graficzne statystyki

Using JFreeChart with Seam can be quite useful:

package example.chartprocesser;

@Name("chartprocesser")
public class ChartProcesserBean {

 @In
 EntityManager em; // Entity Manager to access the database

 byte[] chart; // chart image (.png) as a byte array

 @Factory(value="chart")
 public void createChart() {

     DefaultCategoryDataset ds = this.getData;

     JFreeChart chart = ChartFactory.createLineChart(
             "TITLE",
             "Category Label",
             "Axis Lable",
             ds,
             PlotOrientation.HORIZONTAL,
             false,
             false,
             false
             );

     try{
       this.chart = ChartUtilities.encodeAsPNG(chart.createBufferedImage(400, 400));
     } catch (IOException e){
   e.printStackTrace();
     }

 }

 private DefaultCategoryDataset getData(){
     //get the data and put into DefaultCategoryDataset
     //Then return it.
 }
}

In your JSF page:

<
s:graphicImage value="#{chartprocesser.chart}" /
>