定制自定义二维码
基于zxing的二维码生成笔记
参考:sanfye,在其基础上添加了在前端显示的扩展
前言
随着微信和支付宝的流行,二维码也渐渐的进入了人们的生活中了.
这里,就google的zxing做一个简单的demo
github项目地址zxing_demo
引入jar包
下载jar包
zxing项目地址:github.com/zxing/zxing
jar包下载地址: 点我下载
将下载的jar包导入到项目
matrixToImageWriter类
google提供的matrixToImageWriter类
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import com.google.zxing.common.BitMatrix;
/*
二维码的生成需要借助MatrixToImageWriter类,该类是由Google提供的,可以将该类直接拷贝到源码中使用,当然你也可以自己写个
生产条形码的基类
*/
public class MatrixToImageWriter {
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
private MatrixToImageWriter() {
}
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 static void writeToFile(BitMatrix matrix, String format, File file,String logUri) throws IOException {
System.out.println("write to file");
BufferedImage image = toBufferedImage(matrix);
//设置logo图标
QRCodeFactory logoConfig = new QRCodeFactory();
try {
image = logoConfig.setMatrixLogo(image, logUri);
} catch (Exception e) {
System.err.println("404:logo地址找不到");
}
if (!ImageIO.write(image, format, file)) {
System.out.println("生成图片失败");
throw new IOException("Could not write an image of format " + format + " to " + file);
}else{
System.out.println("图片生成成功!");
}
}
public static void writeToStream(BitMatrix matrix, String format, OutputStream stream,String logUri) throws IOException {
BufferedImage image = toBufferedImage(matrix);
//设置logo图标
QRCodeFactory logoConfig = new QRCodeFactory();
image = logoConfig.setMatrixLogo(image, logUri);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
}
封装的QRCodeFactory
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
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;
public class QRCodeFactory {
/**
* 给生成的二维码添加中间的logo
* @param matrixImage 生成的二维码
* @param logUri logo地址
* @return 带有logo的二维码
* @throws IOException logo地址找不到会有io异常
*/
public BufferedImage setMatrixLogo(BufferedImage matrixImage,String logUri) 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
*/
BufferedImage logo = ImageIO.read(new File(logUri));
//开始绘制图片
g2.drawImage(logo,matrixWidth/5*2,matrixHeigh/5*2, matrixWidth/5, matrixHeigh/5, null);
//绘制边框
BasicStroke stroke = new BasicStroke(5,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
// 设置笔画对象
g2.setStroke(stroke);
//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);
// 绘制圆弧矩形
g2.draw(round);
//设置logo 有一道灰色边框
BasicStroke stroke2 = new BasicStroke(1,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND);
// 设置笔画对象
g2.setStroke(stroke2);
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 ;
}
/**
* 创建我们的二维码图片
* @param content 二维码内容
* @param format 生成二维码的格式
* @param outFileUri 二维码的生成地址
* @param logUri 二维码中间logo的地址
* @param size 用于设定图片大小(可变参数,宽,高)
* @throws IOException 抛出io异常
* @throws WriterException 抛出书写异常
*/
public void CreatQrImage(String content,String format,String outFileUri,String logUri, int ...size) throws IOException, WriterException{
int width = 430; // 二维码图片宽度 430
int height = 430; // 二维码图片高度430
//如果存储大小的不为空,那么对我们图片的大小进行设定
if(size.length==2){
width=size[0];
height=size[1];
}else if(size.length==1){
width=height=size[0];
}
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
// 指定纠错等级,纠错级别(L 7%、M 15%、Q 25%、H 30%)
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 内容所使用字符集编码
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
//hints.put(EncodeHintType.MAX_SIZE, 350);//设置图片的最大值
//hints.put(EncodeHintType.MIN_SIZE, 100);//设置图片的最小值
hints.put(EncodeHintType.MARGIN, 1);//设置二维码边的空度,非负数
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,//要编码的内容
//编码类型,目前zxing支持:Aztec 2D,CODABAR 1D format,Code 39 1D,Code 93 1D ,Code 128 1D,
//Data Matrix 2D , EAN-8 1D,EAN-13 1D,ITF (Interleaved Two of Five) 1D,
//MaxiCode 2D barcode,PDF417,QR Code 2D,RSS 14,RSS EXPANDED,UPC-A 1D,UPC-E 1D,UPC/EAN extension,UPC_EAN_EXTENSION
BarcodeFormat.QR_CODE,
width, //条形码的宽度
height, //条形码的高度
hints);//生成条形码时的一些配置,此项可选
// 生成二维码图片文件
File outputFile = new File(outFileUri);
//指定输出路径
System.out.println("输出文件路径为"+outputFile.getPath());
MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile,logUri);
}
/**
* 创建二维码
* @param content 二维码内容
* @param format 生成二维码的格式
* @param size 用于设定图片大小(可变参数,宽,高)
* @throws WriterException
*/
public BufferedImage CreatImg(String content,String format, int ...size) throws WriterException{
int width = 430; // 二维码图片宽度 430
int height = 430; // 二维码图片高度430
//如果存储大小的不为空,那么对我们图片的大小进行设定
if(size.length==2){
width=size[0];
height=size[1];
}else if(size.length==1){
width=height=size[0];
}
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
// 指定纠错等级,纠错级别(L 7%、M 15%、Q 25%、H 30%)
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 内容所使用字符集编码
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
//hints.put(EncodeHintType.MAX_SIZE, 350);//设置图片的最大值
//hints.put(EncodeHintType.MIN_SIZE, 100);//设置图片的最小值
hints.put(EncodeHintType.MARGIN, 1);//设置二维码边的空度,非负数
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,//要编码的内容
//编码类型,目前zxing支持:Aztec 2D,CODABAR 1D format,Code 39 1D,Code 93 1D ,Code 128 1D,
//Data Matrix 2D , EAN-8 1D,EAN-13 1D,ITF (Interleaved Two of Five) 1D,
//MaxiCode 2D barcode,PDF417,QR Code 2D,RSS 14,RSS EXPANDED,UPC-A 1D,UPC-E 1D,UPC/EAN extension,UPC_EAN_EXTENSION
BarcodeFormat.QR_CODE,
width, //条形码的宽度
height, //条形码的高度
hints);//生成条形码时的一些配置,此项可选
BufferedImage img=MatrixToImageWriter.toBufferedImage(bitMatrix);
return img;
}
}
生成本地图片
public static void main(String[] args) {
String content="https://fedemo.top";
String logUri="D:\\favicon.ico";
String outFileUri="D:\\img.jpg";
int[] size=new int[]{430,430};
String format = "jpg";
try {
new QRCodeFactory().CreatQrImage(content, format, outFileUri, logUri,size);
} catch (IOException e) {
e.printStackTrace();
} catch (WriterException e) {
e.printStackTrace();
}
}

将img流在前端显示
/**
* 获得二维码
* @param mapping
* @param form
* @param request
* @param response
* @throws Exception
*/
public void img(final ActionMapping mapping,
final ActionForm form, final HttpServletRequest request,
final HttpServletResponse response) throws Exception {
String content="https://fedemo.top";
int[] size=new int[]{300,300};
String format = "jpg";
BufferedImage img=null;
try {
img=new QRCodeFactory().CreatImg(content, format, size);
} catch (WriterException e) {
e.printStackTrace();
}
ImageIO.write(img , "jpg", response.getOutputStream());
}
img图片
<img src="code.do?method=img">

版权声明
本文为博主Fe原创文章,转载请注明出处 https:/fedemo.top/2018/02/07/zxing-qrcode/