java生成带有图片的二维码
1.原始代码如下：
package com.mycompany.qrcodeutil;
/**
* @author Alexs
* @date 20181224 13:35:01
* @email [email protected]
* @version V1.0
* @desc
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.imageio.ImageIO;
import com.swetake.util.Qrcode;
import java.awt.Image;
import java.io.InputStream;
import java.io.OutputStream;
import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.data.QRCodeImage;
import jp.sourceforge.qrcode.exception.DecodingFailedException;
public class QRCodeUtil {
//设置二维码中间图片的宽高
private int imageWidth = 30;
private int imageHeight = 30;
private String codeType = "utf-8";
private BufferedImage qrCodeEncode(String content, String imgType, int size) {
BufferedImage bufImg = null;
try {
Qrcode qrcodeHandler = new Qrcode();
// 设置二维码排错率，可选L(7%)、M(15%)、Q(25%)、H(30%)，排错率越高可存储的信息越少，但对二维码清晰度的要求越小
qrcodeHandler.setQrcodeErrorCorrect('M');
qrcodeHandler.setQrcodeEncodeMode('B');
// 设置设置二维码尺寸，取值范围1-40，值越大尺寸越大，可存储的信息越大
qrcodeHandler.setQrcodeVersion(size);
// 获得内容的字节数组，设置编码格式
byte[] contentBytes = content.toString().getBytes(codeType);
// 图片尺寸
int imgSize = 67 + 12 * (size - 1);
bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB);
Graphics2D gs = bufImg.createGraphics();
// 设置背景颜色
gs.setBackground(Color.WHITE);
gs.clearRect(0, 0, imgSize, imgSize);
// 设定图像颜色> BLACK
gs.setColor(Color.BLACK);
// 设置偏移量，不设置可能导致解析出错
int pixoff = 2;
// 输出内容> 二维码
if (contentBytes.length > 0 && contentBytes.length < 800) {
boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
for (int i = 0; i < codeOut.length; i++) {
for (int j = 0; j < codeOut.length; j++) {
if (codeOut[j][i]) {
gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
}
}
}
} else {
throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800].");
}
gs.dispose();
bufImg.flush();
} catch (Exception e) {
e.printStackTrace();
}
return bufImg;
}
/**
* 解析二维码，返回解析内容
*
* @param imageFile
* @return
*/
public String qrCodeDecode(File imageFile) throws IOException {
String decodedData = null;
QRCodeDecoder decoder = new QRCodeDecoder();
//File file = new File("E:/baoqun.jpg");//本地图片
//BufferedImage image = (BufferedImage)ImageIO.read(file);;
BufferedImage image = null;
try {
image = ImageIO.read(imageFile);
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
}
try {
decodedData = new String(decoder.decode(new J2SEImage(image)), "GBK");
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return decodedData;
}
/**
* 解析二维码（QRCode）
*
* @param input 输入流
* @return
*/
public String decoderQRCode(InputStream input) {
BufferedImage bufImg = null;
String content = null;
try {
bufImg = ImageIO.read(input);
QRCodeDecoder decoder = new QRCodeDecoder();
content = new String(decoder.decode(new J2SEImage(bufImg)), codeType);
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
e.printStackTrace();
} catch (DecodingFailedException dfe) {
System.out.println("Error: " + dfe.getMessage());
dfe.printStackTrace();
}
return content;
}
static class J2SEImage implements QRCodeImage {
BufferedImage image;
public J2SEImage(BufferedImage image) {
this.image = image;
}
public int getWidth() {
return image.getWidth();
}
public int getHeight() {
return image.getHeight();
}
public int getPixel(int x, int y) {
return image.getRGB(x, y);
}
}
/**
* 在二维码中间加入图片
* @param bugImg
* @String imgFile
*/
private BufferedImage createPhotoAtCenter(BufferedImage bufImg, String imgFile) throws Exception {
Image im = ImageIO.read(new File(imgFile));
Graphics2D g = bufImg.createGraphics();
//获取bufImg的中间位置
int centerX = bufImg.getMinX() + bufImg.getWidth() / 2 - imageWidth / 2;
int centerY = bufImg.getMinY() + bufImg.getHeight() / 2 - imageHeight / 2;
g.drawImage(im, centerX, centerY, imageWidth, imageHeight, null);
g.dispose();
bufImg.flush();
return bufImg;
}
/**
* 生成二维码(QRCode)图片
* @param content 存储内容
* @param imgPath 中间图片路径
* @param imgType 图片类型
* @param outpath 输出二维码文件
*/
public BufferedImage encoderQRCode(String content, String imgPath, String imgType, int size, String outpath) {
try {
BufferedImage bufImg = this.qrCodeEncode(content, imgType, size);
//在二维码中间加入图片
BufferedImage _bufImg = createPhotoAtCenter(bufImg, imgPath);
File imgFile = new File(outpath);
// 生成二维码QRCode图片
ImageIO.write(_bufImg, imgType, imgFile);
return _bufImg;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 生成二维码(QRCode)图片
* @param content 存储内容
* @param output 输出流
* @param imgType 图片类型
* @param size 二维码尺寸
*/
public void encoderQRCode(String content, OutputStream output, String imgType, int size) {
try {
BufferedImage bufImg = this.qrCodeEncode(content, imgType, size);//生成二维码QRCode图片
ImageIO.write(bufImg, imgType, output);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String imgPath = "E:/baoqun.jpg";//本地图片
String filePath = "d:/qrcode.png";//生成的二维码
// 二维码内容
String encodeddata = "http://www.powermaxtech.net/";
QRCodeUtil QRCodeUtil2 = new QRCodeUtil();
// QRCodeUtil0.qrCodeEncode(encodeddata, qrFile);(encoderContent, imgPath, imgType, size,imgoutPath);
QRCodeUtil2.encoderQRCode(encodeddata, imgPath, "png", 7, filePath);
// 解码
// String reText = QRCodeUtil2.decoderQRCode(filePath);
System.out.println(QRCodeUtil2);
}
}
需要的java包 ：QRCode.jar
需要的图片：
E:/baoqun.jpg
2.结果：（d:/qrcode.png）
