Example usage for org.jfree.chart.encoders SunPNGEncoderAdapter SunPNGEncoderAdapter

Introduction

In this page you can find the example usage for org.jfree.chart.encoders SunPNGEncoderAdapter SunPNGEncoderAdapter.

Prototype

SunPNGEncoderAdapter

Source Link

Usage

From source file:bzstats.chart.AbstractChartFactory.java

/**
 * Utility function to save an image as a PNG file.
 *
 * @param image//from   w  w  w.  j  a  v a  2 s .c  o  m
 *            The image to save.
 * @param filename
 *            The filename to save the image as.
 * @throws BZStatsException
 *             If the file could not be written.
 */
public static final void savePNGImage(BufferedImage image, String filename) throws BzStatsException {

    File outputfile = new File(filename);

    // overwrite
    if (outputfile.exists()) {
        if (outputfile.canWrite()) {
            outputfile.delete();
        } else {
            throw new BzStatsException("Cannot overwrite " + filename);
        }
    }

    boolean filecreated;
    try {
        filecreated = outputfile.createNewFile();
    } catch (IOException e2) {
        throw new BzStatsException("Failed to create file " + filename);
    }

    if (filecreated) {

        OutputStream out = null;
        try {
            out = new FileOutputStream(outputfile);
        } catch (FileNotFoundException e3) {
            throw new BzStatsException("Failed to write to file " + filename);
        }

        SunPNGEncoderAdapter encoder = new SunPNGEncoderAdapter();

        try {
            encoder.encode(image, out);
        } catch (IOException e) {
            throw new BzStatsException("Failed to encode file " + filename);
        } finally {
            try {
                out.close();
            } catch (IOException e1) {
                throw new BzStatsException("Failed to close file " + filename);
            }
        }
    } else {
        throw new BzStatsException("Failed to create file " + filename);
    }

}

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From source file:org.efs.openreports.actions.ReportViewerAction.java

public String execute() {
    JasperPrint jasperPrint = (JasperPrint) ActionContext.getContext().getSession().get(ORStatics.JASPERPRINT);

    report = (Report) ActionContext.getContext().getSession().get(ORStatics.REPORT);

    if (jasperPrint != null && jasperPrint.getPages() != null) {
        pageCount = jasperPrint.getPages().size();
    }//from ww w  .j  a v  a2  s . co m

    if (!"image".equals(submitType))
        return SUCCESS;

    byte[] imageData = null;

    if (jasperPrint != null) {
        try {
            BufferedImage image = (BufferedImage) JasperPrintManager.printPageToImage(jasperPrint,
                    pageIndex - 1, zoom);
            imageData = new SunPNGEncoderAdapter().encode(image);
        } catch (Exception e) {
            addActionError(e.getMessage());
            log.error(e.toString());
        }
    }

    if (imageData != null) {

        HttpServletResponse response = ServletActionContext.getResponse();

        try {
            response.setContentLength(imageData.length);
            ServletOutputStream ouputStream = response.getOutputStream();
            ouputStream.write(imageData, 0, imageData.length);
            ouputStream.flush();
            ouputStream.close();
        } catch (IOException ioe) {
            log.warn(ioe.toString());
        }
    }

    return NONE;
}

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