[英]Convert int[] binary array to image in java.
I have this java class: 我有这个java类:
import java.util.HashMap;
public class Code39 implements LinearBarcode {
private String code;
private int[] bars;
public Code39(String code) {
this.code = code.toUpperCase().trim();
bars = new int[(code.length() + 2) * 12];
this.buildSequence();
}
@Override
public void buildSequence() {
String encoded = "*" + code + "*";
int p = 0;
for (int i = 0; i < encoded.length(); i++) {
int[] sequence = mapSequence(encoded.charAt(i), i);
System.arraycopy(sequence, 0, bars, p, sequence.length);
p += sequence.length;
}
}
@Override
public int[] mapSequence(char c, int pos) {
HashMap<Character, int[]> sequence = new HashMap<Character, int[]>();
sequence.put('0', new int[]{1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1});
sequence.put('1', new int[]{1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1});
sequence.put('2', new int[]{1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1});
sequence.put('3', new int[]{1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1});
sequence.put('4', new int[]{1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1});
sequence.put('5', new int[]{1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1});
sequence.put('6', new int[]{1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1});
sequence.put('7', new int[]{1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1});
sequence.put('8', new int[]{1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1});
sequence.put('9', new int[]{1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1});
sequence.put('A', new int[]{1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1});
sequence.put('B', new int[]{1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1});
sequence.put('C', new int[]{1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1});
sequence.put('D', new int[]{1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1});
sequence.put('E', new int[]{1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1});
sequence.put('F', new int[]{1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1});
sequence.put('G', new int[]{1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1});
sequence.put('H', new int[]{1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1});
sequence.put('I', new int[]{1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1});
sequence.put('J', new int[]{1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1});
sequence.put('K', new int[]{1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1});
sequence.put('L', new int[]{1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1});
sequence.put('M', new int[]{1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1});
sequence.put('N', new int[]{1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1});
sequence.put('O', new int[]{1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1});
sequence.put('P', new int[]{1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1});
sequence.put('Q', new int[]{1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1});
sequence.put('R', new int[]{1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1});
sequence.put('S', new int[]{1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1});
sequence.put('T', new int[]{1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1});
sequence.put('U', new int[]{1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1});
sequence.put('V', new int[]{1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1});
sequence.put('W', new int[]{1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1});
sequence.put('X', new int[]{1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1});
sequence.put('Y', new int[]{1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1});
sequence.put('Z', new int[]{1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1});
sequence.put('-', new int[]{1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1});
sequence.put('.', new int[]{1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1});
sequence.put(' ', new int[]{1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1});
sequence.put('$', new int[]{1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1});
sequence.put('/', new int[]{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1});
sequence.put('+', new int[]{1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1});
sequence.put('%', new int[]{1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1});
sequence.put('*', new int[]{1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1});
return sequence.get(c);
}
@Override
public int[] barcode() {
return bars;
}
@Override
public String code() {
return code;
}
@Override
public int calculateCheckDigit() {
return 0;
}
}
It generates a Code38 Linear Barcode. 它生成一个Code38线性条形码。 It returns the int[] bars array. 它返回int [] bars数组。 How do I convert that array into a barcode image. 如何将阵列转换为条形码图像。 I don't want to use any external jars/libs. 我不想使用任何外部jar / lib。
If anyone has any better ideas for generating barcode images that would also be welcomed. 如果有人对生成条形码图像有更好的想法,那也将受到欢迎。
You can try the following code (take look at main
method): 您可以尝试以下代码(看一下main
方法):
PS to make lines slimmer just change BARCODE_LINE_WIDTH
variable. PS使线条更细,只需更改BARCODE_LINE_WIDTH
变量即可。
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
public class Code39 {
private static final int BARCODE_LINE_WIDTH = 5;
private static final int BARCODE_HEIGHT = 100;
public static void main(String[] args) throws IOException {
Code39 code39 = new Code39("123456789");
int[] barcode = code39.barcode();
int width = BARCODE_LINE_WIDTH * barcode.length;
int height = BARCODE_HEIGHT;
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = bufferedImage.createGraphics();
for (int i = 0; i < barcode.length; i++) {
if (barcode[i] == 0) {
g2d.setColor(Color.WHITE);
} else {
g2d.setColor(Color.BLACK);
}
g2d.fillRect(i * BARCODE_LINE_WIDTH, 0, BARCODE_LINE_WIDTH, height);
}
g2d.dispose();
RenderedImage rendImage = bufferedImage;
File file = new File("newimage.png");
ImageIO.write(rendImage, "png", file);
}
private String code;
private int[] bars;
public Code39(String code) {
this.code = code.toUpperCase().trim();
bars = new int[(code.length() + 2) * 12];
this.buildSequence();
}
public void buildSequence() {
String encoded = "*" + code + "*";
int p = 0;
for (int i = 0; i < encoded.length(); i++) {
int[] sequence = mapSequence(encoded.charAt(i), i);
System.arraycopy(sequence, 0, bars, p, sequence.length);
p += sequence.length;
}
}
public int[] mapSequence(char c, int pos) {
HashMap<Character, int[]> sequence = new HashMap<Character, int[]>();
sequence.put('0', new int[]{1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1});
sequence.put('1', new int[]{1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1});
sequence.put('2', new int[]{1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1});
sequence.put('3', new int[]{1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1});
sequence.put('4', new int[]{1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1});
sequence.put('5', new int[]{1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1});
sequence.put('6', new int[]{1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1});
sequence.put('7', new int[]{1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1});
sequence.put('8', new int[]{1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1});
sequence.put('9', new int[]{1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1});
sequence.put('A', new int[]{1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1});
sequence.put('B', new int[]{1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1});
sequence.put('C', new int[]{1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1});
sequence.put('D', new int[]{1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1});
sequence.put('E', new int[]{1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1});
sequence.put('F', new int[]{1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1});
sequence.put('G', new int[]{1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1});
sequence.put('H', new int[]{1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1});
sequence.put('I', new int[]{1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1});
sequence.put('J', new int[]{1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1});
sequence.put('K', new int[]{1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1});
sequence.put('L', new int[]{1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1});
sequence.put('M', new int[]{1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1});
sequence.put('N', new int[]{1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1});
sequence.put('O', new int[]{1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1});
sequence.put('P', new int[]{1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1});
sequence.put('Q', new int[]{1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1});
sequence.put('R', new int[]{1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1});
sequence.put('S', new int[]{1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1});
sequence.put('T', new int[]{1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1});
sequence.put('U', new int[]{1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1});
sequence.put('V', new int[]{1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1});
sequence.put('W', new int[]{1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1});
sequence.put('X', new int[]{1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1});
sequence.put('Y', new int[]{1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1});
sequence.put('Z', new int[]{1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1});
sequence.put('-', new int[]{1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1});
sequence.put('.', new int[]{1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1});
sequence.put(' ', new int[]{1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1});
sequence.put('$', new int[]{1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1});
sequence.put('/', new int[]{1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1});
sequence.put('+', new int[]{1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1});
sequence.put('%', new int[]{1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1});
sequence.put('*', new int[]{1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1});
return sequence.get(c);
}
public int[] barcode() {
return bars;
}
public String code() {
return code;
}
public int calculateCheckDigit() {
return 0;
}
}
And the result image("newimage.png"): 结果图像(“ newimage.png”):
您所要做的就是使用BufferedImage和setRGB
方法设置线性条形像素。
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