Buongiorno, a suo tempo avevo ravanato un po' in giro per la rete fino a trovare un esempio (non ricordo dove), comunque ti posto la classe che ho ricavato:
codice:
import javax.swing.*;
import javax.swing.table.*;
import java.awt.print.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.Dimension;
public class StampaTabella implements Printable {
JFrame frame;
JTable tableView;
public StampaTabella(JTable Tabella) {
tableView = Tabella;
}
public void Stampa() {
PrinterJob pj=PrinterJob.getPrinterJob();
pj.setPrintable(StampaTabella.this);
pj.printDialog();
try{
pj.print();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
public int print(Graphics g, PageFormat pageFormat, int pageIndex) throws PrinterException {
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.black);
int fontHeight = g2.getFontMetrics().getHeight();
int fontDesent = g2.getFontMetrics().getDescent();
//leave room for page number
double pageHeight = pageFormat.getImageableHeight()-fontHeight;
double pageWidth = pageFormat.getImageableWidth();
double tableWidth = (double)tableView.getColumnModel().getTotalColumnWidth();
double scale = 1;
if (tableWidth >= pageWidth) {
scale = pageWidth / tableWidth;
}
double headerHeightOnPage = tableView.getTableHeader().getHeight() * scale;
double tableWidthOnPage = tableWidth * scale;
double oneRowHeight = (tableView.getRowHeight() + tableView.getRowMargin()) * scale;
int numRowsOnAPage = (int)((pageHeight - headerHeightOnPage) / oneRowHeight);
double pageHeightForTable = oneRowHeight * numRowsOnAPage;
int totalNumPages= (int)Math.ceil(((double)tableView.getRowCount()) / numRowsOnAPage);
if(pageIndex>=totalNumPages) {
return NO_SUCH_PAGE;
}
g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
g2.drawString("Page: "+(pageIndex+1),(int)pageWidth/2-35,
(int)(pageHeight+fontHeight-fontDesent));//bottom center
g2.translate(0f,headerHeightOnPage);
g2.translate(0f,-pageIndex*pageHeightForTable);
//TODO this next line treats the last page as a full page
g2.setClip(0, (int)(pageHeightForTable*pageIndex),(int)
Math.ceil(tableWidthOnPage),
(int) Math.ceil(pageHeightForTable));
g2.scale(scale,scale);
tableView.paint(g2);
g2.scale(1/scale,1/scale);
g2.translate(0f,pageIndex*pageHeightForTable);
g2.translate(0f, -headerHeightOnPage);
g2.setClip(0, 0,(int) Math.ceil(tableWidthOnPage),
(int)Math.ceil(headerHeightOnPage));
g2.scale(scale,scale);
tableView.getTableHeader().paint(g2);//paint header at top
return Printable.PAGE_EXISTS;
}
}
Fatto questo per stampare una jtable scrivo questo:
codice:
StampaTabella prn = new StampaTabella(stat); // stat è la jtable da stampare
prn.Stampa();
prn = null;
Ci mette un po' comunque più o meno funziona.
Ciao