Java EE (Java Enterprise Edition) General Discussion

I am writing a web-based workflow application and want to provide the ability for the user to visualize their flow with a flowchart.

My options are to:

1. Create this flowchart on the server and pass back an image.
2. To create a file format for an existing software package and send that to the client.

For option 1 I'm looking for software that programmatically lets me create a flowchart. Then I plan to create an image (using Acme GIFEncoder) and sending that to the client. Is JLink a good solution for this? Has anyone used it in production?

For option 2 I could create a file for a client side viewer (like Visio or something else). My question there would be does anyone know how to generate a Visio .vsd file that could be sent to the client and opened ni visio?

Any help would be appreciated.