要在Apache PDFBox中静默打印PDF时忽略页边距和方向，您可以使用Java的PrinterJob类来实现。下面是代码示例：

import java.awt.print.PageFormat;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.File;
import java.io.IOException;
import org.apache.pdfbox.pdmodel.PDDocument;

public class SilentPrintPDF {
    public static void main(String[] args) {
        try {
            // 加载PDF文档
            PDDocument document = PDDocument.load(new File("input.pdf"));

            // 创建打印作业
            PrinterJob printJob = PrinterJob.getPrinterJob();
            printJob.setPrintService(printJob.getPrintService()); // 设置打印机

            // 设置打印属性
            PageFormat pageFormat = printJob.defaultPage();
            pageFormat.setOrientation(PageFormat.LANDSCAPE); // 设置页面方向
            pageFormat.setPaper(document.getPage(0).getCropBox()); // 使用第一页的页面大小

            // 设置打印页边距为0
            double margin = 0;
            pageFormat.setPaper(new MyPaper(pageFormat.getPaper(), margin));

            // 设置打印监听器，以便在打印完成时关闭文档
            printJob.setPageable(document);
            printJob.print();

            // 关闭文档和打印作业
            document.close();
            printJob.cancel();
        } catch (IOException | PrinterException e) {
            e.printStackTrace();
        }
    }
}

class MyPaper extends PageFormat {
    private double margin;

    public MyPaper(PageFormat pageFormat, double margin) {
        this.margin = margin;
        setOrientation(pageFormat.getOrientation());
        setPaper(pageFormat.getPaper());
    }

    @Override
    public double getImageableX() {
        return super.getImageableX() + margin;
    }

    @Override
    public double getImageableY() {
        return super.getImageableY() + margin;
    }

    @Override
    public double getImageableWidth() {
        return super.getImageableWidth() - 2 * margin;
    }

    @Override
    public double getImageableHeight() {
        return super.getImageableHeight() - 2 * margin;
    }
}

请确保将"input.pdf"替换为您的PDF文件路径。此代码加载PDF文档并将其静默打印到默认打印机，忽略了页边距和方向。MyPaper类用于自定义页面边距。