Is there a way to use UTF-8 with app engine?

Question

I\'m looking for some explanation on how the app engine deals with character encodings. I\'m working on a client-server application where the server is on app engine.

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Answer 1

I see two things you should do.

1) set system-properties (if you are using it) to utf8 in your appengine-web.xml

OK that above is what I have but the docs suggest this below:

https://developers.google.com/appengine/docs/java/config/appconfig

2) specify the encoding when you set the content type or it will revert to the default

The content type may include the type of character encoding used, for example, text/html; charset=ISO-8859-4.

I'd try

resp.setContentType("application/json; charset=UTF-8");

You could also try a writer which lets you set the content type to it directly.

http://docs.oracle.com/javaee/1.3/api/javax/servlet/ServletResponse.html#getWriter%28%29
http://docs.oracle.com/javaee/1.3/api/javax/servlet/ServletResponse.html#setContentType(java.lang.String)

For what it's worth, I need utf8 for Japanese content and I have no trouble. I'm not using a filter or setContentType anyway. I am using gwt and #1 above and it works.