public static String encodeToBase64(String content){

MultiFormatWriter multiFormatWriter = new MultiFormatWriter();

Map hints = new HashMap();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); //设置字符集编码类型

BitMatrix bitMatrix = null;

try {

bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 300, 300,hints);

BufferedImage image = toBufferedImage(bitMatrix);

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

//输出二维码图片流

try {

ImageIO.write(image, "png",outputStream);

return Base64.encodeBase64String(outputStream.toByteArray());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} catch (WriterException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

return null;

}

 

基础转换

 

public void putImage(String key, Image image) throws IOException {

// Image->bufferreImage

BufferedImage bimg = new BufferedImage(image.getWidth(null),

image.getHeight(null), BufferedImage.TYPE_INT_RGB);

Graphics g = bimg.createGraphics();

g.drawImage(image, 0, 0, null);

g.dispose();

// bufferImage->base64

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

ImageIO.write(bimg, "jpg", outputStream);

BASE64Encoder encoder = new BASE64Encoder();

String base64Img = encoder.encode(outputStream.toByteArray());

// 输出

this.content = this.content.replace("@{" + key + "}",

"<img src= \"data:image/png;base64," + base64Img + "\"/>");

}

public void putImage(String key, Image image, int width, int height)

throws IOException {

// Image->bufferreImage

BufferedImage bimg = new BufferedImage(image.getWidth(null),

image.getHeight(null), BufferedImage.TYPE_INT_RGB);

Graphics g = bimg.createGraphics();

g.drawImage(image, 0, 0, null);

g.dispose();

// bufferImage->base64

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

ImageIO.write(bimg, "jpg", outputStream);

BASE64Encoder encoder = new BASE64Encoder();

String base64Img = encoder.encode(outputStream.toByteArray());

this.content = this.content.replace("@{" + key + "}",

"<img src= \"data:image/png;base64," + base64Img

+ "\" width=\"" + width + "\" height=\"" + height

+ "\"/>");

}