package ykxw.web.qrcode.utils; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import com.swetake.util.Qrcode; import jp.sourceforge.qrcode.QRCodeDecoder; import jp.sourceforge.qrcode.exception.DecodingFailedException; public class QRCode { /** * 解析二维码(QRCode) * @param imgPath * @return */ private static String decoderQRCode(String imgPath) { // QRCode 二维码图片的文件 File imageFile = new File(imgPath); BufferedImage bufImg = null; String content = null; try { bufImg = ImageIO.read(imageFile); QRCodeDecoder decoder = new QRCodeDecoder(); content = new String(decoder.decode(new QRCodeImageBean(bufImg)), "utf-8"); } catch (IOException e) { System.out.println("Error: " + e.getMessage()); e.printStackTrace(); } catch (DecodingFailedException dfe) { System.out.println("Error: " + dfe.getMessage()); dfe.printStackTrace(); } return content; } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param imgType 图片类型 */ private static byte[] encoderQRCode(String content,String imgType) { byte[] b = null; try { BufferedImage bufImg = qRCodeCommon(content, imgType, 7); ByteArrayOutputStream out = new ByteArrayOutputStream(); ImageIO.write(bufImg, imgType,out); b = out.toByteArray(); } catch (Exception e) { e.printStackTrace(); } return b; } /** * 生成二维码(QRCode)图片 * @param content 存储内容 * @param imgPath 图片路径 * @param imgType 图片类型 * @param size 二维码尺寸 */ private static void encoderQRCode(String content, String imgPath, String imgType, int size) { try { BufferedImage bufImg = qRCodeCommon(content, imgType, size); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, imgType, imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二维码(QRCode)图片的公共方法 * @param content 存储内容 * @param imgType 图片类型 * @param size 二维码尺寸 * @return */ private static BufferedImage qRCodeCommon(String content, String imgType, int size) { BufferedImage bufImg = null; 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('M'); qrcodeHandler.setQrcodeEncodeMode('B'); // 设置设置二维码尺寸,取值范围1-40,值越大尺寸越大,可存储的信息越大 qrcodeHandler.setQrcodeVersion(size); // 获得内容的字节数组,设置编码格式 byte[] contentBytes = content.getBytes("utf-8"); // 图片尺寸 int imgSize = 67 + 12 * (size - 1); bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); // 设置背景颜色 gs.setBackground(Color.WHITE); gs.clearRect(0, 0, imgSize, imgSize); // 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 { throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800]."); } gs.dispose(); bufImg.flush(); } catch (Exception e) { e.printStackTrace(); } return bufImg; } private static void file(byte[] out) throws IOException { String imageName = "F:/test.jpg"; FileOutputStream fileOutputStream = new FileOutputStream(new File(imageName)); fileOutputStream.write(out); fileOutputStream.close(); } public static void main(String[] args) throws IOException { String encoderContent = "http://www.baidu.com"; byte[] b = new QRCode().encoderQRCode(encoderContent,"jpg"); file(b); } }