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java如何打印文件

2026-03-23 18:30:15Java

打印文件的方法

在Java中打印文件可以通过多种方式实现，以下介绍几种常见的方法：

java如何打印文件

使用Java Print Service API

Java Print Service API提供了一套标准的打印接口，可以用于打印文本或图像文件。以下是一个简单的示例代码：

java如何打印文件

import javax.print.*;
import javax.print.attribute.*;
import java.io.*;

public class PrintFileExample {
    public static void main(String[] args) throws IOException, PrintException {
        File file = new File("example.txt");
        FileInputStream fis = new FileInputStream(file);

        DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE;
        Doc doc = new SimpleDoc(fis, flavor, null);

        PrintService[] services = PrintServiceLookup.lookupPrintServices(null, null);
        if (services.length > 0) {
            DocPrintJob job = services[0].createPrintJob();
            job.print(doc, null);
        }

        fis.close();
    }
}

使用Java AWT Printing

对于简单的文本打印，可以使用AWT的打印功能：

import java.awt.*;
import java.awt.print.*;
import java.io.*;

public class AWTPrintExample implements Printable {
    public static void main(String[] args) {
        PrinterJob job = PrinterJob.getPrinterJob();
        job.setPrintable(new AWTPrintExample());

        if (job.printDialog()) {
            try {
                job.print();
            } catch (PrinterException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
        if (pageIndex > 0) {
            return NO_SUCH_PAGE;
        }

        Graphics2D g2d = (Graphics2D) graphics;
        g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());

        try {
            BufferedReader reader = new BufferedReader(new FileReader("example.txt"));
            String line;
            int y = 20;
            while ((line = reader.readLine()) != null) {
                g2d.drawString(line, 50, y);
                y += 15;
            }
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return PAGE_EXISTS;
    }
}

使用第三方库

对于更复杂的打印需求，可以考虑使用第三方库如Apache PDFBox（打印PDF文件）：

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.printing.PDFPageable;

import java.awt.print.PrinterJob;
import java.io.File;

public class PDFPrintExample {
    public static void main(String[] args) throws Exception {
        PDDocument document = PDDocument.load(new File("example.pdf"));
        PrinterJob job = PrinterJob.getPrinterJob();
        job.setPageable(new PDFPageable(document));

        if (job.printDialog()) {
            job.print();
        }

        document.close();
    }
}