Java生成二维码可添加logo和文字功能

packagecom.luo.wctweb.util;

importjava.awt.Color;

importjava.awt.Font;

importjava.awt.Graphics2D;

importjava.awt.image.BufferedImage;

importjava.io.ByteArrayOutputStream;

importjava.io.File;

importjava.util.Date;

importjava.util.HashMap;

importjava.util.Map;

importjavax.imageio.ImageIO;

importjavax.servlet.http.HttpServletRequest;

importcom.google.zxing.BarcodeFormat;

importcom.google.zxing.EncodeHintType;

importcom.google.zxing.MultiFormatWriter;

importcom.google.zxing.WriterException;

importcom.google.zxing.common.BitMatrix;

importcom.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

importcom.lz.lsf.util.Base64;

/** * @Description: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */

publicclassZXingCode {

privatestaticfinalintQRCOLOR =0xFF000000;//默认是黑色

privatestaticfinalintBGWHITE =0xFFFFFFFF;//背景颜色

publicstaticvoidmain(String[] args)throwsWriterException

{

try

{

getLogoQRCode("https://www.baidu.com/",null,"跳转到百度的二维码");

}

catch(Exception e)

{

e.printStackTrace();

}

}

/** * 生成带logo的二维码图片 * * @param qrPic * @param logoPic */

publicstaticString getLogoQRCode(String qrUrl,HttpServletRequest request,String productName)

{

// String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";

//filePath是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好

String filePath ="C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg";//TODO

String content = qrUrl;

try

{

ZXingCode zp =newZXingCode();

BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE,400,400, zp.getDecodeHintType());

returnzp.addLogo_QRCode(bim,newFile(filePath),newLogoConfig(), productName);

}

catch(Exception e)

{

e.printStackTrace();

}

returnnull;

}

/** * 给二维码图片添加Logo * * @param qrPic * @param logoPic */

publicString addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)

{

try

{

/** * 读取二维码图片，并构建绘图对象 */

BufferedImage image = bim;

Graphics2D g = image.createGraphics();

/** * 读取Logo图片 */

BufferedImage logo = ImageIO.read(logoPic);

/** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */

intwidthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null),

heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);

/** * logo放在中心 */

intx = (image.getWidth() - widthLogo) /2;

inty = (image.getHeight() - heightLogo) /2;

/** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */

//开始绘制图片

g.drawImage(logo, x, y, widthLogo, heightLogo,null);

// g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);

// g.setStroke(new BasicStroke(logoConfig.getBorder()));

// g.setColor(logoConfig.getBorderColor());

// g.drawRect(x, y, widthLogo, heightLogo);

g.dispose();

//把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦

if(productName !=null&& !productName.equals("")) {

//新的图片，把带logo的二维码下面加上文字

BufferedImage outImage =newBufferedImage(400,445, BufferedImage.TYPE_4BYTE_ABGR);

Graphics2D outg = outImage.createGraphics();

//画二维码到新的面板

outg.drawImage(image,0,0, image.getWidth(), image.getHeight(),null);

//画文字到新的面板

outg.setColor(Color.BLACK);

outg.setFont(newFont("宋体",Font.BOLD,30));//字体、字型、字号

intstrWidth = outg.getFontMetrics().stringWidth(productName);

if(strWidth >399) {

// //长度过长就截取前面部分

// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字

//长度过长就换行

String productName1 = productName.substring(0, productName.length()/2);

String productName2 = productName.substring(productName.length()/2, productName.length());

intstrWidth1 = outg.getFontMetrics().stringWidth(productName1);

intstrWidth2 = outg.getFontMetrics().stringWidth(productName2);

outg.drawString(productName1,200- strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2+12);

BufferedImage outImage2 =newBufferedImage(400,485, BufferedImage.TYPE_4BYTE_ABGR);

Graphics2D outg2 = outImage2.createGraphics();

outg2.drawImage(outImage,0,0, outImage.getWidth(), outImage.getHeight(),null);

outg2.setColor(Color.BLACK);

outg2.setFont(newFont("宋体",Font.BOLD,30));//字体、字型、字号

outg2.drawString(productName2,200- strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2+5);

outg2.dispose();

outImage2.flush();

outImage = outImage2;

}else{

outg.drawString(productName,200- strWidth/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2+12);//画文字

}

outg.dispose();

outImage.flush();

image = outImage;

}

logo.flush();

image.flush();

ByteArrayOutputStream baos =newByteArrayOutputStream();

baos.flush();

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

//二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉

//可以看到这个方法最终返回的是这个二维码的imageBase64字符串

//前端用 其中${imageBase64QRCode}对应二维码的imageBase64字符串

ImageIO.write(image,"png",newFile("C:/Users/luoguohui/Desktop/TDC-"+newDate().getTime() +"test.png"));//TODO

String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());

baos.close();

returnimageBase64QRCode;

}

catch(Exception e)

{

e.printStackTrace();

}

returnnull;

}

/** * 构建初始化二维码 * * @param bm * @return */

publicBufferedImage fileToBufferedImage(BitMatrix bm)

{

BufferedImage image =null;

try

{

intw = bm.getWidth(), h = bm.getHeight();

image =newBufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

for(intx =0; x

{

for(inty =0; y

{

image.setRGB(x, y, bm.get(x, y) ?0xFF000000:0xFFCCDDEE);

}

}

}

catch(Exception e)

{

e.printStackTrace();

}

returnimage;

}

/** * 生成二维码bufferedImage图片 * * @param content * 编码内容 * @param barcodeFormat * 编码类型 * @param width * 图片宽度 * @param height * 图片高度 * @param hints * 设置参数 * @return */

publicBufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat,intwidth,intheight, Maphints)

{

MultiFormatWriter multiFormatWriter =null;

BitMatrix bm =null;

BufferedImage image =null;

try

{

multiFormatWriter =newMultiFormatWriter();

// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数

bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);

intw = bm.getWidth();

inth = bm.getHeight();

image =newBufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色

for(intx =0; x

{

for(inty =0; y

{

image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);

}

}

}

catch(WriterException e)

{

e.printStackTrace();

}

returnimage;

}

/** * 设置二维码的格式参数 * * @return */

publicMapgetDecodeHintType()

{

// 用于设置QR二维码参数

Maphints =newHashMap();

// 设置QR二维码的纠错级别（H为最高级别）具体级别信息

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

// 设置编码方式

hints.put(EncodeHintType.CHARACTER_SET,"utf-8");

hints.put(EncodeHintType.MARGIN,0);

hints.put(EncodeHintType.MAX_SIZE,350);

hints.put(EncodeHintType.MIN_SIZE,100);

returnhints;

}

}

classLogoConfig

{

// logo默认边框颜色

publicstaticfinalColor DEFAULT_BORDERCOLOR = Color.WHITE;

// logo默认边框宽度

publicstaticfinalintDEFAULT_BORDER =2;

// logo大小默认为照片的1/5

publicstaticfinalintDEFAULT_LOGOPART =5;

privatefinalintborder = DEFAULT_BORDER;

privatefinalColor borderColor;

privatefinalintlogoPart;

/** * Creates a default config with on color {@link #BLACK} and off color * {@link #WHITE}, generating normal black-on-white barcodes. */

publicLogoConfig()

{

this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);

}

publicLogoConfig(Color borderColor,intlogoPart)

{

this.borderColor = borderColor;

this.logoPart = logoPart;

}

publicColor getBorderColor()

{

returnborderColor;

}

publicintgetBorder()

{

returnborder;

}

publicintgetLogoPart()

{

returnlogoPart;

}

}