java调用打印机打印pdf

要使用Java调用打印机打印PDF文件，可以使用以下步骤：

1. 使用Java PDF库（如iText或Apache PDFBox）将PDF文件转换为打印格式（如Postscript或PCL）。

2. 使用Java打印API（javax.print包）将已转换的文件发送到打印机。

下面是一个简单的示例代码片段，用于将PDF文件转换为Postscript格式并将其发送到打印机：

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.Copies;
import javax.print.attribute.standard.MediaSizeName;
import javax.print.attribute.standard.Sides;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.printing.PDFPageable;
import org.apache.pdfbox.printing.Scaling;

public class PrintPDF {
    public static void main(String[] args) {
        try {
            // Load PDF document
            PDDocument document = PDDocument.load(new FileInputStream("input.pdf"));

            // Create a PDFPageable object
            PDFPageable pageable = new PDFPageable(document);

            // Set print attributes
            PrintRequestAttributeSet attributes = new HashPrintRequestAttributeSet();
            attributes.add(MediaSizeName.NA_LETTER);
            attributes.add(Sides.ONE_SIDED);
            attributes.add(new Copies(1));

            // Get default print service
            PrintService printService = PrintServiceLookup.lookupDefaultPrintService();

            // Create a DocPrintJob object from the print service
            DocPrintJob printJob = printService.createPrintJob();

            // Create a Doc object from the PDFPageable object
            Doc doc = new SimpleDoc(pageable, DocFlavor.SERVICE_FORMATTED.PAGEABLE, null);

            // Print the document
            printJob.print(doc, attributes);

            // Close the document and print job
            document.close();
            printJob.cancel();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (PrintException e) {
            e.printStackTrace();
        }
    }
}

请注意，这只是一个简单的示例，并且可能需要根据您的具体需求进行更改。