有谁知道如何将图像（例如 *.bmp 文件）转换为 java 中的 HEX 字符串，所以 HEX 字符串可以在 ^DG 命令（zpl 中的命令之一）中使用。谢谢！
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2 回答
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我写了一个可以做到这一点的java示例。您还可以创建 ascii 十六进制代码或压缩的 ZPL 代码并选择黑度百分比以提高准确性。
相应地更改 main 方法中的参数。有关更广泛的解释 here
*要测试结果而不打印，请在此处输入
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
public class ZPLConveter {
private int blackLimit = 380;
private int total;
private int widthBytes;
private boolean compressHex = false;
private static Map<Integer, String> mapCode = new HashMap<Integer, String>();
{
mapCode.put(1, "G");
mapCode.put(2, "H");
mapCode.put(3, "I");
mapCode.put(4, "J");
mapCode.put(5, "K");
mapCode.put(6, "L");
mapCode.put(7, "M");
mapCode.put(8, "N");
mapCode.put(9, "O");
mapCode.put(10, "P");
mapCode.put(11, "Q");
mapCode.put(12, "R");
mapCode.put(13, "S");
mapCode.put(14, "T");
mapCode.put(15, "U");
mapCode.put(16, "V");
mapCode.put(17, "W");
mapCode.put(18, "X");
mapCode.put(19, "Y");
mapCode.put(20, "g");
mapCode.put(40, "h");
mapCode.put(60, "i");
mapCode.put(80, "j");
mapCode.put(100, "k");
mapCode.put(120, "l");
mapCode.put(140, "m");
mapCode.put(160, "n");
mapCode.put(180, "o");
mapCode.put(200, "p");
mapCode.put(220, "q");
mapCode.put(240, "r");
mapCode.put(260, "s");
mapCode.put(280, "t");
mapCode.put(300, "u");
mapCode.put(320, "v");
mapCode.put(340, "w");
mapCode.put(360, "x");
mapCode.put(380, "y");
mapCode.put(400, "z");
}
public String convertfromImg(BufferedImage image) throws IOException {
String body = createBody(image);
if(compressHex)
body = encodeHexAscii(body);
return headDoc() + body + footDoc();
}
private String createBody(BufferedImage orginalImage) throws IOException {
StringBuffer sb = new StringBuffer();
Graphics2D graphics = orginalImage.createGraphics();
graphics.drawImage(orginalImage, 0, 0, null);
int height = orginalImage.getHeight();
int width = orginalImage.getWidth();
int rgb, red, green, blue, index=0;
char auxBinaryChar[] = {'0', '0', '0', '0', '0', '0', '0', '0'};
widthBytes = width/8;
if(width%8>0){
widthBytes= (((int)(width/8))+1);
} else {
widthBytes= width/8;
}
this.total = widthBytes*height;
for (int h = 0; h<height; h++)
{
for (int w = 0; w<width; w++)
{
rgb = orginalImage.getRGB(w, h);
red = (rgb >> 16 ) & 0x000000FF;
green = (rgb >> 8 ) & 0x000000FF;
blue = (rgb) & 0x000000FF;
char auxChar = '1';
int totalColor = red + green + blue;
if(totalColor>blackLimit){
auxChar = '0';
}
auxBinaryChar[index] = auxChar;
index++;
if(index==8 || w==(width-1)){
sb.append(fourByteBinary(new String(auxBinaryChar)));
auxBinaryChar = new char[]{'0', '0', '0', '0', '0', '0', '0', '0'};
index=0;
}
}
sb.append("\n");
}
return sb.toString();
}
private String fourByteBinary(String binaryStr){
int decimal = Integer.parseInt(binaryStr,2);
if (decimal>15){
return Integer.toString(decimal,16).toUpperCase();
} else {
return "0" + Integer.toString(decimal,16).toUpperCase();
}
}
private String encodeHexAscii(String code){
int maxlinea = widthBytes * 2;
StringBuffer sbCode = new StringBuffer();
StringBuffer sbLinea = new StringBuffer();
String previousLine = null;
int counter = 1;
char aux = code.charAt(0);
boolean firstChar = false;
for(int i = 1; i< code.length(); i++ ){
if(firstChar){
aux = code.charAt(i);
firstChar = false;
continue;
}
if(code.charAt(i)=='\n'){
if(counter>=maxlinea && aux=='0'){
sbLinea.append(",");
} else if(counter>=maxlinea && aux=='F'){
sbLinea.append("!");
} else if (counter>20){
int multi20 = (counter/20)*20;
int resto20 = (counter%20);
sbLinea.append(mapCode.get(multi20));
if(resto20!=0){
sbLinea.append(mapCode.get(resto20) + aux);
} else {
sbLinea.append(aux);
}
} else {
sbLinea.append(mapCode.get(counter) + aux);
if(mapCode.get(counter)==null){
}
}
counter = 1;
firstChar = true;
if(sbLinea.toString().equals(previousLine)){
sbCode.append(":");
} else {
sbCode.append(sbLinea.toString());
}
previousLine = sbLinea.toString();
sbLinea.setLength(0);
continue;
}
if(aux == code.charAt(i)){
counter++;
} else {
if(counter>20){
int multi20 = (counter/20)*20;
int mod20 = (counter%20);
sbLinea.append(mapCode.get(multi20));
if(mod20!=0){
sbLinea.append(mapCode.get(mod20) + aux);
} else {
sbLinea.append(aux);
}
} else {
sbLinea.append(mapCode.get(counter) + aux);
}
counter = 1;
aux = code.charAt(i);
}
}
return sbCode.toString();
}
private String headDoc(){
String str = "^XA " +
"^FO0,0^GFA,"+ total + ","+ total + "," + widthBytes +", ";
return str;
}
private String footDoc(){
String str = "^FS"+
"^XZ";
return str;
}
public void setCompressHex(boolean compressHex) {
this.compressHex = compressHex;
}
public void setBlacknessLimitPercentage(int percentage){
blackLimit = (percentage * 768 / 100);
}
public static void main(String[] args) throws Exception {
BufferedImage orginalImage = ImageIO.read(new File("/tmp/logo.jpg"));
ZPLConveter zp = new ZPLConveter();
zp.setCompressHex(true);
zp.setBlacknessLimitPercentage(50);
System.out.println(zp.convertfromImg(orginalImage));
}
}
于 2016-10-11T11:19:10.280 回答
-1
这是不容易的。您必须将图像转换为每像素 1 位 b/w，然后计算包含每行字节数的大小，然后正确形成~DG命令的参数来存储它。
或者...
Zebra 提供了将图像转换为 GRF（Zebra 内部图像类型）的 API。包中有一堆开发者演示，包括一个关于如何在打印机上打印/存储图像作为 GRF 的演示
希望这可以帮助
于 2013-03-01T18:17:21.153 回答