打印机作业仅从JTable打印一行。通过输入一行或多行仅获得一个输出：
public void invoice_job() {
try {
int rows=JTable.getRowCount();
for (int row = 0; row<rows; row++) {
Names = (String)JTable.getValueAt(row, 0);
Quanti = (String)JTable.getValueAt(row, 1);
Prices = (Double)JTable.getValueAt(row, 2);
String head = String.format("%30s\n\n", " Invoice Reciept ");
String s = String.format("%-15s %5s %10s\n", "Item", "Qty", "Price");
String s1 = String.format("%-15s %5s %10s\n","---------","--------"," ----------");
String line = String.format("%-15s %5s %10.2f\n",Names,Quanti,Prices);
String lin2 = String.format("%-15s\n","-------------------------------------");
String Total = String.format("%37s\n","Total");
String total = String.format("%37s\n\n",lbl.getText());
String footer = String.format("%-15s\n", "Meridon sweets and bakers\nSince 1987\nPoint of sale system\nPowered by msofttech\nwww.msofttech.net");
String output = head + s + s1 + line + lin2 + Total + total + footer;
textPane.setText(output);
textPane.setText(output);
textPane.setText(output);
textPane.setText(output);
JOptionPane.showMessageDialog(null, output);
}
PrinterJob printerJob = PrinterJob.getPrinterJob();
PageFormat pageFormat = printerJob.defaultPage();
Paper paper = new Paper();
paper.setSize(180.0, (double) (paper.getHeight() + rows * 10.0));
paper.setImageableArea(rows, rows, paper.getWidth() - rows * 2,
paper.getHeight() - rows * 2);
pageFormat.setPaper(paper);
pageFormat.setOrientation(PageFormat.PORTRAIT);
printerJob.setPrintable(textPane.getPrintable(null, null), pageFormat);
printerJob.print();
}
catch (Exception e) {
e.printStackTrace();
}
输入：
输入是2项目。
输出：
输出仅是一项。
最佳答案
请尝试以下代码：
public void invoice_job()
{
try
{
int rows=JTable.getRowCount();
String head = String.format("%30s\n\n", " Invoice Reciept ");
String s = String.format("%-15s %5s %10s\n", "Item", "Qty", "Price");
String s1 = String.format("%-15s %5s %10s\n","---------","--------"," ----------");
String output = head + s + s1;
for(int row = 0; row<rows; row++)
{
String Names = (String)JTable.getValueAt(row, 0);
String Quanti = (String)JTable.getValueAt(row, 1);
String Prices = (Double)JTable.getValueAt(row, 2);
String line = String.format("%-15s %5s %10.2f\n",Names,Quanti,Prices);
output += line;
String lin2 = String.format("%-15s\n","-------------------------------------");
output += lin2;
}
String Total = String.format("%37s\n","Total");
String total = String.format("%37s\n\n",lbl.getText());
String footer = String.format("%-15s\n", "Meridon sweets and bakers\nSince 1987\nPoint of sale system\nPowered by msofttech\nwww.msofttech.net");
output += Total + total + footer;
textPane.setText(output);
JOptionPane.showMessageDialog(null, output);
PrinterJob printerJob = PrinterJob.getPrinterJob();
PageFormat pageFormat = printerJob.defaultPage();
Paper paper = new Paper();
paper.setSize(180.0, (double) (paper.getHeight() + rows * 10.0));
paper.setImageableArea(rows, rows, paper.getWidth() - rows * 2, paper.getHeight() - rows * 2);
pageFormat.setPaper(paper);
pageFormat.setOrientation(PageFormat.PORTRAIT);
printerJob.setPrintable(textPane.getPrintable(null, null), pageFormat);
printerJob.print();
}
catch ( Exception e )
{
e.printStackTrace();
}
}
您需要为文本窗格的每一行添加一行。
关于java - Java Swing发票String.format仅返回(){}值到JTextPane吗？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37485648/