本文实例为大家分享了Java二维码生成与解码的具体代码,供大家参考,具体内容如下
一、添加Maven依赖(解码时需要上传二维码图片,所以需要依赖文件上传包)
<!-- google二维码工具 -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.1.0</version>
</dependency>
<!-- 文件上传 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
二、创建生成二维码接口(接口参数为二维码内容,通常是URL)
/**
* 生成二维码
* google zxing 实现
* @param text
* @return
*/
@RequestMapping(value = "/qrcode/encode", method = RequestMethod.POST)
public void encodeQrCode(String text, HttpServletResponse response) {
try {
// 设置二维码参数
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, 150, 150, hints);
//返回二维码
MatrixToImageWriter.writeToStream(bitMatrix, "jpg", response.getOutputStream());
} catch (Exception e) {
e.printStackTrace();
}
}
三、创建二维码解码接口(直接返回解码后的二维码内容)
/**
* 二维码图片解码
* google zxing 实现
* @param qrImg
* @return
*/
@RequestMapping(value = "/qrcode/decode", method = RequestMethod.POST)
public String decodeQrCode(MultipartFile qrImg) {
if (!qrImg.isEmpty()) {
try {
BufferedImage image = ImageIO.read(qrImg.getInputStream());
BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
// 定义二维码的参数:
HashMap<DecodeHintType, Object> hints = new HashMap<>();
// 定义字符集
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
Result result = new MultiFormatReader().decode(binaryBitmap, hints);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持天达云。