Heroku上的默认字符集（US-ASCII）导致问题 [英] Default Charset on Heroku (US-ASCII) causing problems

问题描述

我们在heroku上部署了一个基于maven-jetty的Java应用程序。

We have a maven--jetty-based Java app deployed on heroku.

本地，当我这样做时：

System.out.println("Default Charset = "+ Charset.defaultCharset());
String s = "Resumé of Schrödinger";
System.out.println("s = "+ s);`

我明白了（按预期）：

Default Charset = UTF-8
s = Resumé of Schrödinger

但是，当我将应用程序推送到heroku并检查日志时，我看到：

But, when I push the app to heroku, and check the logs, I see:

Default Charset = US-ASCII
s = Resum?? of Schr??dinger 

实际上，由于这个原因，我面临更多问题，因为我们必须解码具有UTF-8编码字符的Base-64编码文本。

Actually, I'm facing further problems because of this, since we have to Decode Base-64 encoded text which has UTF-8 encoded characters.

我甚至尝试了以下操作，没有用：

I have even tried the following with no use:

SAXBuilder builder = new SAXBuilder();
InputStream iStream = new ByteArrayInputStream(xmlAsString.getBytes("UTF-8"));
Reader reader = new InputStreamReader(iStream, "UTF-8");
InputSource is = new InputSource(reader);
is.setEncoding("UTF-8");

以后，在做 org.apache.commons.codec.binary时。 Base64.decodeBase64（byte []）我甚至在做 stringObject.getBytes（UTF-8）

And later, when doing org.apache.commons.codec.binary.Base64.decodeBase64(byte []) I am even doing stringObject.getBytes("UTF-8")

但是，我仍然无法看到像e-acute（é），umlaut（ö）等字符。

But still, I am unable to see the characters like e-acute(é), umlaut(ö), etc.

有没有在Heroku上解决这个问题的方法？

Is there any way to solve this on Heroku?

pom.xml中的jdk版本是1.6

The jdk version in pom.xml is 1.6

这是一个怪癖OpenJDK 1.7& Heroku下面的虚拟机？

Is it a quirk of the OpenJDK 1.7 & the virtual machine underneath in Heroku?

提前致谢。

推荐答案

最后，我与Heroku友好的工作人员取得联系 - 他们通过 JAVA_OPTS提出以下建议来覆盖 file.encoding 财产 env-variable。

Finally, I got in touch with the friendly staff at Heroku--they gave the following suggestion to over-ride file.encoding property via the JAVA_OPTS env-variable.

从我的Heroku Toolbelt发出以下内容，&事情现在开始起作用。

Issued the following from my Heroku Toolbelt, & things began working now.

heroku config:add JAVA_OPTS='-Xmx384m -Xss512k -XX:+UseCompressedOops -Dfile.encoding=UTF-8'

这样，JVM可以选择它，&现在 Charset.defaultCharset（）返回 UTF-8 ，特殊字符应该出现！

This way, the JVM picks it up, & now Charset.defaultCharset( ) returns UTF-8, with special characters appearing as they should!

他们还说，我们也可以做以下事情：

They also said, we could alternatively do the following as well:

heroku config:add JAVA_TOOL_OPTIONS='-Dfile.encoding=UTF-8'

此外，这是个好主意将此属性嵌入到应用程序的 Procfile 中，以便当我们将它推送到新的Heroku应用程序时，我们的代码行为相同。

Also, it would be a good idea to embed this property right into the Procfile of the app, so that our code behaves the same when we push it to a new Heroku app.

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