Comment imprimer des chaînes avec des sauts de ligne en java
J'ai besoin d'imprimer une chaîne en Java afin de trouver la solution suivante. Après avoir recherché beaucoup de choses sur Google. J'ai apporté des modifications pour imprimer la chaîne sans afficher la boîte de dialogue Imprimer. Mon problème est que bien que cette méthode imprime correctement la chaîne, elle ne casse pas les lignes telles que je les ai définies. S'il vous plaît dites-moi comment imprimer des chaînes avec des sauts de ligne.
public class PrintBill implements Printable {
private static final String mText = "SHOP MA\n"
+ "----------------------------\n"
+ "Pannampitiya\n"
+ "09-10-2012 harsha no: 001\n"
+ "No Item Qty Price Amount\n"
+ "1 Bread 1 50.00 50.00\n"
+ "____________________________\n";
private static final AttributedString mStyledText = new AttributedString(mText);
static public void main(String args[]) throws PrinterException {
PrinterService ps = new PrinterService();
PrintService pss = ps.getCheckPrintService("Samsung-ML-2850D-2");//get the printer service by printer name
PrinterJob printerJob = PrinterJob.getPrinterJob();
printerJob.setPrintService(pss);
Book book = new Book();
book.append(new PrintBill(), new PageFormat());
printerJob.setPageable(book);
try {
printerJob.print();
System.out.println(printerJob.getPrintService().getName());
System.out.println("Print compleated..");
} catch (PrinterException exception) {
System.err.println("Printing error: " + exception);
exception.printStackTrace();
}
@Override
public int print(Graphics g, PageFormat format, int pageIndex) {
Graphics2D g2d = (Graphics2D) g;
g2d.translate(format.getImageableX(), format.getImageableY());
g2d.setPaint(Color.black);
Point2D.Float pen = new Point2D.Float();
AttributedCharacterIterator charIterator = mStyledText.getIterator();
LineBreakMeasurer measurer = new LineBreakMeasurer(charIterator, g2d.getFontRenderContext());
float wrappingWidth = (float) format.getImageableWidth();
while (measurer.getPosition() < charIterator.getEndIndex()) {
TextLayout layout = measurer.nextLayout(wrappingWidth);
pen.y += layout.getAscent();
float dx = layout.isLeftToRight() ? 0 : (wrappingWidth - layout.getAdvance());
layout.draw(g2d, pen.x + dx, pen.y);
pen.y += layout.getDescent() + layout.getLeading();
}
return Printable.PAGE_EXISTS;
}
}
service d'imprimante fournissant la classe
public class PrinterService {
public PrintService getCheckPrintService(String printerName) {
PrintService ps = null;
DocFlavor doc_flavor = DocFlavor.STRING.TEXT_PLAIN;
PrintRequestAttributeSet attr_set =
new HashPrintRequestAttributeSet();
attr_set.add(new Copies(1));
attr_set.add(Sides.ONE_SIDED);
PrintService[] service = PrintServiceLookup.lookupPrintServices(doc_flavor, attr_set);
for (int i = 0; i < service.length; i++) {
System.out.println(service[i].getName());
if (service[i].getName().equals(printerName)) {
ps = service[i];
}
}
return ps;
}
}
OK, finalement, j'ai trouvé une bonne solution pour mon travail d'impression de facture et cela fonctionne correctement pour moi.
Cette classe fournit le service d'impression
public class PrinterService {
public PrintService getCheckPrintService(String printerName) {
PrintService ps = null;
DocFlavor doc_flavor = DocFlavor.STRING.TEXT_PLAIN;
PrintRequestAttributeSet attr_set =
new HashPrintRequestAttributeSet();
attr_set.add(new Copies(1));
attr_set.add(Sides.ONE_SIDED);
PrintService[] service = PrintServiceLookup.lookupPrintServices(doc_flavor, attr_set);
for (int i = 0; i < service.length; i++) {
System.out.println(service[i].getName());
if (service[i].getName().equals(printerName)) {
ps = service[i];
}
}
return ps;
}
}
Cette classe montre la tâche d'impression de facture,
public class HelloWorldPrinter implements Printable {
@Override
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
if (pageIndex > 0) { /* We have only one page, and 'page' is zero-based */
return NO_SUCH_PAGE;
}
Graphics2D g2d = (Graphics2D) graphics;
g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
//the String to print in multiple lines
//writing a semicolon (;) at the end of each sentence
String mText = "SHOP MA;"
+ "Pannampitiya;"
+ "----------------------------;"
+ "09-10-2012 harsha no: 001 ;"
+ "No Item Qty Price Amount ;"
+ "----------------------------;"
+ "1 Bread 1 50.00 50.00 ;"
+ "----------------------------;";
//Prepare the rendering
//split the String by the semicolon character
String[] bill = mText.split(";");
int y = 15;
Font f = new Font(Font.SANS_SERIF, Font.PLAIN, 8);
graphics.setFont(f);
//draw each String in a separate line
for (int i = 0; i < bill.length; i++) {
graphics.drawString(bill[i], 5, y);
y = y + 15;
}
/* tell the caller that this page is part of the printed document */
return PAGE_EXISTS;
}
public void pp() throws PrinterException {
PrinterService ps = new PrinterService();
//get the printer service by printer name
PrintService pss = ps.getCheckPrintService("Deskjet-1000-J110-series-2");
PrinterJob job = PrinterJob.getPrinterJob();
job.setPrintService(pss);
job.setPrintable(this);
try {
job.print();
} catch (PrinterException ex) {
ex.printStackTrace();
}
}
public static void main(String[] args) {
HelloWorldPrinter hwp = new HelloWorldPrinter();
try {
hwp.pp();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Faire de cette façon: -
String newline = System.getProperty("line.separator");
private static final String mText = "SHOP MA" + newline +
+ "----------------------------" + newline +
+ "Pannampitiya" + newline +
+ "09-10-2012 harsha no: 001" + newline +
+ "No Item Qty Price Amount" + newline +
+ "1 Bread 1 50.00 50.00" + newline +
+ "____________________________" + newline;
private static final String mText = "SHOP MA" + "\n" +
+ "----------------------------" + "\n" +
+ "Pannampitiya" + newline +
+ "09-10-2012 harsha no: 001" + "\n" +
+ "No Item Qty Price Amount" + "\n" +
+ "1 Bread 1 50.00 50.00" + "\n" +
+ "____________________________" + "\n";
Cela devrait marcher.
String newline = System.getProperty("line.separator");
System.out.println("First line" + newline);
System.out.println("Second line" + newline);
System.out.println("Third line");
Vous pouvez essayer d'utiliser StringBuilder: -
final StringBuilder sb = new StringBuilder();
sb.append("SHOP MA\n");
sb.append("----------------------------\n");
sb.append("Pannampitiya\n");
sb.append("09-10-2012 harsha no: 001\n");
sb.append("No Item Qty Price Amount\n");
sb.append("1 Bread 1 50.00 50.00\n");
sb.append("____________________________\n");
// To use StringBuilder as String.. Use `toString()` method..
System.out.println(sb.toString());
Je pense que vous le rendez trop complexe. AttributedString est utilisé lorsque vous souhaitez stocker des attributs - dans un contexte d'impression. Mais vous stockez des données à l'intérieur de cela. AttributedString
Stockez simplement vos données dans un objet Document et transmettez des propriétés telles que Font, Bold, Italic dans AttributedString.
J'espère que cela vous sera utile Un tutoriel rapide Et Didacticiel approfondi