Example usage for org.jfree.chart ChartUtilities writeChartAsPNG

Introduction

In this page you can find the example usage for org.jfree.chart ChartUtilities writeChartAsPNG.

Prototype

public static void writeChartAsPNG(OutputStream out, JFreeChart chart, int width, int height)
        throws IOException 

Source Link

Document

Writes a chart to an output stream in PNG format.

Usage

From source file:org.openmrs.web.servlet.ShowGraphServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
 *      javax.servlet.http.HttpServletResponse)
 *///from w  w  w  .j a v a2s.  c o  m
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    try {
        JFreeChart chart = getChart(request);

        // get the height and width of the graph
        String widthString = request.getParameter("width");
        String heightString = request.getParameter("height");

        Integer width;
        Integer height;
        if (widthString != null && widthString.length() > 0) {
            width = Integer.parseInt(widthString);
        } else {
            width = 500;
        }
        if (heightString != null && heightString.length() > 0) {
            height = Integer.parseInt(heightString);
        } else {
            height = 300;
        }

        // get the requested mime type of the graph
        String mimeType = request.getParameter("mimeType");
        if (mimeType == null) {
            mimeType = PNG_MIME_TYPE;
        }

        // Modify response to disable caching
        response.setHeader("Pragma", "No-cache");
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-cache");

        // Write chart out to response as image
        try {
            if (JPG_MIME_TYPE.equalsIgnoreCase(mimeType)) {
                response.setContentType(JPG_MIME_TYPE);
                ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, width, height);
            } else if (PNG_MIME_TYPE.equalsIgnoreCase(mimeType)) {
                response.setContentType(PNG_MIME_TYPE);
                ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, width, height);
            } else {
                throw new APIException("unsupported.mime.type", (Object[]) null);
            }
        } catch (IOException e) {
            // if its tomcat and the user simply navigated away from the page, don't throw an error
            if (e.getClass().getName().equals("org.apache.catalina.connector.ClientAbortException")) {
                // do nothing
            } else {
                log.error("Error class name: " + e.getClass().getName());
                log.error("Unable to write chart", e);
            }
        }
    }
    // Add error handling above and remove this try/catch
    catch (Exception e) {
        log.error("An unknown expected exception was thrown while rendering a graph", e);
    }
}

---

From source file:org.madsonic.controller.StatusChartController.java

public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    String type = request.getParameter("type");
    int index = Integer.parseInt(request.getParameter("index"));

    List<TransferStatus> statuses = Collections.emptyList();
    if ("stream".equals(type)) {
        statuses = statusService.getAllStreamStatuses();
    } else if ("download".equals(type)) {
        statuses = statusService.getAllDownloadStatuses();
    } else if ("upload".equals(type)) {
        statuses = statusService.getAllUploadStatuses();
    }/* w w w  .jav  a 2 s  .com*/

    if (index < 0 || index >= statuses.size()) {
        return null;
    }
    TransferStatus status = statuses.get(index);

    TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
    TransferStatus.SampleHistory history = status.getHistory();
    long to = System.currentTimeMillis();
    long from = to - status.getHistoryLengthMillis();
    Range range = new DateRange(from, to);

    if (!history.isEmpty()) {

        TransferStatus.Sample previous = history.get(0);

        for (int i = 1; i < history.size(); i++) {
            TransferStatus.Sample sample = history.get(i);

            long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
            long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());

            double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
            series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);

            previous = sample;
        }
    }

    // Compute moving average.
    series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);

    // Find min and max values.
    double min = 100;
    double max = 250;
    for (Object obj : series.getItems()) {
        TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
        double value = item.getValue().doubleValue();
        if (item.getPeriod().getFirstMillisecond() > from) {
            min = Math.min(min, value);
            max = Math.max(max, value);
        }
    }

    // Add 10% to max value.
    max *= 1.1D;

    // Subtract 10% from min value.
    min *= 0.9D;

    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();

    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
    Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
    plot.setBackgroundPaint(background);

    XYItemRenderer renderer = plot.getRendererForDataset(dataset);
    renderer.setSeriesPaint(0, Color.gray.darker());
    renderer.setSeriesStroke(0, new BasicStroke(2f));

    // Set theme-specific colors.
    Color bgColor = getBackground(request);
    Color fgColor = getForeground(request);

    chart.setBackgroundPaint(bgColor);

    ValueAxis domainAxis = plot.getDomainAxis();
    domainAxis.setRange(range);
    domainAxis.setTickLabelPaint(fgColor);
    domainAxis.setTickMarkPaint(fgColor);
    domainAxis.setAxisLinePaint(fgColor);

    ValueAxis rangeAxis = plot.getRangeAxis();
    rangeAxis.setRange(new Range(min, max));
    rangeAxis.setTickLabelPaint(fgColor);
    rangeAxis.setTickMarkPaint(fgColor);
    rangeAxis.setAxisLinePaint(fgColor);

    ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);

    return null;
}

---

From source file:net.sourceforge.subsonic.controller.StatusChartController.java

public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    String type = request.getParameter("type");
    int index = Integer.parseInt(request.getParameter("index"));

    List<TransferStatus> statuses = Collections.emptyList();
    if ("stream".equals(type)) {
        statuses = statusService.getAllStreamStatuses();
    } else if ("download".equals(type)) {
        statuses = statusService.getAllDownloadStatuses();
    } else if ("upload".equals(type)) {
        statuses = statusService.getAllUploadStatuses();
    }/*  w  w w  .j a v  a2  s  . c o m*/

    if (index < 0 || index >= statuses.size()) {
        return null;
    }
    TransferStatus status = statuses.get(index);

    TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
    TransferStatus.SampleHistory history = status.getHistory();
    long to = System.currentTimeMillis();
    long from = to - status.getHistoryLengthMillis();
    Range range = new DateRange(from, to);

    if (!history.isEmpty()) {

        TransferStatus.Sample previous = history.get(0);

        for (int i = 1; i < history.size(); i++) {
            TransferStatus.Sample sample = history.get(i);

            long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
            long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());

            double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
            series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);

            previous = sample;
        }
    }

    // Compute moving average.
    series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);

    // Find min and max values.
    double min = 100;
    double max = 250;
    for (Object obj : series.getItems()) {
        TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
        double value = item.getValue().doubleValue();
        if (item.getPeriod().getFirstMillisecond() > from) {
            min = Math.min(min, value);
            max = Math.max(max, value);
        }
    }

    // Add 10% to max value.
    max *= 1.1D;

    // Subtract 10% from min value.
    min *= 0.9D;

    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();

    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
    Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
    plot.setBackgroundPaint(background);

    XYItemRenderer renderer = plot.getRendererForDataset(dataset);
    renderer.setSeriesPaint(0, Color.blue.darker());
    renderer.setSeriesStroke(0, new BasicStroke(2f));

    // Set theme-specific colors.
    Color bgColor = getBackground(request);
    Color fgColor = getForeground(request);

    chart.setBackgroundPaint(bgColor);

    ValueAxis domainAxis = plot.getDomainAxis();
    domainAxis.setRange(range);
    domainAxis.setTickLabelPaint(fgColor);
    domainAxis.setTickMarkPaint(fgColor);
    domainAxis.setAxisLinePaint(fgColor);

    ValueAxis rangeAxis = plot.getRangeAxis();
    rangeAxis.setRange(new Range(min, max));
    rangeAxis.setTickLabelPaint(fgColor);
    rangeAxis.setTickMarkPaint(fgColor);
    rangeAxis.setAxisLinePaint(fgColor);

    ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);

    return null;
}

---

From source file:net.sqs2.omr.result.export.chart.ChartImageWriter.java

public void savePieChart(OutputStream outputStream, DefaultPieDataset dataSet) {
    String title = "";

    boolean showLegend = true;
    boolean tooltips = true;
    boolean urls = false;

    JFreeChart chart = ChartFactory.createPieChart(title, dataSet, showLegend, tooltips, urls);
    PiePlot piePlot = (PiePlot) chart.getPlot();

    // chart.getLegend().setLegendItemGraphicEdge(RectangleEdge.RIGHT);
    // chart.getLegend().setLegendItemGraphicLocation(RectangleAnchor.RIGHT);
    chart.getLegend().setPosition(RectangleEdge.RIGHT);
    setSectionPaint(dataSet, piePlot);//  w  ww. j  ava  2s . co m

    try {
        ChartUtilities.writeChartAsPNG(outputStream, chart, this.width, this.height);
    } catch (IOException ioEx) {
        ioEx.printStackTrace();
    }
}

---

From source file:org.psystems.dicom.browser.server.stat.StatClientRequestsChartServlet2.java

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

    response.setContentType("image/png");

    OutputStream outputStream = response.getOutputStream();

    CategoryDataset dataset = createDataset();
    JFreeChart chart = getChart(dataset);
    int width = 800;
    int height = 250;
    ChartUtilities.writeChartAsPNG(outputStream, chart, width, height);

}

---

From source file:com.himtech.googlechart.GglPieChart.java

@RequestMapping(value = "/piechartJfree", method = RequestMethod.GET)
public void drawPieChartJfree(ModelMap model, HttpServletResponse response) {
    response.setContentType("image/png");
    PieDataset dataSet = createDataSet();

    JFreeChart pieChart = createChart(dataSet, "Server Details");
    //model.addAttribute("pieUrl", pieChart.toString());

    try {/*from   w w  w  .j  av a 2s . co  m*/
        ChartUtilities.writeChartAsPNG(response.getOutputStream(), pieChart, 750, 400);
    } catch (IOException e) {
        e.printStackTrace();
    }

}

---

From source file:com.bitplan.vzjava.Plot.java

/**
 * save me as a png file/*from   w ww  .  ja  v  a  2s  .c o  m*/
 * 
 * @param file
 * @param width
 * @param height
 * @throws Exception
 */
public void saveAsPng(File file, int width, int height) throws Exception {
    FileOutputStream outputstream = new FileOutputStream(file);
    ChartUtilities.writeChartAsPNG(outputstream, getChart(), width, height);
    outputstream.close();
}

---

From source file:org.geoserver.wms.ncwms.GetTimeSeriesResponse.java

@SuppressWarnings("rawtypes")
private void writeChart(GetFeatureInfoRequest request, FeatureCollectionType results, OutputStream output,
        String mimeType) throws IOException {
    final TimeSeries series = new TimeSeries("time", Millisecond.class);
    String valueAxisLabel = "Value";
    String title = "Time series";
    final String timeaxisLabel = "Date / time";

    final List collections = results.getFeature();
    if (collections.size() > 0) {
        SimpleFeatureCollection fc = (SimpleFeatureCollection) collections.get(0);
        title += " of " + fc.getSchema().getName().getLocalPart();
        valueAxisLabel = fc.getSchema().getDescription().toString();

        try (SimpleFeatureIterator fi = fc.features()) {
            while (fi.hasNext()) {
                SimpleFeature f = fi.next();
                Date date = (Date) f.getAttribute("date");
                Double value = (Double) f.getAttribute("value");
                series.add(new Millisecond(date), value);
            }/* w ww .j  av  a  2s. c  o  m*/
        }
    }
    XYDataset dataset = new TimeSeriesCollection(series);

    JFreeChart chart = ChartFactory.createTimeSeriesChart(title, timeaxisLabel, valueAxisLabel, dataset, false,
            false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRenderer(new XYLineAndShapeRenderer());
    if (mimeType.startsWith("image/png")) {
        ChartUtilities.writeChartAsPNG(output, chart, IMAGE_WIDTH, IMAGE_HEIGHT);
    } else if (mimeType.equals("image/jpg") || mimeType.equals("image/jpeg")) {
        ChartUtilities.writeChartAsJPEG(output, chart, IMAGE_WIDTH, IMAGE_HEIGHT);
    }
}

---

From source file:edu.ku.brc.specify.toycode.mexconabio.CollectionStats.java

/**
 * @param response/*  w  w w  . j  av a  2 s  . c  o m*/
 * @param type
 * @param alphaList
 * @param title
 * @param xTitle
 * @param yTitle
 */
protected void createChart(final CollStatInfo csi, final Vector<Pair<String, Integer>> list,
        final String xTitle, final String yTitle) {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    for (Pair<String, Integer> p : list) {
        dataset.addValue(p.second, p.first, "");
    }

    //if (StringUtils.isEmpty(csi.getInstName()))
    //{
    //    csi.setInstName(getProviderNameFromInstCode(csi.getProviderId()));
    //}

    JFreeChart chart = ChartFactory.createBarChart(csi.getTitle(), xTitle, yTitle, dataset,
            PlotOrientation.VERTICAL, true, true, false);

    //chart.getCategoryPlot().setRenderer(new CustomColorBarChartRenderer());

    chart.setBackgroundPaint(new Color(228, 243, 255));

    try {
        Integer hashCode = csi.hashCode();
        csi.setChartFileName(hashCode + ".png");
        DataOutputStream dos = new DataOutputStream(
                new FileOutputStream(new File("reports/charts/" + csi.getChartFileName())));
        ChartUtilities.writeChartAsPNG(dos, chart, 700, 600);

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

---

From source file:org.lsug.quota.portlet.ServerQuotaPortlet.java

@Override
public void serveResource(ResourceRequest resourceRequest, ResourceResponse resourceResponse)
        throws IOException, PortletException {

    String type = ParamUtil.getString(resourceRequest, "type", "currentSize");

    StringBundler sb = new StringBundler(5);

    JFreeChart jFreeChart = null;/* ww w.  j a  v a 2 s .c  o m*/

    if (type.equals("currentSize")) {
        long classNameId = PortalUtil.getClassNameId(Company.class.getName());

        String orderByCol = "quotaUsed";
        String orderByType = "desc";
        OrderByComparator orderByComparator = QuotaUtil.getQuotaOrderByComparator(orderByCol, orderByType);
        DefaultPieDataset pieDataset = new DefaultPieDataset();

        try {
            List<Quota> listCompanyQuota = QuotaLocalServiceUtil.getQuotaByClassNameId(classNameId,
                    QueryUtil.ALL_POS, QueryUtil.ALL_POS, orderByComparator);

            for (Quota quota : listCompanyQuota) {
                if (quota.isEnabled()) {
                    pieDataset.setValue(CompanyLocalServiceUtil.getCompany(quota.getClassPK()).getWebId(),
                            quota.getQuotaUsed());
                }
            }
        } catch (Exception e) {
            LOGGER.error(e);
            throw new PortletException(e);
        }

        sb.append(QuotaUtil.getResource(resourceRequest, "server-current-used-size-diagram-title"));

        jFreeChart = getCurrentSizeJFreeChart(sb.toString(), pieDataset);
    }

    OutputStream outputStream = null;

    resourceResponse.setContentType(ContentTypes.IMAGE_PNG);

    try {
        outputStream = resourceResponse.getPortletOutputStream();
        ChartUtilities.writeChartAsPNG(outputStream, jFreeChart, 400, 200);
    } finally {
        if (outputStream != null) {
            outputStream.close();
        }
    }
}

---

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