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();
        } 
    }
}