java 使用PrinterJob在java swing中按下JButton时如何打印页面？
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How to print a page when a JButton is pressed in java swing using PrinterJob?
提问by prayagupd
I tried the following code AWT but at runtime shows multiple print dialogs repeatedly....
我尝试了以下代码 AWT 但在运行时重复显示多个打印对话框....
package printerjob;
import java.awt.BasicStroke;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.WindowAdapter;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
/**
* @author pragX
*/
public class FramePrinterJob extends Frame implements Printable {
public void start(){
add(button);
}
@Override
public void paint(Graphics graphics) {
PrinterJob printerJob=PrinterJob.getPrinterJob();
printerJob.setPrintable(this);
if(printerJob.printDialog()){
try{
printerJob.print();
}catch(PrinterException printerException){
//printerException.printStackTrace();
System.out.println("Error Printing." + printerException);
}
}
}
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
throws PrinterException {
//throw new UnsupportedOperationException("Not supported yet.");
if(pageIndex>=1){
return Printable.NO_SUCH_PAGE;
}
graphics.translate((int) pageFormat.getImageableX(),
(int)pageFormat.getImageableY());
Graphics2D graphics2D=(Graphics2D)graphics;
graphics2D.setStroke(new BasicStroke(4f));
graphics2D.drawLine(20, 20, 20, 120);
graphics2D.drawLine(40, 20, 40, 120);
graphics2D.drawLine(20, 70, 40, 70);
graphics2D.drawLine(60, 70, 60, 120);
graphics2D.drawLine(60, 40, 60, 45);
return Printable.PAGE_EXISTS;
}
public static void main(String args[]) {
Frame frame=new FramePrinterJob();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(){
System.exit(0);
}
});
frame.setSize(300,400);
frame.setVisible(true);
}
}
采纳答案by trashgod
You probably don't want to override the paint()method of Framefor this. Instead, invoke the print dialogs in your print button's actionPerformed()method, as seen in this examplefrom A Basic Printing Program.
您可能不想为此覆盖paint()方法Frame。相反，在调用打印按钮的打印对话框actionPerformed()的方法，如在这个例子从一个基本的打印程序。
