Another option you could try is to use a servlet that outputs an image. Then in your JSP, you simply use the <img> tag, call the servlet, and it should render your graph. That way you can have a dynamically created chart fully integrated in your portlet.
The code for your servlet may look like:
response.setContentType("image/png");
JFreeChart myChart = .....;
OutputStream output = response.getOutputStream();
ChartUtilities.writeChartAsPNG(output, myChart, 100, 100);
So if you created a servlet called "MyGraphServlet", in your JSP code, you could simply use:
<img src="<path to servlet>/MyGraphServlet">
You could even pass variables to the servlet if you needed to.
Rotsen Zerolf:
Is there a sample portlet displaying pie charts where all we have to do is pluging our data.
I have been trying to create a portlet using Jfreechart but my knowledge of Java and portlets
creation is very bad.
Thanks,
rotseN
