java生成二维码，具体代码如下所示：
package com.bus.wx.action.code;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import com.bus.plugin.wx.action.WxAction;
import com.bus.wx.util.Limits;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.lys.sys.log.Log;
/**
* 条形码、二维码
* @author hwj
*
*/
@Scope(value = "prototype")
@Controller("Bar_Qr_Code_Action")
@RequestMapping(value="plug/wx/wwz/{bcflag}/barqrcode")
public class Bar_Qr_Code_Action extends WxAction{
private static final int LogoPart = 4;
private static final int BLACK = 0xFF000000;//用于设置图案的颜色
private static final int WHITE = 0xFFFFFFFF; //用于背景色
String format = "png";
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, (matrix.get(x, y) ? BLACK : WHITE));
// image.setRGB(x, y, (matrix.get(x, y) ? Color.YELLOW.getRGB() : Color.CYAN.getRGB()));
}
}
return image;
}
public BufferedImage LogoMatrix(BufferedImage matrixImage) throws IOException{
/**
* 读取二维码图片，并构建绘图对象
*/
Graphics2D g2 = matrixImage.createGraphics();
int matrixWidth = matrixImage.getWidth();
int matrixHeigh = matrixImage.getHeight();
/**
* 读取Logo图片
*/
String path=request.getSession().getServletContext().getRealPath("/images/logo/dzjkklog.png");
BufferedImage logo = ImageIO.read(new File(path));
//开始绘制图片
g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);//绘制
BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
g2.setStroke(stroke);// 设置笔画对象
//指定弧度的圆角矩形
RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth/5*2, matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5,20,20);
g2.setColor(Color.white);
g2.draw(round);// 绘制圆弧矩形
//设置logo 有一道灰色边框
BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
g2.setStroke(stroke2);// 设置笔画对象
RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth/5*2+2, matrixHeigh/5*2+2, matrixWidth/5-4, matrixHeigh/5-4,20,20);
g2.setColor(new Color(128,128,128));
g2.draw(round2);// 绘制圆弧矩形
g2.dispose();
matrixImage.flush() ;
return matrixImage ;
}
/**
* 生成二维码：直接将生成的二维码传输到前台页面
* @param bcflag
*/
@RequestMapping(value="createQrCodes",method = RequestMethod.GET)
public void createQrCodes(@PathVariable String bcflag,String dastid){
String url="扫二维码出现的内容";
if(url!=null&&!"".equals(url)){
ServletOutputStream stream=null;
try {
int width=430;
int height=430;
stream=response.getOutputStream();
QRCodeWriter writer=new QRCodeWriter();
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.MARGIN, 1);//设置二维码边的空度，非负数
BitMatrix bitMatrix = new MultiFormatWriter().encode(url,//要编码的内容
BarcodeFormat.QR_CODE,
width, //条形码的宽度
height, //条形码的高度
hints);
//BitMatrix m=writer.encode(url, BarcodeFormat.QR_CODE, height,width);
BufferedImage image = toBufferedImage(bitMatrix);
image = LogoMatrix(image);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
} catch (Exception e) {
Log.in.info(e.getMessage());
}finally{
if(stream!=null){
try {
stream.flush();
stream.close();
} catch (IOException e) {
Log.in.info(e.getMessage());
}
}
}
}
}
}
总结
以上所述是小编给大家介绍的java生成二维码并且给二维码添加logo，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对菜鸟教程(cainiaojc.com)网站的支持！
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