使用epson-tmt81打印的JAVA代码

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public class Test1{
    JTable jTable1;
    Test1(){
        String columns[] = new String[] {"Name","Quantity","Rate","Amount"};
        Object data[][]={
        {"PEN","10","5","50"},
        {"PENCIL","10","3","30"},
        {"KEYBOARD AND MOUSE","10","3","30"}
        };
        jTable1 = new JTable(new ExampleTableModel(data,columns));
    }
    public static void main(String h[]){
        Test1 t=new Test1();
        t.printThisBill();
    }
    public void printThisBill() {
        TableModel mod = jTable1.getModel();
        DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
        DateFormat timeFormat = new SimpleDateFormat("HH:mm");
        Date date = new Date();
        String Date = dateFormat.format(date);
        String Time = timeFormat.format(date);

        double tax=0,amt1=0;
        String Header = 
        "   ****Super Market****       \n"
        + "Date: "+Date+"     Time: "+Time+"\n"
        + "---------------------------------\n"
        + "Name          Qty    Rate     Amt\n"
        + "---------------------------------\n";
        String bill = Header;
        int i =0;
        do{
            String name =     ""+ mod.getValueAt(i, 0);
            String qty =      ""+mod.getValueAt(i, 1);
            String rate =     ""+mod.getValueAt(i, 2);
            String amount =   ""+mod.getValueAt(i, 3);  
            if(name.length() > 15){
                name = name.substring(0, 15)+"  ";
            }   
            rate = rate;
            //String items = name+"\t"+qty+"\t"+rate+"\t"+amount+"\n";
            String items = name+"\t"+qty+"\t"+rate+"\t"+amount+"\n";
            bill = bill+ items;
            amt1=Double.parseDouble(amount)+amt1;
            i++;
        }while(i <= mod.getRowCount()-1);

        String amt=    "\n \n \nTotal Amount = "+amt1+"\n"
        + "Tax ="+tax+ "\n"
        + "*********************************\n"
        + "Thank you. \n";
        bill = bill+amt;
        System.out.println(bill);
        printCard(bill);
        //dispose();
    }
    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);
        try {
            job.print();
        } catch (PrinterException e) {
            System.err.println(e.getMessage());
        }
    }   
}

我使用的是 EPSON TM-81 打印机。我尝试通过上面的 java 代码打印表数据，但它给了我一些错误。当我尝试运行此代码时，我收到消息“打印机不接受作业”。如果您有任何疑问，请发布

Answer 1

这是收据打印机。通常您无法使用 Java 打印 API 来打印该打印机。您可以测试使用Java文件i/o直接打印到打印机端口:

File windows_pr = new File("LPR:");

File linux_pr = new File("/dev/ttyS2");

或使用通用 ( http://en.wikipedia.org/wiki/JavaPOS ) 或供应商特定的 Java 库。