java生成带logo的二维码
package com.xxx.xx.x.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import org.apache.commons.codec.binary.Base64;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* @类描述：(生成带logo的二维码)
*/
public class ZXingCode {
private static final int QRCOLOR = 0xFF000000; // 默认是黑色
private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色
public static void main(String[] args) throws WriterException {
/// String filePath = (javax.servlet.http.HttpServletRequest)request.getSession().getServletContext().getRealPath("/") + "resources/images/hylogo.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 outputPath ="C:/Users/admin/Desktop/TDC-" + new Date().getTime() + "test.png";
String filePath = "C:\\Users\\admin\\Desktop\\hylogo.png"; // TODO
String comtent = "http://weixin.qq.com/r/MSncxPHEoazerbWn93wj";
try {
getLogoQRCode(comtent, "",filePath,outputPath);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 生成带logo的二维码图片
*
* @param qrPic
* @param logoPic
*/
public static String getLogoQRCode(String qrUrl, String productName,String filePath,String outputPath) {
String content = qrUrl;
try {
ZXingCode zp = new ZXingCode();
BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 150, 150,
zp.getDecodeHintType());
return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName,outputPath);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 给二维码图片添加Logo
*
* @param qrPic
* @param logoPic
*/
public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName,String outputPath) {
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
*/
int widthLogo = 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
*/
int x = (image.getWidth() - widthLogo) / 2;
int y = (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 = new BufferedImage(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(new Font("宋体", Font.BOLD, 30)); // 字体、字型、字号
int strWidth = 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());
int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
outg.drawString(productName1, 200 - strWidth1 / 2,
image.getHeight() + (outImage.getHeight() - image.getHeight()) / 2 + 12);
BufferedImage outImage2 = new BufferedImage(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(new Font("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 = new ByteArrayOutputStream();
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 <img src="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}对应二维码的imageBase64字符串
File tifjpgFile = new File(outputPath);
ImageIO.write(image, "png",
new File(outputPath)); // TODO
String imageBase64QRCode = Base64.encodeBase64URLSafeString(baos.toByteArray());
baos.close();
return imageBase64QRCode;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 构建初始化二维码
*
* @param bm
* @return
*/
public BufferedImage fileToBufferedImage(BitMatrix bm) {
BufferedImage image = null;
try {
int w = bm.getWidth(), h = bm.getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return image;
}
/**
* 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
*/
public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height,
Map<EncodeHintType, ?> hints) {
MultiFormatWriter multiFormatWriter = null;
BitMatrix bm = null;
BufferedImage image = null;
try {
multiFormatWriter = new MultiFormatWriter();
// 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);
int w = bm.getWidth();
int h = bm.getHeight();
image = new BufferedImage(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 (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
}
}
} catch (WriterException e) {
e.printStackTrace();
}
return image;
}
/**
* 设置二维码的格式参数
*
* @return
*/
public Map<EncodeHintType, Object> getDecodeHintType() {
// 用于设置QR二维码参数
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
// 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);
return hints;
}
}
class LogoConfig {
// logo默认边框颜色
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo默认边框宽度
public static final int DEFAULT_BORDER = 2;
// logo大小默认为照片的1/5
public static final int DEFAULT_LOGOPART = 5;
private final int border = DEFAULT_BORDER;
private final Color borderColor;
private final int logoPart;
/**
* Creates a default config with on color {@link #BLACK} and off color
* {@link #WHITE}, generating normal black-on-white barcodes.
*/
public LogoConfig() {
this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
}
public LogoConfig(Color borderColor, int logoPart) {
this.borderColor = borderColor;
this.logoPart = logoPart;
}
public Color getBorderColor() {
return borderColor;
}
public int getBorder() {
return border;
}
public int getLogoPart() {
return logoPart;
}
}
//外部调用部分
String content = "二维码内容";
String filePath = request.getRealPath("/")+"/resources/images/logo.png";; //logo存放的地址
String outputPath = request.getRealPath("/")+"resources/qrcode/ht"+uuid+".png";//二维码生成以后存放的地址
File dir = new File(outputPath);
if (dir.exists()) { //判断文件是否存在
System.out.println("file exists");
}else {
ZXingCode.getLogoQRCode(content, "", filePath, outputPath);//生成带logo的二维码图片
}
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