java - 如何在没有 printDialog() 的情况下打印()？

Question

所以我有这段代码可以打印一些字符串行，我想打印它而不必选择打印机，我该如何设置页面格式？

import java.awt.Graphics;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.JPanel;

public class Test extends JPanel {

    public static void main(String[] args) {
        try {
            PrinterJob pjob = PrinterJob.getPrinterJob();
            pjob.setJobName("Graphics Demo Printout");
            pjob.setCopies(1);
            pjob.setPrintable(new Printable() {
                public int print(Graphics pg, PageFormat pf, int pageNum) {
                    if (pageNum > 0) // we only print one page
                        return Printable.NO_SUCH_PAGE; // ie., end of job

                    pg.drawString("aaaaa", 10, 10);
                    pg.drawString("bbbbb", 10, 20);

                    return Printable.PAGE_EXISTS;
                }
            });

            if (!pjob.printDialog()) // choose printer
                return;
            pjob.print();
        } catch (PrinterException pe) {
            pe.printStackTrace();
        }
    }

}

Answer 1

您可以将 指定为该方法PageFormat的附加参数setPrintable()。要创建一个PageFormat对象，您可以询问该PrinterJob对象。

一旦你提供了一个对象，就不再需要PageFormat调用（至少在我的机器上）。printerDialog()

我已经相应地修改了您的示例代码：

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.print.PrintService;

public class Test {

    public static void main(String[] args) {
        try {
            PrinterJob pjob = PrinterJob.getPrinterJob();
            pjob.setJobName("Graphics Demo Printout");
            pjob.setCopies(1);
            // on my machine `printServices[2]` is a virtual PDF printer - good for testing since it doesn't any paper
            // PrintService[] printServices = PrinterJob.lookupPrintServices();
            // pjob.setPrintService(printServices[2]);
            PageFormat pageFormat = pjob.defaultPage();
            pjob.setPrintable(new Printable() {
                public int print(Graphics pg, PageFormat pf, int pageNum) {
                    if (pageNum > 0) // we only print one page
                        return Printable.NO_SUCH_PAGE; // ie., end of job

                    Font f = pg.getFont();
                    pg.setFont(f.deriveFont(Font.PLAIN, 24));
                    pg.setColor(Color.black);
                    pg.drawString("aaaaa", 100, 100);
                    pg.drawString("bbbbb", 100, 200);

                    return Printable.PAGE_EXISTS;
                }
            }, pageFormat);

            pjob.print();
        } catch (PrinterException pe) {
            pe.printStackTrace();
        }
    }
}