Embed Excel in Java GUI

I'm looking for a way to embed an Excel spread sheet into a Java GUI application. Actually into a Qt GUI build by using QtJambi. The spread sheet does not necessarily be modifiable, but a seamless presentation would be preferable to an explicit opening of the excel application.

I came up with several ideas by scanning the web:

• embed the sheet in an html file and display it by using a browser integrated in java
• j-integra (seems old, requires licencing)
• jacob (no gui support if I am correct)
• use swt.ole classes (the most promising, there's even an example on the web, problem is how to display swt in qt)
• use Qt's 开发者_运维百科ActiveQt (not existent in the Java port)

Has anybody experiences concerning this topic? Any ideas that might be helpful - I would be grateful.

Regards