esp-pos列印圖片和二維碼
阿新 • • 發佈：2019-02-17
ByteArrayOutputStream buffer = new ByteArrayOutputStream();data[0] = 0x1D;data[1] = 0x76;data[2] = 0x30;data[3] = 0x00;data[4] = (byte) w;// xLdata[5] = (byte) (w >> 8);// xHdata[6] = (byte) h;data[7] = (byte) (h >> 8);int k = targetBmp.getWidth() * targetBmp.getHeight();int[] pixels = new int[k];targetBmp.getPixels(pixels
buffer.write(data);
byte[] n1 = new byte[]{29, 104, 55}; byte[] n2 = new byte[]{29, 119, 2}; byte[] n3 = new byte[orderNumberStr.length()]; int i = 0; while (i * 2 < orderNumberStr.length()) { n3[i] = Byte.valueOf(Byte.parseByte(orderNumberStr.substring(i * 2, i * 2 + 2))).byteValue(); i += 1; } byte[] n5 = new byte[]{29, 107, 73, 14, 123, 67};
buffer.write("退款碼".getBytes("gbk"));buffer.write(n1);buffer.write(n2);buffer.write(n5);buffer.write(n3);
outputStream.write(buffer.toByteArray());//寫入
public boolean isIPv4Address(final String input) { Pattern IPV4_PATTERN = Pattern.compile("^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][09-]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$"); return IPV4_PATTERN.matcher(input).matches(); }