是我在那些帖子中找不到的东西.

What am I missing here? I read many posts about the misbehaving of the SimpleDateFormat. But this is some thing that I didn't find among those posts.

注意:我认为这是由于Java版本更改或某些原因引起的.但是，我在计算机中执行了不同版本的同一程序.效果很好. 服务器Java版本"1.5.0_22"

Note : I thought this is because of the java version change or some thing. But, I executed the same program with different versions in my machine. It worked perfectly. Server java version "1.5.0_22"

语言环境详细信息:

LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

推荐答案

对我来说很好用，我认为这不是与 Java版本相关的问题...而是更多的Locale问题:)

Works fine for me, and I think it's not a Java version-related issue... but more of a Locale problem :)

为您的SimpleDateFormat指定Locale.ENGLISH应该可以使其正常工作.例如，您可以这样做:

Specifying Locale.ENGLISH for your SimpleDateFormat should definitively make it work. For example, you could do:

final Date date = new SimpleDateFormat("EEE, dd MMM yyyy hh:mm:ss z", Locale.ENGLISH).parse("Sun, 26 Jan 2014 21:00:00 GMT");

---

按照 SimpleDateFormat的javadoc条目中的指定

，日期解析是 locale-sensitive .我必须承认我不完全知道您的字符串与您的Locale,不匹配，但是如果...我们知道您的默认Locale实际上是什么，我们可以进一步调查:)

---

As specified in the javadoc entry for SimpleDateFormat, the date parsing is locale-sensitive. I have to admit that I don't exactly know how your string does not match your Locale, but we can investigate further if... we know what your default Locale actually is :)

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