当我使用code128生成一个条形码并将其保存在一个PNG文件中时，我面临着这样的问题：当我将同一个PNG文件提供给打印机作业时，当它具有所需的文档属性以打印在所需尺寸的标签上时，它的尺寸被缩小了，并且没有被扫描。
实际打印尺寸 - 40mm x 15mm。打印在标签上的尺寸 - 20mm x 10mm。
我在PrintRequestAttributeSet中添加了这个属性--pras.add(MediaSize.findMedia(40, 15, Size2DSyntax.MM))。
但是效果并不准确，我试着在那里玩了一下x和y参数值，打印的尺寸还是落在25mm×10mm之内。
我已经在下面给出了完整的代码细节。
(PS:我使用 "Honeywell PC42t Plus "热敏打印机来打印，目前我的标签是700mm x 280mm大小，我正在等待收到40mm x 15mm大小的实际标签，所以这是为了测试，我可以打印一个实际的40mm x 15mm的条形码，利用整个标签空间，一旦我收到实际标签)
public class One_TestMyBarcode {
private static final String MIME_TYPE = "image/x-png";
private static final String DELIMTER = "-";
static String image_name = "NewBarcode_One.png";
public static void main(String[] args) {
FileInputStream textStream = null;
int lastSeqNo = 001;
String roCode= "ERO";
AtomicInteger seqNo = new AtomicInteger(lastSeqNo);
Code128Bean code128 = new Code128Bean();
code128.setHeight(15f);
//code128.setBarHeight(40f);
//code128.setModuleWidth(0.3);
code128.setModuleWidth(0.2);
code128.setQuietZone(10);
code128.doQuietZone(true);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BitmapCanvasProvider canvas = new BitmapCanvasProvider(baos, MIME_TYPE, 300, BufferedImage.TYPE_BYTE_BINARY,
false, 0);
StringBuffer codeData = new StringBuffer();
codeData.append(roCode);
codeData.append(DELIMTER);
int currentSeqNo = seqNo.getAndIncrement();
String seq = String.format("%07d", currentSeqNo);
codeData.append(seq);
codeData.append(DELIMTER);
Calendar current = Calendar.getInstance();
String year = Integer.toString(current.get(Calendar.YEAR)).substring(2);
codeData.append(year);
//logger.debug("barcode dimension is ");
code128.calcDimensions(codeData.toString());
code128.generateBarcode(canvas, codeData.toString());
try {
canvas.finish();
} catch (IOException e) {
throw new RuntimeException(e);
}
FileOutputStream fos = null;
try {
//fos = new FileOutputStream("C:\\Users\\Vinayak\\Desktop\\barcode\\" +image_name);
fos = new FileOutputStream(image_name);
fos.write(baos.toByteArray());
fos.flush();
fos.close();
//textStream = new FileInputStream("C:\\Users\\Vinayak\\Desktop\\barcode\\" +image_name);
textStream = new FileInputStream(image_name);
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
DocFlavor flavor = DocFlavor.INPUT_STREAM.PNG;
// Position the default print service
PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
// Create a print job
DocPrintJob job = printService.createPrintJob();
// Set the print properties
PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
//printed a very small size (20mm x 10mm) and does not scan
pras.add(MediaSize.findMedia(40, 15, Size2DSyntax.MM));
//DOESN'T Scan Either
//pras.add(OrientationRequested.LANDSCAPE);
//pras.add(OrientationRequested.PORTRAIT);
//pras.add(MediaSizeName.ISO_A10);
//Doesn't print at all
//pras.add(new MediaPrintableArea(0, 0, 40, 15, MediaPrintableArea.MM));
pras.add(new Copies(1));
DocAttributeSet das = new HashDocAttributeSet();
// Specify print content
Doc doc = new SimpleDoc(textStream, flavor, das);
// Do not display the print dialog, print directly
try {
System.err.println("Loop - print");
job.print(doc, pras); // Make specific print operations for each page
} catch (PrintException pe) {
pe.printStackTrace();
}
}
}
你可以使你的程序更短、更快，也可以确保它总是打印的是一个文件。可读 条形码，通过使用打印机语言，而不是像使用通用打印机一样使用条形码打印机。
import javax.print.*;
public class PrintUsingZPL {
public static void main(String[] args) {
StringBuilder codeData = new StringBuilder();
codeData.append("Stackoverflow"); // example
String printCommand = "^XA^LH0,0^FO50,50^BCN,100,Y,N,N^FD"+
codeData.toString()+
"^FS^XZ";
PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
try {
DocPrintJob job = printService.createPrintJob();
Doc doc = new SimpleDoc(printCommand.getBytes(), DocFlavor.BYTE_ARRAY.AUTOSENSE, null);
job.print(doc, null);
}
catch(PrintException e) { /* error handling goes here */ }
}
}
谢谢@Erich。我已经使用了您给出的代码，并更新了ZPL和DP语言的printCommand，您更新的代码（^LH）能够打印条码，但它没有被扫描。您更新的代码(^LH)能够打印条码，但它没有被扫描(不确定，我尝试了一些变化，但没有帮助)，所以我尝试DPL命令，如这里的代码所示，它能够打印条码并成功地被扫描。非常感谢您的帮助和指导。
package BARCODE;
import javax.print.*;
import javax.print.PrintService;
public class PrintUsingZPL1 {
public static void main(String[] args) {
StringBuilder codeData = new StringBuilder();
//codeData.append("Stackoverflow"); // example
codeData.append("CRO-0000100-20"); // example
String printData = codeData.toString();
System.out.println("Data for Barcode " +printData);
/*String printCommand = "^XA^LH0,0^FO50,50^BCN,100,Y,N,N^FD"+
codeData.toString()+
"^FS^XZ";*/
/* String printCommand = "PP65,107:AN7\r\n" +
"BARSET \"CODE128B\",2,1,1,71\r\n" +
"PB \"CRO-0000001-20\"\r\n" +
"PP79,37:NASC 8\r\n" +
"FT \"CG Triumvirate Condensed Bold\",8,0,98\r\n" +
"PT \"CRO-0000001-20\"\r\n" +
"LAYOUT RUN \"\"\r\n" +
"PF"; */
String printCommand = "PP35,90:AN7\r\n" +
"BARSET \"CODE39A\",3,1,1,67\r\n" +
"PB " +codeData.toString()+ "\r\n" +
"PP65,23:NASC 9\r\n" +
"FT \"Andale Mono Bold\",8,0\r\n" +
"PT " +codeData.toString()+ "\r\n" +
"LAYOUT RUN \"\"\r\n" +
"PF";
/*String printCommand = "PP65,107:AN7\r\n" +
"BARSET \"CODE128B\",2,1,1,71\r\n" +
"PB "+printData+"\r\n" +
"PP79,37:NASC 8\r\n" +
"FT \"CG Triumvirate Condensed Bold\",8,0,98\r\n" +
"PT "+printData+"\r\n" +
"LAYOUT RUN \"\"\r\n" +
"PF";*/
PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
try {
DocPrintJob job = printService.createPrintJob();
Doc doc = new SimpleDoc(printCommand.getBytes(), DocFlavor.BYTE_ARRAY.AUTOSENSE, null);
job.print(doc, null);
}
catch(PrintException e) { /* error handling goes here */ }
}
}