如何确保使用Java打印API的页面尺寸

Question

我不知道这个标题是否真正解释了我的问题。我有一台认证标签打印机，打印条形码和一些文字。标签是4“x2”标签。问题在于图像从标签左侧打印约1英寸，距离页面顶部约半英寸。出于某种原因，页面尺寸似乎关闭，我无法弄清楚是什么导致了这一点。任何帮助都会很棒。这是我写的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); 
    } 
} 

Answer 1

你可能不得不translate()图形上下文的原点，以反映打印机的成像区域，如图A Basic Printing Program。