最近有负责微信开发，对于微信开发的项目，肯定少不了二维码啦，正好有个这样的需求，这对不同的商品生成一个二维码，扫码即刻下单。博主就弄了一个二维码生成的工具类。
弄出来之后，产品经理又说了，中间放上公司的logo是不是好一点？加上吧，
加上公司logo之后，产品经理想了想，每个商品都有个二维码，销售人员有很多个商品二维码，群发给用户，在qq群上，微信群上，怎么知道哪个二维码对应哪个商品的呢？于是决定要加上商品名称。最后商品二维码就成了下面这个模样了（当然啦，这里面的logo并不是博主现职公司的）。
效果已经出来啦，下面附上代码啦
如果读者不需要logo或者二维码名称的，读懂代码后进行删减即可。注释多多，还是很容易看懂的。
package com.luo.wctweb.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 javax.servlet.http.HttpServletRequest;
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;
import com.lz.lsf.util.base64;
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
{
try
{
getLogoQRCode("https://www.baidu.com/", null, "跳转到百度的二维码");
}
catch (Exception e)
{
e.printStackTrace();
}
}
public static String 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 = new ZXingCode();
BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)
{
try
{
BufferedImage image = bim;
Graphics2D g = image.createGraphics();
BufferedImage logo = ImageIO.read(logoPic);
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);
int x = (image.getWidth() - widthLogo) / 2;
int y = (image.getHeight() - heightLogo) / 2;
//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 其中${imagebase64QRCode}对应二维码的imagebase64字符串
ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO
String imagebase64QRCode = base64.byteArrayTobase64(baos.toByteArray());
baos.close();
return imagebase64QRCode;
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
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;
}
public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map 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;
}
public Map getDecodeHintType()
{
// 用于设置QR二维码参数
Map hints = new HashMap();
// 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;
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;
}
}
需要说明的是以上代码依赖了com.google.zxing这个插件，如果读者跟博主一样都是使用maven的话，添加下面依赖即可。
如果没有用maven的话，直接在http://maven.outofmemory.cn/com.google.zxing/core/3.1.0/ 下载。
com.google.zxing core3.1.0
以上就是Java生成中间logo的二维码的示例代码的详细内容，更多关于Java生成中间logo的二维码的资料请关注考高分网其它相关文章！
