Spire.PDF for Java支持在Java应用程序中打印PDF文档。本文将介绍以下几种常见方式打印PDF文档：

• 静默打印
• 显示打印对话框打印
• 打印PDF时自定义纸张大小

静默打印即使用默认打印机直接打印PDF文档。打印时，我们可以设置打印份数，设置纸张打印页边距等。

import com.spire.pdf.*;
import java.awt.print.*;

public class Print {
    public static void main(String[] args) {
        //加载文档
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile("Sample.pdf");

        PrinterJob loPrinterJob = PrinterJob.getPrinterJob();
        PageFormat loPageFormat  = loPrinterJob.defaultPage();
        Paper loPaper = loPageFormat.getPaper();

        //删除默认页边距
        loPaper.setImageableArea(0,0,loPageFormat.getWidth(),loPageFormat.getHeight());

        //设置打印份数
        loPrinterJob.setCopies(2);

        loPageFormat.setPaper(loPaper);
        loPrinterJob.setPrintable(pdf,loPageFormat);
        try {
            loPrinterJob.print();
        } catch (PrinterException e) {
            e.printStackTrace();
        }
    }
}

显示打印对话框打印PDF文档

import com.spire.pdf.*;
import java.awt.print.*;

public class Print {
    public static void main(String[] args) {
        //加载文档
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile("Sample.pdf");

        PrinterJob loPrinterJob = PrinterJob.getPrinterJob();
        PageFormat loPageFormat  = loPrinterJob.defaultPage();
        Paper loPaper = loPageFormat.getPaper();

        //删除默认页边距
        loPaper.setImageableArea(0,0,loPageFormat.getWidth(),loPageFormat.getHeight());

        loPageFormat.setPaper(loPaper);
        loPrinterJob.setPrintable(pdf,loPageFormat);

        //显示打印对话框
        if (loPrinterJob.printDialog()) {
            try {
                loPrinterJob.print();
            } catch (PrinterException e) {
                e.printStackTrace();
            }
        }
    }
}

打印时自定义纸张大小

import com.spire.pdf.*;
import java.awt.print.*;

public class Print {

    public static void main(String[] args) {

        //加载文档
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile("Sample.pdf");

        PrinterJob loPrinterJob = PrinterJob.getPrinterJob();
        PageFormat loPageFormat  = loPrinterJob.defaultPage();

       //设置打印纸张大小
        Paper loPaper = loPageFormat.getPaper();
        loPaper.setSize(500,600);
        loPageFormat.setPaper(loPaper);
                loPrinterJob.setPrintable(pdf,loPageFormat);
     
        try {
            loPrinterJob.print();
        } catch (PrinterException e) {
            e.printStackTrace();
        } 
    }
}