Saving a PNG file on a server in a Java bean, using JSTL

Question

I am writing an update page in JSTL where the user inputs some numbers. I then call a java bean - passing the numbers as parameters - which, using JFreeChart, creates a PNG

Answer 1

I would suggest that you use the ServletUtilities class. It saves in the java tempdir AND cleans up when the session is invalidated. :) Another hint for then displaying the file is to use the DisplayChart servlet to get your images. This goes in web.xml

      
    DisplayChart
    org.jfree.chart.servlet.DisplayChart
  
   
        DisplayChart
        /servlet/DisplayChart
    

This is then how you display the image using jstl: