将int []二进制数组转换为java中的图像。

Question

我有这样的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; 
} 
} 

它会产生一个Code38维条形码。它返回int [] bars数组。如何将该数组转换为条形码图像。我不想使用任何外部的罐子/库。

如果任何人有任何更好的想法来生成条形码图像，也将受到欢迎。

Answer 1

你可以试试下面的代码（以看main法）：

附：使线条更细，只需更改BARCODE_LINE_WIDTH变量。

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; 
    } 
} 

和结果图像（ “newimage.png”）：

Answer 2

您只需要使用BufferedImage和setRGB方法设置线性条像素。