java生成二维码使用QRCode和ZXing两种方式

QRCode是日本人开发的ZXing是google开发的

QRCode方式：

package cn.utils;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.UnsupportedEncodingException;import javax.imageio.ImageIO;import jp.sourceforge.qrcode.QRCodeDecoder;import jp.sourceforge.qrcode.data.QRCodeImage;import jp.sourceforge.qrcode.exception.DecodingFailedException;import com.swetake.util.Qrcode;public class QRCodeUtils {/** * 编码字符串内容到目标File对象中 *  * @param encodeddata 编码的内容 * @param destFile生成file文件  1381090722   5029067275903 * @throws IOException */public static void qrCodeEncode(String encodeddata, File destFile) throws IOException {Qrcode qrcode = new Qrcode();qrcode.setQrcodeErrorCorrect('M');// 纠错级别（L 7%、M 15%、Q 25%、H 30%）和版本有关qrcode.setQrcodeEncodeMode('B');qrcode.setQrcodeVersion(7);// 设置Qrcode包的版本byte[] d = encodeddata.getBytes("GBK");// 字符集BufferedImage bi = new BufferedImage(139, 139, BufferedImage.TYPE_INT_RGB);// createGraphics// 创建图层Graphics2D g = bi.createGraphics();g.setBackground(Color.WHITE);// 设置背景颜色（白色）g.clearRect(0, 0, 139, 139);// 矩形 X、Y、width、heightg.setColor(Color.BLACK);// 设置图像颜色（黑色）if (d.length > 0 && d.length < 123) {boolean[][] b = qrcode.calQrcode(d);for (int i = 0; i < b.length; i++) {for (int j = 0; j < b.length; j++) {if (b[j][i]) {g.fillRect(j * 3 + 2, i * 3 + 2, 3, 3);}}}}//Image img = ImageIO.read(new File("D:/tt.png"));  logo//g.drawImage(img, 25, 55,60,50, null);g.dispose(); // 释放此图形的上下文以及它使用的所有系统资源。调用 dispose 之后，就不能再使用 Graphics 对象bi.flush(); // 刷新此 Image 对象正在使用的所有可重构的资源ImageIO.write(bi, "png", destFile);System.out.println("Input Encoded data is：" + encodeddata);}/** * 解析二维码，返回解析内容 *  * @param imageFile * @return */public static String qrCodeDecode(File imageFile) {String decodedData = null;QRCodeDecoder decoder = new QRCodeDecoder();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");System.out.println("Output Decoded Data is：" + decodedData);} catch (DecodingFailedException dfe) {System.out.println("Error: " + dfe.getMessage());} catch (UnsupportedEncodingException e) {e.printStackTrace();}return decodedData;}public static void main(String[] args) {String FilePath = "d:/qrcode.png";File qrFile = new File(FilePath);// 二维码内容String encodeddata = "Hello X-rapido";try {QRCodeUtils.qrCodeEncode(encodeddata, qrFile);} catch (IOException e) {e.printStackTrace();}// 解码String reText = QRCodeUtils.qrCodeDecode(qrFile);System.out.println(reText);}}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);}}

Zxing方式

package cn.utils.code;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);}}}

编写main方法

package cn.utils.code;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 = "NiuYueYue I Love You！"; // 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 = "gif";// 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.gif");MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);}}

两种方式都可以进行创建二维码并解析，一般项目中很少使用自己写二维码，在网站上提供了很多在线二维码生成器，其中高级设计模式中有很多功能