Java zxing生成条形码和二维吗代码实例

Java zxing生成条形码和二维吗代码实例

在如今的生活中，二维码随处可见，二维码的出现既减少了宣传纸张的浪费，又方便了人们的生活。这一篇我来说说 java 利用第三方 Jar 包 zxing 生成二维码。

依赖

com.google.zxing

core

3.3.3

com.google.zxing

javase

3.3.3

生成二维码

package code;

import com.google.zxing.*;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import org.apache.commons.codec.binary.Base64;

import org.apache.commons.codec.binary.Base64OutputStream;

import javax.imageio.ImageIO;

import java.awt.*;

import java.awt.image.BufferedImage;

import java.io.*;

import java.util.HashMap;

import java.util.Map;

public class QRCodeKit {

public static final String QRCODE_DEFAULT_CHARSET = "UTF-8";

public static final int QRCODE_DEFAULT_HEIGHT = 300;

public static final int QRCODE_DEFAULT_WIDTH = 300;

private static final int BLACK = 0xFF000000;

private static final int WHITE = 0xFFFFFFFF;

public static void main(String[] args) throws IOException, NotFoundException {

String data = "https://jianshu.com/p/748aa03cc1e8?ddd=dsdsdsdsddsdsdsdsdsdsdsdsd";

File logoFile = new File("C:/1.png");

BufferedImage image = QRCodeKit.createQRCodeWithLogo(data, logoFile);

ImageIO.write(image, "png", new File("D:/result7.png"));

System.out.println("done");

}

/**

* Create qrcode with default settings

*

* @param data

* @return

* @author stefli

*/

public static BufferedImage createQRCode(String data) {

return createQRCode(data, QRCODE_DEFAULT_WIDTH, QRCODE_DEFAULT_HEIGHT);

}

/**

* Create qrcode with default charset

*

* @param data

* @param width

* @param height

* @return

* @author stefli

*/

public static BufferedImage createQRCode(String data, int width, int height) {

return createQRCode(data, QRCODE_DEFAULT_CHARSET, width, height);

}

/**

* Create qrcode with specified charset

*

* @param data

* @param charset

* @param width

* @param height

* @return

* @author stefli

*/

public static BufferedImage createQRCode(String data, String charset, int width, int height) {

Map hint = new HashMap();

hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

hint.put(EncodeHintType.CHARACTER_SET, charset);

return createQRCode(data, charset, hint, width, height);

}

/**

* Create qrcode with specified hint

*

* @param data

* @param charset

* @param hint

* @param width

* @param height

* @return

* @author stefli

*/

public static BufferedImage createQRCode(String data, String charset, Map hint, int width,

int height) {

BitMatrix matrix;

try {

matrix = new MultiFormatWriter().encode(new String(data.getBytes(charset), charset), BarcodeFormat.QR_CODE,

width, height, hint);

return toBufferedImage(matrix);

} catch (WriterException e) {

throw new RuntimeException(e.getMessage(), e);

} catch (Exception e) {

throw new RuntimeException(e.getMessage(), e);

}

}

/**

* toBufferedImage

*

* @param matrix

* @return

*/

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);

}

}

return image;

}

/**

* Create qrcode with default settings and logo

*

* @param data

* @param logoFile

* @return

* @author stefli

*/

public static BufferedImage createQRCodeWithLogo(String data, File logoFile) {

return createQRCodeWithLogo(data, QRCODE_DEFAULT_WIDTH, QRCODE_DEFAULT_HEIGHT, logoFile);

}

/**

* Create qrcode with default charset and logo

*

* @param data

* @param width

* @param height

* @param logoFile

* @return

* @author stefli

*/

public static BufferedImage createQRCodeWithLogo(String data, int width, int height, File logoFile) {

return createQRCodeWithLogo(data, QRCODE_DEFAULT_CHARSET, width, height, logoFile);

}

/**

* Create qrcode with specified charset and logo

*

* @param data

* @param charset

* @param width

* @param height

* @param logoFile

* @return

* @author stefli

*/

@SuppressWarnings({"unchecked", "rawtypes"})

public static BufferedImage createQRCodeWithLogo(String data, String charset, int width, int height, File logoFile) {

Map hint = new HashMap();

hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

hint.put(EncodeHintType.CHARACTER_SET, charset);

hint.put(EncodeHintType.MARGIN, 2);

return createQRCodeWithLogo(data, charset, hint, width, height, logoFile);

}

/**

* Create qrcode with specified hint and logo

*

* @param data

* @param charset

* @param hint

* @param width

* @param height

* @param logoFile

* @return

* @author stefli

*/

public static BufferedImage createQRCodeWithLogo(String data, String charset, Map hint,

int width, int height, File logoFile) {

try {

BufferedImage qrcode = createQRCode(data, charset, hint, width, height);

BufferedImage logo = ImageIO.read(logoFile);

BufferedImage combined = new BufferedImage(height, width, BufferedImage.TYPE_INT_ARGB);

Graphics2D g = (Graphics2D) combined.getGraphics();

//设置二维码大小，太大，会覆盖二维码，此处20%

int logoWidth = logo.getWidth() > qrcode.getWidth() * 2 / 10 ? (qrcode.getWidth() * 2 / 10) : logo.getWidth();

int logoHeight = logo.getHeight() > qrcode.getHeight() * 2 / 10 ? (qrcode.getHeight() * 2 / 10) : logo.getHeight();

//设置logo图片放置位置--中心

int x = Math.round((qrcode.getWidth() - logoWidth) / 2);

int y = Math.round((qrcode.getHeight() - logoHeight) / 2);

g.drawImage(qrcode, 0, 0, null);

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));

//开始合并绘制图片

g.drawImage(logo, x, y, logoWidth, logoHeight, null);

g.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15);

//logo边框大小

g.setStroke(new BasicStroke(3));

//logo边框颜色

g.setColor(Color.white);

g.drawRoundRect(x, y, logoWidth, logoHeight, 15, 15);

g.dispose();

logo.flush();

qrcode.flush();

return combined;

} catch (IOException e) {

throw new RuntimeException(e.getMessage(), e);

} catch (Exception e) {

throw new RuntimeException(e.getMessage(), e);

}

}

/**

* Return base64 for image

*

* @param image

* @return

* @author stefli

*/

public static String getImageBase64String(BufferedImage image) {

String result = null;

try {

ByteArrayOutputStream os = new ByteArrayOutputStream();

OutputStream b64 = new Base64OutputStream(os);

ImageIO.write(image, "png", b64);

result = os.toString("UTF-8");

} catch (UnsupportedEncodingException e) {

throw new RuntimeException(e.getMessage(), e);

} catch (IOException e) {

throw new RuntimeException(e.getMessage(), e);

}

return result;

}

/**

* Decode the base64Image data to image

*

* @param base64ImageString

* @param file

* @author stefli

*/

public static void convertBase64StringToImage(String base64ImageString, File file) {

FileOutputStream os;

try {

Base64 d = new Base64();

byte[] bs = d.decode(base64ImageString);

os = new FileOutputStream(file.getAbsolutePath());

os.write(bs);

os.close();

} catch (FileNotFoundException e) {

throw new RuntimeException(e.getMessage(), e);

} catch (IOException e) {

throw new RuntimeException(e.getMessage(), e);

} catch (Exception e) {

throw new RuntimeException(e.getMessage(), e);

}

}

}

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.Arrays;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import javax.imageio.ImageIO;

import org.apache.commons.codec.binary.Base64;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang.StringUtils;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.DecodeHintType;

import com.google.zxing.EncodeHintType;

import com.google.zxing.LuminanceSource;

import com.google.zxing.MultiFormatReader;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.Result;

import com.google.zxing.WriterException;

import com.google.zxing.client.j2se.BufferedImageLuminanceSource;

import com.google.zxing.client.j2se.MatrixToImageConfig;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**

* ZXing二维码生成/解码

*/

public class ZXingCode {

public static void main(String[] args) throws WriterException {

try {

String logoPath = "F:/logo.jpg";

String logo_savePath = "F:/" + new Date().getTime() + ".png";

String str = toQRCode("http://blog.csdn.net/phil_jing", logoPath, logo_savePath, "CSDN博客");

System.out.println("finished zxing QRcode encode.");

System.out.println(Arrays.toString(Base64.decodeBase64(str)));

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 生成二维码图片

* @param content

* @param logoPath

* @param savePath

* @param remark

* @return

*/

public static String toQRCode(String content, String logoPath, String savePath, String remark) {

int width = 400, height = 400;

try {

BufferedImage bim = toBufferedImage(content, BarcodeFormat.QR_CODE, width, height, toDecodeHintType());

return encode(bim, logoPath, savePath, new LogoConfig(), remark);

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* 是否需要给二维码图片添加Logo

* @param bim

* @param logoPath

* @param savePath

* @param logoConfig

* @param remark

* @return

*/

private static String encode(BufferedImage bim, String logoPath, String savePath, LogoConfig logoConfig, String remark) {

ByteArrayOutputStream baos = null;

try {

/**

* 读取二维码图片

*/

BufferedImage image = bim;

if(StringUtils.isBlank(logoPath)){ //不需要添加logo

baos = new ByteArrayOutputStream();

baos.flush();

ImageIO.write(image, "png", baos);//流输出

//ImageIO.write(bim, "png", new File(savePath));//直接写入某路径，本地测试加上

return Base64.encodeBase64URLSafeString(baos.toByteArray());//Encodes binary data using a URL-safe variation of the base64 algorithm

}

/**

* 构建绘图对象

*/

Graphics2D g = image.createGraphics();

/**

* 读取Logo图片

*/

BufferedImage logo = ImageIO.read(new File(logoPath));

/**

* 设置logo的大小,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();

// 把备注添加上去，备注不要太长超过两行会自动截取

if ( StringUtils.isNotBlank(remark)){

// 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("微软雅黑", Font.BOLD, 30)); // 字体、字型、字号

int strWidth = outg.getFontMetrics().stringWidth(remark);

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

String productName1 = remark.substring(0, remark.length() / 2);

String productName2 = remark.substring(remark.length() / 2, remark.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("微软雅黑", 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(remark, 200 - strWidth / 2, image.getHeight() + (outImage.getHeight() - image.getHeight()) / 2 + 12); // 画文字

}

outg.dispose();

outImage.flush();

image = outImage;

}

logo.flush();

image.flush();

baos = new ByteArrayOutputStream();

baos.flush();

ImageIO.write(image, "png", baos); //不用MatrixToImageWriter

//ImageIO.write(image, "png", new File(savePath));//直接写入某路径

return Base64.encodeBase64URLSafeString(baos.toByteArray());

} catch (Exception e) {

e.printStackTrace();

} finally {

IOUtils.closeQuietly(baos);

}

return null;

}

/**

* 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

*/

private static BufferedImage toBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height,

Map hints) {

MultiFormatWriter multiFormatWriter = null;

BitMatrix bitMatrix = 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

bitMatrix = multiFormatWriter.encode(content, barcodeFormat, widthttp://h, height, hints);

int w = bitMatrix.getWidth();

int h = bitMatrix.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, bitMatrix.get(x, y) ? MatrixToImageConfig.BLACK : MatrixToImageConfig.WHITE);

}

}

} catch (WriterException e) {

e.printStackTrace();

}

return image;

}

/**

* 设置二维码的格式参数

* @return

*/

private static Map toDecodeHintType() {

// 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, QjEGIsGlbPErrorCorrectionLevel.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);//Only applicable to Data Matrix now

//hints.put(EncodeHintType.MIN_SIZE, 100);//Only applicable to Data Matrix now

return hints;

}

/**

* 二维码解码

*

* @param imgPath

* @return

*/

public static String decode(String imgPath) {

BufferedImage image = null;

Result result = null;

try {

File file = new File(imgPath);

image = ImageIO.read(file);

if (image == null) {

System.out.println("the decode image may be not exit.");

}

LuminanceSource source = new BufferedImageLuminanceSource(image);

BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

Map hints = new HashMap();

hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");

result = new MultiFormatReader().decode(bitmap, hints);

return result.getText();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

}

/**

* Logo图片配置

*/

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 getLogoPahttp://rt() {

return logoPart;

}

}

生成条形码

import java.awt.image.BufferedImage;

import java.io.File;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.LuminanceSource;

import com.google.zxing.MultiFormatReader;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.Result;

import com.google.zxing.client.j2se.BufferedImageLuminanceSource;

import com.google.zxing.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;

/**

* ZXing条形码编码/解码

*/

public class ZxingCode {

/**

* 条形码编码

*

* @param contents

* @param width

* @param height

* @param imgPath

*/

public static void encode(String contents, int width, int height, String imgPath) {

int codeWidth = 3 + // start guard

(7 * 6) + // left bars

+ // middle guard

(7 * 6) + // right bars

3; // end guard

codeWidth = Math.max(codeWidth, width);

try {

BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,BarcodeFormat.EAN_13, codeWidth, height, null);

MatrixToImageWriter.writeToFile(bitMatrix, "png", new File(imgPath));

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 条形码解码

*

* @param imgPath

* @return String

*/

public static String decode(String imgPath) {

BufferedImage image = null;

Result result = null;

try {

image = ImageIO.read(new File(imgPath));

if (image == null) {

System.out.println("the decode image may be not exit.");

}

LuminanceSource source = new BufferedImageLuminanceSource(image);

BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

result = new MultiFormatReader().decode(bitmap, null);

return result.getText();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* @param args

*/

public static void main(String[] args) {

String imgPath = "F:/zxing_EAN-13.png";

String contents = "6926557300360";

int width = 105, height = 50;

encode(contents, width, height, imgPath);

System.out.println("finished zxing EAN-13 encode.");

String decodeContent = decode(imgPath);

System.out.println("解码内容如下：" + decodeContent);

System.out.println("finished zxing EAN-13 decode.");

}

}

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