JSP and JFREECHART, Creating and Deleting an IMAGE

**demosai** · 01-03-2013, 06:18 AM

Hi Guys, This is my question: Why when I load this JAVASCRIPT after my JFREECHART script, it load the whole picture but doesn't loads the whole page, why?

How can I solve this? By the way, I mark the specific script I am having problem with, I just want to create a graph image file, load it on the page and have it deleted.

<%

final DefaultCategoryDataset data = new DefaultCategoryDataset();
for (int a = 0; a < progtosummaryexec.getRowCount(); a++){

data.addValue(progtosummaryexec.getInt("java", a), "JAVA", Integer.toString(progtosummaryexec.getInt("out", a)));
data.addValue(progtosummaryexec.getInt("c++", a), "C++", Integer.toString(progtosummaryexec.getInt("out", a)));
data.addValue(progtosummaryexec.getInt("perl", a), "PERL", Integer.toString(progtosummaryexec.getInt("out", a)));

}

final JFreeChart StackedBarChart = ChartFactory.createStackedBarChart(
"", "Out", "DATA", data, PlotOrientation.VERTICAL, true, true, false);

final CategoryPlot plot = StackedBarChart.getCategoryPlot();
//plot.setForegroundAlpha(0.5f);//

BarRenderer barRenderer = (BarRenderer)plot.getRenderer();
barRenderer.setSeriesPaint(0, new Color(0, 200, 0));
barRenderer.setSeriesPaint(1, new Color(102, 102, 102));
barRenderer.setSeriesPaint(2, new Color(200, 100, 0));

StackedBarChart.setBackgroundPaint(new Color(255, 255, 255));

try {
final ChartRenderingInfo info = new ChartRenderingInfo
(new StandardEntityCollection());

final File file1 = new File("C:/Users/a0222144/Documents/NetBeansProjects/Delayed_Reprobe_Report/web/StackedBarChart.png");

__________________________________________________ ________________________________
ChartUtilities.saveChartAsPNG(file1, StackedBarChart, 750, 400, info);

FileInputStream fis = new FileInputStream(file1);
OutputStream os = response.getOutputStream();
long fileLength = file1.length();
byte[] byteStream = new byte[(int)fileLength];
fis.read(byteStream, 0, (int)fileLength);
response.setContentType("image/png");
response.setContentLength((int)fileLength);

fis.close();
os.write(byteStream);
os.flush();
os.close();
__________________________________________________ ________________________________
%>

<IMG SRC="StackedBarChart.png" alt="Right-click this message and Select Refresh/Reload..." WIDTH="750" HEIGHT="400">

<%

file1.delete();
}

catch (Exception e) {out.println(e); }

%>