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Question

में थर्मल प्रिंटर के साथ प्रिंटिंग रिसीप्स मुझे जावा का उपयोग करके थर्मल प्रिंटर के माध्यम से प्राप्तियां प्रिंट करना है। मैंने सब कुछ किया है। मेरा प्रोग्राम डेटाबेस से डेटा लेता है और विशेष वर्ण, टैब और \ n का उपयोग करके एक स्ट्रिंग में परिवर्तित होता है। फिर स्ट्रिंग को दूसरी विधि पर भेज दिया जाता है जो इसे ग्राफिक्स में परिवर्तित करता है।

समस्या यह है कि जब मैं प्रिंट बटन पर क्लिक करता हूं, तो सफेद पेपर बाहर आता है। मैंने देखा कि मेरे स्ट्रिंग के पहले 4-5 वर्ण पेपर के चरम छोर पर दाएं कोने पर बिल की आखिरी पंक्ति पर मुद्रित हो रहे हैं। मेरा प्रिंटर ईपीएसन टीएम - टी 81 है।

public void printThisBill() 
    { 

     DefaultTableModel mod = (DefaultTableModel) jTable1.getModel(); 
     DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy"); 
     DateFormat timeFormat = new SimpleDateFormat("HH:mm"); 
     //get current date time with Date() 
     Date date = new Date(); 
     Date time = new Date(); 
     String Date = dateFormat.format(date); 
     String Time = timeFormat.format(time); 
     String Header = 
      " ****Super Market****  \n" 
      + "Date: "+Date+"  Time: "+Time+"\n" 
      + "---------------------------------\n" 
      + "Name   Qty Rate  Amt\n" 
      + "---------------------------------\n"; 

     String amt =  
      "\n \n \nTotal Amount = "+ amt() +"\n" 
      + "Tax =" + tax() + "\n" 
      + "*********************************\n" 
      + "Thank you. \n"; 

     String bill = Header; 
     int i = 0; 
     do 
     { 

     String name =  ""+ mod.getValueAt(i, 2); 
     String qty =  ""+ mod.getValueAt(i, 3); 
     String rate =  ""+ mod.getValueAt(i, 4); 
     String amount = ""+ mod.getValueAt(i, 6); 

     if(name.length() > 12) 
     { 
      name = name.substring(0, 12)+" "; 
     } 
     else 
     { 
      for(int j= name.length()-12; j<= name.length(); j++); 
      { 
       name = name+" "; 
      } 
     } 


     if(qty.length()<=5) 
     { 
      for(int j= 0; j<= qty.length()-5; j++); 
      { 
       qty = qty+" "; 
      } 
     } 

     rate = rate; 
     String items = 
      name+"\t"+qty+"\t"+rate+"\t"+amount+"\n"; 

     bill = bill+ items;  
     i++; 

    } while(i <= mod.getRowCount()-1); 

    bill = bill+amt; 
    System.out.println(bill); 
    printCard(bill); 
    dispose(); 
} 

और विधि कि बिल प्रिंट है:

public static void printCard(final String bill) 
{ 
     Printable contentToPrint = new Printable(){ 
     @Override 
     public int print(Graphics graphics, PageFormat pageFormat, int page) throws PrinterException 
     { 
      if (page > 0) { 
       return NO_SUCH_PAGE; 
      } 
      pageFormat.setOrientation(PageFormat.LANDSCAPE); 
      Graphics2D g2d = (Graphics2D)graphics.create(); 

      g2d.setPaint(Color.black); 
      g2d.setFont(new Font("Arial", Font.BOLD, 10)); 
      g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableX()); 



      g2d.drawString(bill, 0, 0); 

      return PAGE_EXISTS; 
     } 
     }; 

     PrinterJob job = PrinterJob.getPrinterJob(); 
     job.setPrintable(contentToPrint); 
     //You can show a print dialog before printing by job by wrapping the following blocks with a conditional statement if(job.printDialog()){...} 
     try 
     { 
      job.print(); 
     } catch (PrinterException e) 
     { 
      System.err.println(e.getMessage()); 
     } 

} 

समस्या क्या है और मैं इसे कैसे हल कर सकते हैं? मुझे लगता है कि मैं drawString() विधि पर सही पैरामीटर सेट नहीं कर रहा हूं।

या यह कुछ और है? किसी भी मदद की मेरी सराहना की जाएगी।

Answer 1

हम्म, मुझे लगता है कि आपको अपने प्रिंटर के लिए ईएससी/पीओएस कमांड का उपयोग करना चाहिए, Epson TM - T81 के लिए प्रिंटर तकनीकी मैनुअल पढ़ें। मुझे टीएम-यू 220 डी के साथ समान समस्याएं थीं और मैंने इसके लिए एक कक्षा लिखी थी। यह आपकी मदद नहीं कर सकते हैं के रूप में प्रिंटर अलग, वैसे भी यह एक संदर्भ के रूप संलग्न कर रहा हूँ रहे हैं:

//------------------------ 
//-- PrinterOptions.java 
//------------------------ 

public class PrinterOptions { 
    String commandSet = ""; 

    public String initialize() { 
     final byte[] Init = {27, 64}; 
     commandSet += new String(Init); 
     return new String(Init); 
    } 

    public String chooseFont(int Options) { 
     String s = ""; 
     final byte[] ChooseFontA = {27, 77, 0}; 
     final byte[] ChooseFontB = {27, 77, 1}; 
     final byte[] ChooseFontC = {27, 77, 48}; 
     final byte[] ChooseFontD = {27, 77, 49}; 

     switch(Options) { 
      case 1: 
      s = new String(ChooseFontA); 
      break; 

      case 2: 
      s = new String(ChooseFontB); 
      break; 

      case 3: 
      s = new String(ChooseFontC); 
      break; 

      case 4: 
      s = new String(ChooseFontD); 
      break; 

      default: 
      s = new String(ChooseFontB); 
     } 
     commandSet += s; 
     return new String(s); 
    } 

    public String feedBack(byte lines) { 
     final byte[] Feed = {27,101,lines}; 
     String s = new String(Feed); 
     commandSet += s; 
     return s; 
    } 

    public String feed(byte lines) { 
     final byte[] Feed = {27,100,lines}; 
     String s = new String(Feed); 
     commandSet += s; 
     return s; 
    } 

    public String alignLeft() { 
     final byte[] AlignLeft = {27, 97,48}; 
     String s = new String(AlignLeft); 
     commandSet += s; 
     return s; 
    } 

    public String alignCenter() { 
     final byte[] AlignCenter = {27, 97,49}; 
     String s = new String(AlignCenter); 
     commandSet += s; 
     return s; 
    } 

    public String alignRight() { 
     final byte[] AlignRight = {27, 97,50}; 
     String s = new String(AlignRight); 
     commandSet += s; 
     return s; 
    } 

    public String newLine() { 
     final byte[] LF = {10}; 
     String s = new String(LF); 
     commandSet += s; 
     return s; 
    } 

    public String reverseColorMode(boolean enabled) { 
     final byte[] ReverseModeColorOn = {29, 66, 1}; 
     final byte[] ReverseModeColorOff = {29, 66, 0}; 

     String s = ""; 
     if(enabled) 
      s = new String(ReverseModeColorOn); 
     else 
      s = new String(ReverseModeColorOff); 

     commandSet += s; 
     return s; 
    } 

    public String doubleStrik(boolean enabled) { 
     final byte[] DoubleStrikeModeOn = {27, 71, 1}; 
     final byte[] DoubleStrikeModeOff = {27, 71, 0}; 

     String s=""; 
     if(enabled) 
      s = new String(DoubleStrikeModeOn); 
     else 
      s = new String(DoubleStrikeModeOff); 

     commandSet += s; 
     return s; 
    } 

    public String doubleHeight(boolean enabled) { 
     final byte[] DoubleHeight = {27, 33, 17}; 
     final byte[] UnDoubleHeight={27, 33, 0}; 

     String s = ""; 
     if(enabled) 
      s = new String(DoubleHeight); 
     else 
      s = new String(UnDoubleHeight); 

     commandSet += s; 
     return s; 
    } 

    public String emphasized(boolean enabled) { 
     final byte[] EmphasizedOff={27 ,0}; 
     final byte[] EmphasizedOn={27 ,1}; 

     String s=""; 
     if(enabled) 
      s = new String(EmphasizedOn); 
     else 
      s = new String(EmphasizedOff); 

     commandSet += s; 
     return s; 
    } 

    public String underLine(int Options) { 
     final byte[] UnderLine2Dot = {27, 45, 50}; 
     final byte[] UnderLine1Dot = {27, 45, 49}; 
     final byte[] NoUnderLine = {27, 45, 48}; 

     String s = ""; 
     switch(Options) { 
      case 0: 
      s = new String(NoUnderLine); 
      break; 

      case 1: 
      s = new String(UnderLine1Dot); 
      break; 

      default: 
      s = new String(UnderLine2Dot); 
     } 
     commandSet += s; 
     return new String(s); 
    } 

    public String color(int Options) { 
     final byte[] ColorRed = {27, 114, 49}; 
     final byte[] ColorBlack = {27, 114, 48}; 

     String s = ""; 
     switch(Options) { 
      case 0: 
      s = new String(ColorBlack); 
      break; 

      case 1: 
      s = new String(ColorRed); 
      break; 

      default: 
      s = new String(ColorBlack); 
     } 
     commandSet += s; 
     return s; 
    } 

    public String finit() { 
     final byte[] FeedAndCut = {29, 'V', 66, 0}; 

     String s = new String(FeedAndCut); 

     final byte[] DrawerKick={27,70,0,60,120}; 
     s += new String(DrawerKick); 

     commandSet+=s; 
     return s; 
    } 

    public String addLineSeperator() { 
     String lineSpace = "----------------------------------------"; 
     commandSet += lineSpace; 
     return lineSpace; 
    } 

    public void resetAll() { 
     commandSet = ""; 
    } 

    public void setText(String s) { 
     commandSet+=s; 
    } 

    public String finalCommandSet() { 
     return commandSet; 
    } 
} 

feedPrinter() - विधि

private static boolean feedPrinter(byte[] b) { 
    try {  
     AttributeSet attrSet = new HashPrintServiceAttributeSet(new PrinterName("EPSON TM-U220 ReceiptE4", null)); //EPSON TM-U220 ReceiptE4 

     DocPrintJob job = PrintServiceLookup.lookupPrintServices(null, attrSet)[0].createPrintJob();  
     //PrintServiceLookup.lookupDefaultPrintService().createPrintJob(); 

     DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; 
     Doc doc = new SimpleDoc(b, flavor, null); 
     PrintJobWatcher pjDone = new PrintJobWatcher(job); 

     job.print(doc, null); 
     pjDone.waitForDone(); 
     System.out.println("Done !"); 
    } catch (javax.print.PrintException pex) { 
     System.out.println("Printer Error " + pex.getMessage()); 
     return false; 
    } catch(Exception e) { 
     e.printStackTrace(); 
     return false; 
    } 
    return true; 
} 

अब एक बिल :)

PrinterOptions p=new PrinterOptions(); 

p.resetAll(); 
p.initialize(); 
p.feedBack((byte)2); 
p.color(0); 
p.alignCenter(); 
p.setText("The Dum Dum Name"); 
p.newLine(); 
p.setText("Restaurant Dining"); 
p.newLine(); 
p.addLineSeperator(); 
p.setText("Bling Bling"); 
p.newLine(); 
p.addLineSeperator(); 
p.newLine(); 

p.alignLeft(); 
p.setText("POD No \t: 2001 \tTable \t: E511"); 
p.newLine();    

p.setText("Res Date \t: " + "01/01/1801 22:59"); 

p.newLine(); 
p.setText("Session \t: Evening Session"); 
p.newLine(); 
p.setText("Staff \t: Bum Dale"); 
p.newLine(); 
p.addLineSeperator(); 
p.newLine(); 
p.alignCenter(); 
p.setText(" - Some Items - "); 
p.newLine(); 
p.alignLeft(); 
p.addLineSeperator(); 

p.newLine(); 

p.setText("No \tItem\t\tUnit\tQty"); 
p.newLine(); 
p.addLineSeperator(); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 
p.setText("1" + "\t" + "Aliens Everywhere" + "\t" + "Rats" + "\t" + "500"); 

p.addLineSeperator(); 
p.feed((byte)3); 
p.finit(); 

feedPrinter(p.finalCommandSet().getBytes()); 

Answer 2

तैयार

मुझे यह मिला:

Java Pos Thermal Printer Example

यह मेरे लिए काम किया। बाहरी पुस्तकालयों की कोई ज़रूरत नहीं है।

import java.awt.Font; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.print.PageFormat; 
import java.awt.print.Printable; 
import java.awt.print.PrinterException; 
import java.util.ArrayList; 
import java.util.List; 

import javax.print.Doc; 
import javax.print.DocFlavor; 
import javax.print.DocPrintJob; 
import javax.print.PrintService; 
import javax.print.PrintServiceLookup; 
import javax.print.SimpleDoc; 
import javax.print.attribute.HashPrintRequestAttributeSet; 
import javax.print.attribute.PrintRequestAttributeSet; 

public class PrinterService implements Printable { 

    public List<String> getPrinters(){ 

     DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; 
     PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); 

     PrintService printServices[] = PrintServiceLookup.lookupPrintServices(
       flavor, pras); 

     List<String> printerList = new ArrayList<String>(); 
     for(PrintService printerService: printServices){ 
      printerList.add(printerService.getName()); 
     } 

     return printerList; 
    } 

    @Override 
    public int print(Graphics g, PageFormat pf, int page) 
      throws PrinterException { 
     if (page > 0) { /* We have only one page, and 'page' is zero-based */ 
      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 
     */ 
     Graphics2D g2d = (Graphics2D) g; 
     g2d.translate(pf.getImageableX(), pf.getImageableY()); 
     /* Now we perform our rendering */ 

     g.setFont(new Font("Roman", 0, 8)); 
     g.drawString("Hello world !", 0, 10); 

     return PAGE_EXISTS; 
    } 

    public void printString(String printerName, String text) { 

     // find the printService of name printerName 
     DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; 
     PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); 

     PrintService printService[] = PrintServiceLookup.lookupPrintServices(
       flavor, pras); 
     PrintService service = findPrintService(printerName, printService); 

     DocPrintJob job = service.createPrintJob(); 

     try { 

      byte[] bytes; 

      // important for umlaut chars 
      bytes = text.getBytes("CP437"); 

      Doc doc = new SimpleDoc(bytes, flavor, null); 


      job.print(doc, null); 

     } catch (Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

    } 

    public void printBytes(String printerName, byte[] bytes) { 

     DocFlavor flavor = DocFlavor.BYTE_ARRAY.AUTOSENSE; 
     PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet(); 

     PrintService printService[] = PrintServiceLookup.lookupPrintServices(
       flavor, pras); 
     PrintService service = findPrintService(printerName, printService); 

     DocPrintJob job = service.createPrintJob(); 

     try { 

      Doc doc = new SimpleDoc(bytes, flavor, null); 

      job.print(doc, null); 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

    private PrintService findPrintService(String printerName, 
      PrintService[] services) { 
     for (PrintService service : services) { 
      if (service.getName().equalsIgnoreCase(printerName)) { 
       return service; 
      } 
     } 

     return null; 
    } 
} 

और मुख्य वर्ग:

public class Main { 

    public static void main(String[] args) { 

     PrinterService printerService = new PrinterService(); 

     System.out.println(printerService.getPrinters()); 

     //print some stuff. Change the printer name to your thermal printer name. 
     printerService.printString("EPSON-TM-T20II", "\n\n testing testing 1 2 3eeeee \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"); 

     // cut that paper! 
     byte[] cutP = new byte[] { 0x1d, 'V', 1 }; 

     printerService.printBytes("EPSON-TM-T20II", cutP); 

    } 

}