Java：设置可打印宽度（Pageformat）

我试图从我的java应用程序打印到收据打印机，收据的宽度为58mm，似乎边距不正确，并且打印的边距为1英寸任何一边。这导致只打印3个字母/数字而不是整行。我可以成功地从记事本打印，因为我已经手动调整边缘到1.97毫米在任何一方似乎做的伎俩。Java：设置可打印宽度（Pageformat）

我的代码如下;

public int print(Graphics g, PageFormat pf, int pageIndex) 
     throws PrinterException { 

    Font font = new Font("MONOSPACED", Font.PLAIN, 10); 
    FontMetrics metrics = g.getFontMetrics(font); 
    int lineHeight = metrics.getHeight(); 
    if (pageBreaks == null) { 
     initTextLines(); 
     int linesPerPage = (int)(pf.getImageableHeight()/lineHeight); 
     int numBreaks = (textLines.length-1)/linesPerPage; 
     pageBreaks = new int[numBreaks]; 
     for (int b=0; b<numBreaks; b++) { 
      pageBreaks[b] = (b+1)*linesPerPage; 
     } 
    } 

    if (pageIndex > pageBreaks.length) { 
     return NO_SUCH_PAGE; 
    } 

    /* User (0,0) is typically outside the imageable area, so we must 
    * translate by the X and Y values in the PageFormat to avoid clipping 
    * Since we are drawing text we 
    */ 
    Graphics2D g2d = (Graphics2D)g; 
    g2d.setFont(new Font("MONOSPACED", Font.PLAIN, 10)); 
    g2d.translate(pf.getImageableX(), pf.getImageableY()); 

    /* Draw each line that is on this page. 
    * Increment 'y' position by lineHeight for each line. 
    */ 
    int y = 0; 
    int start = (pageIndex == 0) ? 0 : pageBreaks[pageIndex-1]; 
    int end = (pageIndex == pageBreaks.length) 
      ? textLines.length : pageBreaks[pageIndex]; 
    for (int line=start; line<end; line++) { 
     y += lineHeight; 
     g.drawString(textLines[line], 0, y); 
    } 

    /* tell the caller that this page is part of the printed document */ 
    return PAGE_EXISTS; 
}

我也很感激，如果你能帮助我对齐文本到收货的右手侧，以保持它穿制服用了其它系统，但是我的主要问题是，如果是分类，我将保证金超过月亮:)

谢谢！

p.s.我是新来的java打印和努力，可能有复制在线来源的冗余代码。我已经调整了字体，使它更小，这并没有多大帮助。

来源

2016-04-24 J2FX

我已经想出了一个解决方法来获得所需的结果，只是在文本似乎工作良好之前添加空格，我也调整了代码如下;

public void print() throws PrintException, IOException { 
    String defaultPrinter = 
      PrintServiceLookup.lookupDefaultPrintService().getName(); 
    System.out.println("Default printer: " + defaultPrinter); 
    PrintService service = PrintServiceLookup.lookupDefaultPrintService(); 

    InputStream is = new ByteArrayInputStream(printableAmounts.getBytes("UTF8")); 

    PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); 
    pras.add(new Copies(1)); 

    DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE; 
    Doc doc = new SimpleDoc(is, flavor, null); 
    DocPrintJob job = service.createPrintJob(); 

    PrintJobWatcher pjw = new PrintJobWatcher(job); 
    job.print(doc, pras); 
    pjw.waitForDone(); 
    is.close(); 
}

似乎是一个临时的解决方案，但如果没有别的来了就会变成永久性的。

来源

2016-04-26 17:41:49 J2FX

Java：设置可打印宽度（Pageformat）

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