java生成二维码QRCode Zxing SwetakeQRCode barcode4j
最常见的就是QRcode二维码
一、Zxing
1.推荐使用Zxing Google出的,大厂商,文档齐全。也可生成条形码,Android上一般也采用Zxing。
2.可生成、读取二维码,可嵌入图片(logo),支持中文
3.编写代码量很少,就可生成二维码
4.生成的二维码的位点少,好识别
5.生成的二维码,占用存储空间小,2K
所需jar包:core-2.2.jar,jdk 1.6。自2.2以后需要jdk1.7,否则会报错
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/google/zxing/EncodeHintType : Unsupported major.minor version 51.0
所需jar包:core-2.2.jar,附件提供
二、SwetakeQRCode
1.下载jar包都费劲,不推荐
2.可生成、读取二维码,可嵌入图片(logo),支持中文
3.编写代码量较多
4.生成的二维码的位点多,
5.生成的二维码,占用存储空间少,1K
所需jar包:QRCode.jar
代码参考:
http://www.oschina.net/code/snippet_1762525_49027
三、 barcode4j
datamatrix
PDF417
采用datamatrix算法,生成的二维码是长方形的,不是我想要的
貌似不支持中文
存储容量较大,8K-24K,因为他的黑点旁边有灰色格线
所需jar包:avalon-framework-4.2.0.jar,barcode4j.jar
代码参考:
http://liuwei1981.iteye.com/blog/368812
有一句有问题
// ret = FileUtil.getInputStreamFromBytes(baos.toByteArray());
ret = new ByteArrayInputStream(baos.toByteArray());
补充方法
public static void saveFile(InputStream is, String fileName) throws Exception { FileOutputStream fos = new FileOutputStream(new File(fileName)); byte[] b = new byte[1024]; while((is.read(b)) != -1){ fos.write(b); } is.close(); fos.close(); } public static void main(String[] args) throws Exception { InputStream is = CodeService.getInstance().getCodeImage("Tiantian,I love you!", CodeService.BARCODE_TYPE ); saveFile(is, "D:/barcode4j.png"); }
二维码里嵌图片logo,就是利用二维码容错机制实现的,其实就是在二维码上画的图片,
Zxing样例:
参考:http://tec.5lulu.com/detail/110d4n2ehcg9a857d.html#tec_dir1
import java.io.File; import java.util.Hashtable; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; public class Main { public static void main(String[] args) throws Exception { String text = "甜甜,我爱你!"; // 二维码内容 int width = 300; // 二维码图片宽度 int height = 300; // 二维码图片高度 String format = "png";// 二维码的图片格式 Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 内容所使用字符集编码 BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints); // 生成二维码 File outputFile = new File("d:" + File.separator + "new.png"); MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); } }
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 */ public 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); } } }
js jquery.qrcode生成二维码 带logo 支持中文
http://happyqing.iteye.com/blog/2294628
ZXing生成二维码,以及给二维码添加Logo
http://my.oschina.net/Rayn/blog/215055
Zxing和QR CODE 生成与解析二维码实例(带logo篇)
http://blog.csdn.net/gao36951/article/details/41149049
ZXing生成二维码和带logo的二维码,模仿微信生成二维码效果
http://blog.csdn.net/sanfye/article/details/45749139
带圆角LOGO的QrCode二维码实时生成 (这个格式太乱了)
http://www.th7.cn/Program/java/201412/336803.shtml
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