java - 如何使用Java Print API确保页面尺寸

我不知道标题是否真的能说明我的问题。我有一台认知标签打印机，正在向其中打印条形码和一些文本。标签是4“ x2”标签。问题是图像打印距离标签左侧约一英寸，距页面顶部约半英寸。由于某些原因，页面尺寸似乎不正确，我不知道是什么原因造成的。任何帮助都会很棒。这是我正在编写的PrintService类的完整代码。

import java.awt.Color;
import java.awt.Graphics;
import java.awt.print.*;
import java.awt.image.BufferedImage;

import javax.print.attribute.*;
import javax.print.attribute.standard.*;

import net.sourceforge.barbecue.*;

public class PrintService implements Printable {

    BufferedImage bi;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        PrintService printService = new PrintService(args);
    }

    PrintService(String[] args) {
      switch(new Integer(args[0])) {
        case 1: printPackageLabel(args[1]); break;
        default:
      }
    }

  private void printPackageLabel(String barcode) {

    bi = getBarcode(barcode);

    //-- Create a printerJob object
    PrinterJob printJob = PrinterJob.getPrinterJob();

    PageFormat pageFormat = printJob.defaultPage();

    Paper paper = new Paper();

    //-- 4" x 2"
    paper.setSize(288,144);

    //-- x,y,width,height
    paper.setImageableArea(0, 0, 200, 110);

    pageFormat.setPaper(paper);

    //-- Set the printable class to this one since we
    //-- pass in the PageFormat object
    printJob.setPrintable(this, pageFormat);

    //PrintRequestAttributeSet attr_set = new HashPrintRequestAttributeSet();
    //attr_set.add(new MediaSize(0,0, 292));

    //-- disable print dialog
    //if (printJob.printDialog()) {
      try {
       printJob.print();
      } catch (Exception PrintException) {
        PrintException.printStackTrace();
      }
    //}

  }

  private BufferedImage getBarcode (String data) {
  Barcode barcode = null;
  BufferedImage bufferedImage = null;
    try {
        barcode = BarcodeFactory.createCode128(data);
        barcode.setBarWidth(1);
        barcode.setBarHeight(20);
        barcode.setDrawingText(true);
    } catch (BarcodeException e) {
        throw new RuntimeException(e);
    }
    try {
        bufferedImage = BarcodeImageHandler.getImage(barcode);
    } catch (Exception  e) {
        throw new RuntimeException(e);
    }
   return bufferedImage;
  }


  public int print(Graphics g, PageFormat pageFormat, int page) {

    if (page == 0) {

      g.setColor(Color.black);

      //-- Prints a box aroung the imageable area
      //-- start(x1,y1),stop(x2,y2)
      g.drawLine(0,0,200,0);
      g.drawLine(0,0,0,110);
      g.drawLine(0,110,200,110);
      g.drawLine(200,0,200,110);

      //-- image,offset(x,y),dimensions(width,height), imageObserver null
      g.drawImage(bi,5,5,150,50,null);

      //-- identify top left corner - to be removed
      g.drawOval(0, 0, 10, 10);
      //-- string, x, y
      g.drawString("<Item>",5,65);
      g.drawString("<Type>",5,75);
      g.drawString("<Weight>",5,85);
      g.drawString("Packaged: <DateTime>",5,95);

      return (PAGE_EXISTS);
     } else
      return (NO_SUCH_PAGE);
   }
}

最佳答案

您可能必须translate()图形上下文的原点以反映打印机的可成像区域，如A Basic Printing Program中所示。