『壹』 怎麼把一串代碼變成二維碼
親，我寫了一段代碼可以供你參考：
public static void main(String[] args) {
String myCodeText = "http://Crunchify.com/";
String filePath = "/Users/appshah/Documents/eclipsewp/CrunchifyQR.png";
int size = 125;
String fileType = "png";
File myFile = new File(filePath);
try {
Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix byteMatrix = qrCodeWriter.encode(myCodeText,BarcodeFormat.QR_CODE, size, size, hintMap);
int CrunchifyWidth = byteMatrix.getWidth();
BufferedImage image = new BufferedImage(CrunchifyWidth, CrunchifyWidth,
BufferedImage.TYPE_INT_RGB);
image.createGraphics();
Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, CrunchifyWidth, CrunchifyWidth);
graphics.setColor(Color.BLACK);
for (int i = 0; i < CrunchifyWidth; i++) {
for (int j = 0; j < CrunchifyWidth; j++) {
if (byteMatrix.get(i, j)) {
graphics.fillRect(i, j, 1, 1);
}
}
}
ImageIO.write(image, fileType, myFile);
} catch (WriterException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("\n\nYou have successfully created QR Code.");
}
O(∩_∩)O~溫馨提示O(∩_∩)O~
真心希望你能採納我的回答，如有不明白，可以繼續追問，若滿意，記得及時採納。