在Javafx 11+中创建自定义纸张大小

import javafx.print.Paper;
import javafx.print.Printer;
import javafx.print.PrinterJob;
import javafx.scene.transform.Scale;

public class CustomPaper {
    public static void main(String[] args) {
        // 创建自定义纸张大小
        double widthInInches = 8.5;
        double heightInInches = 11;
        Paper customPaper = createCustomPaper(widthInInches, heightInInches);

        // 创建打印任务
        Printer printer = Printer.getDefaultPrinter();
        PrinterJob printerJob = PrinterJob.createPrinterJob(printer);

        // 设置打印纸张大小
        printerJob.getJobSettings().setPageLayout(printer.createPageLayout(customPaper, Printer.MarginType.DEFAULT));

        // 执行打印任务
        if (printerJob != null) {
            boolean success = printerJob.printPage(printNode);
            if (success) {
                printerJob.endJob();
            }
        }
    }

    private static Paper createCustomPaper(double widthInInches, double heightInInches) {
        double widthInPoints = inchesToPoints(widthInInches);
        double heightInPoints = inchesToPoints(heightInInches);
        return Paper.custom(widthInPoints, heightInPoints, PaperUnit.POINTS);
    }

    private static double inchesToPoints(double inches) {
        return inches * 72; // 1 inch = 72 points
    }
}