QRCode.jar和Qrcode_swetake.jar,zixing.jar包下载
先去下载QRCode要用到的jar包
把这2个jar包添加到项目组,如果用到了maven的话,就可以直接在里面引用地址了,两种方式任何一种都可以,只要添加正确。
下面开始写代码package com.wmsDemo.QRCode;import java.awt.Color;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import javax.imageio.ImageIO;import com.swetake.util.Qrcode;public class QRCodeEncoderHandler { public void encoderQRCode(String content, String imgPath) { try { Qrcode qrcodeHandler = new Qrcode(); // 设置二维码排错率,可选L(7%)、M(15%)、Q(25%)、H(30%),排错率越高可存储的信息越少,但对二维码清晰度的要求越小 qrcodeHandler.setQrcodeErrorCorrect('H'); qrcodeHandler.setQrcodeEncodeMode('B'); qrcodeHandler.setQrcodeVersion(5); System.out.println(content); // int imgSize = 67 + 12 * (size - 1); byte[] contentBytes = content.getBytes('gb2312'); BufferedImage bufImg = new BufferedImage(115, 115, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 115, 115); // 设定图像颜色> BLACK gs.setColor(Color.BLACK); // 设置偏移量 不设置可能导致解析出错 int pixoff = 2; // 输出内容> 二维码 if (contentBytes.length > 0 && contentBytes.length < 800) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i < codeOut.length; i++) { for (int j = 0; j < codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { System.err.println('QRCode content bytes length = ' + contentBytes.length + ' not in [ 0,120 ]. '); } gs.dispose(); bufImg.flush(); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, 'png', imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * @param args the command line arguments */ public static void main(String[] args) { //取当前时间为图片名称 带毫秒的 SimpleDateFormat sdf = new SimpleDateFormat('yyyyMMddHHmmssSSS' ); Date d=new Date(); String str=sdf.format(d); String imgPath = 'D:/QRCode/twocode/'+str+'.png'; String content= '这是测试'; QRCodeEncoderHandler handler = new QRCodeEncoderHandler(); handler.encoderQRCode(content, imgPath); System.out.println('imgPath:'+imgPath); System.out.println('encoder QRcode success'); } }
上面就是qrcode生成二维码的方式了,下面介绍下用zixing生成二维码的方式。
package com.wmsDemo.QRCode; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; import java.io.IOException; import java.awt.image.BufferedImage; 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); } } }
package com.wmsDemo.QRCode;import java.io.File;import java.util.HashMap;import java.util.Map;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.common.BitMatrix; public class Test { /** * @param args * @throws Exception */ public static void main(String[] args){ try { String content = '这是测试xing二维码生成'; // String path = 'D:/tt'; String path = 'D:/java/apache-tomcat-7.0.47/webapps/wmsDemo/QRCode'; MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); Map hints = new HashMap(); //内容所使用编码 hints.put(EncodeHintType.CHARACTER_SET, 'gb2312'); BitMatrix bitMatrix = multiFormatWriter.encode(content,BarcodeFormat.QR_CODE, 200, 200, hints); //生成二维码 File outputFile = new File(path,'14.jpg'); MatrixToImageWriter.writeToFile(bitMatrix, 'jpg', outputFile); } catch (Exception e) { e.printStackTrace(); } } }
通过上面的main方法测试可以看到二维码已经生成成功,并且扫描成功,好多参数如果有需要可以自己去设置
注意编码格式