How can I draw two JFreeCharts to the same document using iTextPdf - itext

Question

I want to print two Jfree charts in the same document using iTextPdf, when I tried using this code, the following JFreeChart overwrite the previous one. As a result I got the second chart on both of two pages of the pdf.
public void ExportChart(OutputStream out, int width, int height) throws IOException, DocumentException {
Rectangle rect = new com.itextpdf.text.Rectangle((float) width, (float) height+130);
Document document = new com.itextpdf.text.Document(rect);
PdfWriter writer = null;
writer=PdfWriter.getInstance(document, out);
document.open();
document.add(addHeaderInfo(width));
DefaultFontMapper mapper = new DefaultFontMapper();
FontFactory.registerDirectories();
PdfContentByte cb = writer.getDirectContent();
PdfTemplate tp = cb.createTemplate(width, height);
Graphics2D g2d = tp.createGraphics(width, height, mapper);
tp.setWidth(width);
tp.setHeight(height);
//barStat is a JFreeChart Objecct
barStat.draw(g2d, new java.awt.Rectangle(width, height));
cb.addTemplate(tp, 0, 0);
document.newPage();
SingleHistogramDialog singleHD=new SingleHistogramDialog();
JFreeChart barStat2=singleHD.Histogram();
document.add(addHeaderInfo(width));
FontFactory.registerDirectories();
tp.setWidth(width);
tp.setHeight(height);
barStat2.draw(g2d, new java.awt.Rectangle(width, height));
g2d.dispose();
cb.addTemplate(tp, 0, 0);
document.close();
}

Answer 1

I copied your code literally, and I made a couple of changes:
public void ExportChart(OutputStream out, int width, int height) throws IOException, DocumentException {
Rectangle rect = new com.itextpdf.text.Rectangle((float) width, (float) height+130);
Document document = new com.itextpdf.text.Document(rect);
PdfWriter writer = null;
writer=PdfWriter.getInstance(document, out);
document.open();
document.add(addHeaderInfo(width));
DefaultFontMapper mapper = new DefaultFontMapper();
FontFactory.registerDirectories();
PdfContentByte cb = writer.getDirectContent();
PdfTemplate tp = cb.createTemplate(width, height);
Graphics2D g2d = tp.createGraphics(width, height, mapper);
//barStat is a JFreeChart Objecct
barStat.draw(g2d, new java.awt.Rectangle(width, height));
cb.addTemplate(tp, 0, 0);
document.newPage();
SingleHistogramDialog singleHD=new SingleHistogramDialog();
JFreeChart barStat2=singleHD.Histogram();
document.add(addHeaderInfo(width));
tp = cb.createTemplate(width, height);
g2d = tp.createGraphics(width, height, mapper);
barStat2.draw(g2d, new java.awt.Rectangle(width, height));
g2d.dispose();
cb.addTemplate(tp, 0, 0);
document.close();
}

Answer 2

I solved my problem by changing my above code this way
public void ExportChart(OutputStream out, int width, int height) throws
IOException, DocumentException {
Rectangle rect = new com.itextpdf.text.Rectangle((float) width, (float)
height+130);
Document document = new com.itextpdf.text.Document(rect);
PdfWriter writer = null;
writer=PdfWriter.getInstance(document, out);
document.open();
document.add(addHeaderInfo(width));
DefaultFontMapper mapper = new DefaultFontMapper();
FontFactory.registerDirectories();
PdfContentByte cb = writer.getDirectContent();
PdfTemplate tp = cb.createTemplate(width, height);
Graphics2D g2d = tp.createGraphics(width, height, mapper);
tp.setWidth(width);
tp.setHeight(height);
barStat.draw(g2d, new java.awt.Rectangle(width, height));
Histogram singleHD=new Histogram();
JFreeChart barStat2=singleHD.Histogram();
PdfTemplate tp2 = cb.createTemplate(width, height);
Graphics2D g2d2 = tp2.createGraphics(width, height, mapper);
tp2.setWidth(width);
tp2.setHeight(height);
barStat2.draw(g2d2, new java.awt.Rectangle(width, height));
g2d.dispose();
cb.addTemplate(tp, 0, 0);
document.newPage();
document.add(addHeaderInfo(width));
g2d2.dispose();
cb.addTemplate(tp2, 0, 0);
document.close();
}