Java – the default character set (us-ascii) on heroku causes problems

We deployed a Java application based on Maven jetty on heroku

Locals, when I do this:

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

I see (as expected):

Default Charset = UTF-8
s = Resumé of Schrödinger

However, when I push the application to heroku and check the log, I see:

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

In fact, I have more problems because we have to decode base-64 encoded text with UTF-8 encoded characters

I've even tried the following:

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");

Later, I was doing org apache. commons. codec. binary. Base64. When decodebase64 (byte []), I even made stringobject getBytes(“UTF-8”)

However, I still can't see characters like e - acute (é), umlaut (ö), etc

Is there any way to solve this problem on heroku?

pom. The JDK version in XML is 1.6

This is openjdk 1.7 & amp; Virtual machine under heroku?

Thank you in advance

Solution

Finally, I got in touch with the friendly staff of heroku – they made the following suggestions through Java_ Opts env variable overrides file Encoding property

From my heroku toolkit, send out the following, & things are now working

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

In this way, the JVM can select it, & now charset Defaultcharset() returns UTF-8. Special characters should appear!

They also said that we could also do the following:

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

In addition, it is a good idea to embed this property directly into the application's procfile, so that our code behaves the same when we push it to a new heroku application