一、导入jar包
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>
二、创建工具类
/**
* 生成二维码
* @param imgPath 保存地址
* @param imgType 图片格式
* @param content 隐藏内容
* @param size 高宽
* @throws Exception io异常等
*/
public static void generateImg(String imgPath,String imgType,String content,int size,String logoPath)throws Exception {
//配置二维码
Hashtable<EncodeHintType,Object> hint = new Hashtable<>();
//设置排错率
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//设置编码格式
hint.put(EncodeHintType.CHARACTER_SET,"utf-8");
//设置边距
hint.put(EncodeHintType.MARGIN,1);
//获取内容
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE,size,size,hint);
//内存画板
BufferedImage img = new BufferedImage(size,size,BufferedImage.TYPE_INT_RGB);
//如果没有logo地址那么二维码则不会有logo
for (int x=0;x<size;x++){
for (int j=0;j<size;j++){
//循环构建
img.setRGB(x,j,(bitMatrix.get(x,j)? 0xFF000000 :0xFFFFFFFF));
}
}
if(!"".equals(logoPath)&&null!=logoPath){
img = generateLogo(img,logoPath);
}
//创建图片文件流
File file = new File(imgPath);
//生成文件
ImageIO.write(img,imgType,file);
}
/**
* 生成logo
* @param img 二维码图片流
* @param logoPath logo图片地址
* @return
* @throws Exception
*/
private static BufferedImage generateLogo(BufferedImage img,String logoPath)throws Exception{
//将二维码加载到画板上(类似于背景壁纸)
Graphics2D graphics2D = img.createGraphics();
//将logo文件加载到内存
BufferedImage logoImg = ImageIO.read(new File(logoPath));
int height=img.getHeight();
int width=img.getWidth();
//绘制logo
graphics2D.drawImage(logoImg,width*2/5,height*2/5,width*1/5,height*1/5,null);
//创建一号画笔 用于绘制外边距内容
BasicStroke marginStrock = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
//将画笔与画板建立联系
graphics2D.setStroke(marginStrock);
//创建一个logo外边框(正方形)
RoundRectangle2D.Float marginRound = new RoundRectangle2D.Float(width*2/5,height*2/5,width*1/5,height*1/5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
//设置logo外边框颜色
graphics2D.setColor(Color.white);
//绘制logo外边框
graphics2D.draw(marginRound);
//创建二号画笔 用户绘制边框
BasicStroke borderStrock = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
//将画笔与画板建立联系
graphics2D.setStroke(borderStrock);
//创建一个logo边框(正方形)
RoundRectangle2D.Float borderRound = new RoundRectangle2D.Float(width*2/5+2,height*2/5+2,width*1/5-4,height*1/5-4,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
//设置logo边框颜色
graphics2D.setColor(Color.gray);
//绘制logo外边框
graphics2D.draw(borderRound);
//释放内存
graphics2D.dispose();
img.flush();
return img;
}
三、获取二维码内容
/**
* 解析二维码
* @param imgPath 二维码路径
* @return 解析的文件
*/
public static String readContent(String imgPath){
try {
File file=new File(imgPath);
BufferedImage img=ImageIO.read(file);
MultiFormatReader multiFormatReader=new MultiFormatReader();
LuminanceSource luminanceSource=new BufferedImageLuminanceSource(img);
Binarizer binarizer=new HybridBinarizer(luminanceSource);
BinaryBitmap binaryBitmap=new BinaryBitmap(binarizer);
Map map=new HashMap();
map.put(EncodeHintType.CHARACTER_SET,"utf-8");
Result result=multiFormatReader.decode(binaryBitmap,map);
return result.getText();
} catch (IOException e) {
e.printStackTrace();
} catch (NotFoundException e) {
e.printStackTrace();
}
return "";
}