ServletUtilites.saveChartAsPNG question

[Guest]

ServletUtilites.saveChartAsPNG(JFreeChart, int, int, ChartRenderingInfo, HttpSession)
saves the chart in the temporary directory.
But I want the file to be saved in a particular directory(like my home directory)....how would I achieve this.

Regards,
Satish

[mhilpert]

Code: Select all

    /**
     * Save chart to file in PNG format.
     * 
     * @param chart JFreeChart.
     * @param fileName Name of PNG file.
     * @param width Width of PNG image.
     * @param height Height of PNG image.
     * @throws IOException
     */
    public void saveChartToPNG(JFreeChart chart, String fileName, int width, int height) throws IOException {
        if (chart != null) {
            if (fileName == null) {
                String chartTitle = chart.getTitle().getText();
                if (chartTitle != null) {
                    fileName = chartTitle + ".png";
                } else {
                    fileName = "chart.png";
                }
            } 
            ChartUtilities.saveChartAsPNG(new File(fileName), chart, width, height);
        }//else: input unavailable
    }//saveChartToPNG()

[richard_atkinson]

Alternatively, if you still want to use ServletUtilities, you can change the System property "java.io.tmpdir". The ServletUtilities class and DisplayChart servlet will then use the new directory.

Regards,
Richard...

[Tirupathi]

Any chance to set other than java.io.tmpdir.

I really want to store chart images in another directory. Can you suggest how to set the same

[david.gilbert]

The options are as given by the other posters:

(1) Use the ChartUtilities class to save the chart in PNG format wherever you want, but the file will never be deleted (unless you take care of that yourself);

(2) Use the ServletUtilities class and save charts in PNG format to the temp directory specified by java.io.tmpdir, with automatic deletion at session expiry.

[BO]

Hi David
i think that it's better/flexible if we can set the directory stored the chart (actually, it's System.getProperty("java.io.tmpdir") such as a parametre of the servlet
best regards
BO

[BO]

or we can build a method "setStoredDirectory(String dir)" in ServletUtilities