ZXing
ZXing(Zebra Crossing)是一个Google开源的,支持多种格式的条形码图像处理库,使用java实现,同时为其他语言提供接口。
Maven的POM.xml文件
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.2.0</version>
</dependency>
Google提供的Util类
package com.freud.test.TestZxing;
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;
public final class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
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);
}
}
return image;
}
public static void writeToFile(BitMatrix matrix, String format, File file)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format "
+ format + " to " + file);
}
}
public static void writeToStream(BitMatrix matrix, String format,
OutputStream stream) throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format "
+ format);
}
}
}
入口类
package com.freud.test.TestZxing;
import java.awt.image.BufferedImage;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
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.Reader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
public class Test {
public static String generate() throws Exception {
String text = "HelloWorld";
int width = 300;
int height = 300;
// 二维码的图片格式
String format = "png";
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
// 内容所使用编码
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(text,
BarcodeFormat.QR_CODE, width, height, hints);
// 生成二维码
File outputFile = new File(
"f:"
+ File.separator
+ "qrcode"
+ File.separator
+ new SimpleDateFormat("yyyy-MM-dd HH-mm-ss")
.format(new Date()) + ".png");
System.out.println("图片生成在:[" + outputFile.getAbsolutePath() + "]");
MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
return outputFile.getAbsolutePath();
}
public static void read(String fileName) throws Exception {
Reader reader = new MultiFormatReader();
BufferedImage image = ImageIO.read(new File(fileName));
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap bitmap = new BinaryBitmap(binarizer);
Map<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = reader.decode(bitmap);
System.out.println(result.toString());
}
public static void main(String[] args) throws Exception {
String filePath = generate();
read(filePath);
}
}
生成的二维码
参考资料
http://blog.csdn.net/feiyu84/article/details/9089497
ZXing官网https://github.com/zxing/zxing