Java实现彩色二维码

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步骤:

1.导入google 的zxing.jar包
2.核心方法
//生成二维码的类库private static MultiFormatWriter mutiWriter = new MultiFormatWriter();/** * @Description: 生成一个彩色二维码 * @param content 二维码内容 * @param width 宽度 * @param height 高度 * @param path 二维码生成路径 * @author  * @date 2017年11月8日 */public static String encode(String content, int width, int height,String path) {    try {        String fileName = UUID.randomUUID()+".png";        File file = new File(path+"/"+fileName);        ImageIO.write(genBarcode(content, width, height),"png", file);        return fileName;    } catch (Exception e) {        e.printStackTrace();    }    return null;} /** * @Description:生成一个二维码 * @param content  内容 * @param width 宽 * @param height 高 * @return * @throws WriterException * @throws IOException  * @author  * @date 2017年12月25日 */private static BufferedImage genBarcode(String content, int width, int height) throws WriterException, IOException {    Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();    hint.put(EncodeHintType.CHARACTER_SET, "utf-8");    hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);    // 生成二维码    BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,width, height, hint);    int w = matrix.getWidth();      int h = matrix.getHeight();      int[] data = new int[w * h];     boolean flag1=true;    int stopx=0;    for (int y = 0; y < h; y++) {        for (int x = 0; x < w; x++) {            if(matrix.get(x, y)){                if(flag1){                  flag1=false;                }            }else{                if(flag1==false){                    stopx =x;                    break;                }            }        }         if(flag1==false)            break;    }     for (int y = 0; y < h; y++) {          for (int x = 0; x < w; x++) {              if(matrix.get(x, y)){                if((x<stopx)&&(y<stopx)){                    Color color = new Color(231, 144, 56);                    int colorInt = color.getRGB();                    data[y * width + x] =colorInt;                }else{                    int num1 = (int) (50 - (50.0 - 13.0)/ matrix.getHeight()* (y + 1));                    int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight()* (y + 1));                    int num3 = (int) (162 - (162.0 - 107.0)/ matrix.getHeight() * (y + 1));                    Color color = new Color(num1, num2, num3);                    int colorInt = color.getRGB();                    data[y * w + x] = colorInt;                }            }else{                data[y * w + x] = -1;//白色            }        }      }      BufferedImage image = new BufferedImage(width, height,            BufferedImage.TYPE_INT_RGB);    image.getRaster().setDataElements(0, 0, width, height, data);    return image;}
效果图
这里写图片描述
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