Java zxing生成條形碼和二維嗎程式碼例項
阿新 • • 發佈：2020-03-06
在如今的生活中，二維碼隨處可見，二維碼的出現既減少了宣傳紙張的浪費，又方便了人們的生活。這一篇我來說說 Java 利用第三方 Jar 包 zxing 生成二維碼。
依賴
<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.3</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.3</version> </dependency>
生成二維碼
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://www.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 height) {
Map hint = new HashMap();
hint.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.H);
hint.put(EncodeHintType.CHARACTER_SET,charset);
return createQRCode(data,charset,hint,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,Map<EncodeHintType,?> hint,int height) {
BitMatrix matrix;
try {
matrix = new MultiFormatWriter().encode(new String(data.getBytes(charset),charset),BarcodeFormat.QR_CODE,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,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_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 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,File logoFile) {
Map hint = new HashMap();
hint.put(EncodeHintType.ERROR_CORRECTION,charset);
hint.put(EncodeHintType.MARGIN,2);
return createQRCodeWithLogo(data,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,File logoFile) {
try {
BufferedImage qrcode = createQRCode(data,height);
BufferedImage logo = ImageIO.read(logoFile);
BufferedImage combined = new BufferedImage(height,BufferedImage.TYPE_INT_ARGB);
Graphics2D g = (Graphics2D) combined.getGraphics();
//設定二維碼大小，太大，會覆蓋二維碼，此處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();
//設定logo圖片放置位置--中心
int x = Math.round((qrcode.getWidth() - logoWidth) / 2);
int y = Math.round((qrcode.getHeight() - logoHeight) / 2);
g.drawImage(qrcode,null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,1f));
//開始合併繪製圖片
g.drawImage(logo,x,logoWidth,logoHeight,null);
g.drawRoundRect(x,15,15);
//logo邊框大小
g.setStroke(new BasicStroke(3));
//logo邊框顏色
g.setColor(Color.white);
g.drawRoundRect(x,15);
g.dispose();
logo.flush();
qrcode.flush();
return combined;
} catch (IOException 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,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);
}
}
}
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二維碼生成/解碼
*/
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部落格");
System.out.println("finished zxing QRcode encode.");
System.out.println(Arrays.toString(Base64.decodeBase64(str)));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 生成二維碼圖片
* @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,toDecodeHintType());
return encode(bim,savePath,new LogoConfig(),remark);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 是否需要給二維碼圖片新增Logo
* @param bim
* @param logoPath
* @param savePath
* @param logoConfig
* @param remark
* @return
*/
private static String encode(BufferedImage bim,LogoConfig logoConfig,String remark) {
ByteArrayOutputStream baos = null;
try {
/**
* 讀取二維碼圖片
*/
BufferedImage image = bim;
if(StringUtils.isBlank(logoPath)){ //不需要新增logo
baos = new ByteArrayOutputStream();
baos.flush();
ImageIO.write(image,baos);//流輸出
//ImageIO.write(bim,new File(savePath));//直接寫入某路徑，本地測試加上
return Base64.encodeBase64URLSafeString(baos.toByteArray());//Encodes binary data using a URL-safe variation of the base64 algorithm
}
/**
* 構建繪圖物件
*/
Graphics2D g = image.createGraphics();
/**
* 讀取Logo圖片
*/
BufferedImage logo = ImageIO.read(new File(logoPath));
/**
* 設定logo的大小,設定為二維碼圖片的20%,因為過大會蓋掉二維碼
*/
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);
*/
// 開始繪製圖片
g.drawImage(logo,widthLogo,heightLogo,null);
// g.drawRoundRect(x,15);
// g.setStroke(new BasicStroke(logoConfig.getBorder()));
// g.setColor(logoConfig.getBorderColor());
// g.drawRect(x,heightLogo);
g.dispose();
// 把備註新增上去，備註不要太長超過兩行會自動擷取
if ( StringUtils.isNotBlank(remark)){
// 新的圖片，把帶logo的二維碼下面加上文字
BufferedImage outImage = new BufferedImage(400,445,BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D outg = outImage.createGraphics();
// 畫二維碼到新的面板
outg.drawImage(image,image.getWidth(),image.getHeight(),null);
// 畫文字到新的面板
outg.setColor(Color.BLACK);
outg.setFont(new Font("微軟雅黑",Font.BOLD,30)); // 字型、字型、字號
int strWidth = outg.getFontMetrics().stringWidth(remark);
if (strWidth > 399) {
// //長度過長就擷取前面部分
// outg.drawString(productName,image.getHeight() +
// (outImage.getHeight() - image.getHeight())/2 + 5 ); //畫文字
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,outImage.getWidth(),outImage.getHeight(),null);
outg2.setColor(Color.BLACK);
outg2.setFont(new Font("微軟雅黑",30)); // 字型、字型、字號
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); // 畫文字
}
outg.dispose();
outImage.flush();
image = outImage;
}
logo.flush();
image.flush();
baos = new ByteArrayOutputStream();
baos.flush();
ImageIO.write(image,baos); //不用MatrixToImageWriter
//ImageIO.write(image,new File(savePath));//直接寫入某路徑
return Base64.encodeBase64URLSafeString(baos.toByteArray());
} catch (Exception e) {
e.printStackTrace();
} finally {
IOUtils.closeQuietly(baos);
}
return null;
}
/**
* 生成二維碼bufferedImage圖片
* @param content 編碼內容
* @param barcodeFormat 編碼型別
* @param width 圖片寬度
* @param height 圖片高度
* @param hints 設定引數
* @return
*/
private static BufferedImage toBufferedImage(String content,BarcodeFormat barcodeFormat,?> hints) {
MultiFormatWriter multiFormatWriter = null;
BitMatrix bitMatrix = null;
BufferedImage image = null;
try {
multiFormatWriter = new MultiFormatWriter();
// 引數順序分別為：編碼內容，編碼型別，生成圖片寬度，生成圖片高度，設定引數
bitMatrix = multiFormatWriter.encode(content,barcodeFormat,hints);
int w = bitMatrix.getWidth();
int h = bitMatrix.getHeight();
image = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
// 開始利用二維碼資料建立Bitmap圖片，分別設為黑（0xFFFFFFFF）白（0xFF000000）兩色
for (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
image.setRGB(x,bitMatrix.get(x,y) ? MatrixToImageConfig.BLACK : MatrixToImageConfig.WHITE);
}
}
} catch (WriterException e) {
e.printStackTrace();
}
return image;
}
/**
* 設定二維碼的格式引數
* @return
*/
private static Map<EncodeHintType,Object> toDecodeHintType() {
// 用於設定QR二維碼引數
Map<EncodeHintType,Object> hints = new HashMap<EncodeHintType,Object>();
// 設定QR二維碼的糾錯級別（H為最高級別）具體級別資訊
hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.H);
// 設定編碼方式
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;
}
/**
* 二維碼解碼
*
* @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<DecodeHintType,Object> hints = new HashMap<DecodeHintType,Object>();
hints.put(DecodeHintType.CHARACTER_SET,"UTF-8");
result = new MultiFormatReader().decode(bitmap,hints);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
/**
* Logo圖片配置
*/
class LogoConfig {
// logo預設邊框顏色
public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
// logo預設邊框寬度
public static final int DEFAULT_BORDER = 2;
// logo大小預設為照片的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 getLogoPart() {
return logoPart;
}
}生成條形碼
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條形碼編碼/解碼
*/
public class ZxingCode {
/**
* 條形碼編碼
*
* @param contents
* @param width
* @param height
* @param imgPath
*/
public static void encode(String contents,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,null);
MatrixToImageWriter.writeToFile(bitMatrix,new File(imgPath));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 條形碼解碼
*
* @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,imgPath);
System.out.println("finished zxing EAN-13 encode.");
String decodeContent = decode(imgPath);
System.out.println("解碼內容如下：" + decodeContent);
System.out.println("finished zxing EAN-13 decode.");
}
}
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。