java生成二維碼
/*** */ package com.spg.test; /** * 項目名稱：weixinpay * * @description:二維碼生成<br> * 注意生成二維碼和解析過程中的編碼必須為GBK，否則解析過程會出錯。 * * @author spg * * @create_time：2014年5月20日 上午11:26:27 * * @version V1.0.0 * */ import java.awt.Color; import java.awt.Graphics2D; import java.awt.Image; import java.awt.geom.AffineTransform; import java.awt.image.AffineTransformOp; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; 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.Result; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; public class QRCodeUtil { /** * 二維碼寬高度默認200 */ private static final int DEFAULT_IMAGE_WIDTH = 300; private static final int DEFAULT_IMAGE_HEIGHT = 300; /** * 生成帶圖片二維碼時內部圖片大小 */ private static final int INNER_IMAGE_WIDTH = 60; private static final int INNER_IMAGE_HEIGHT = 60; private static final int IMAGE_HALF_WIDTH = INNER_IMAGE_WIDTH / 2; private static final int FRAME_WIDTH = 2; /** * 生成普通二維碼 * * @param contents 內容 * @param width 二維碼寬度，如果小于0，則按默認大小生成 * @param height 二維碼高度，如果小于0，則按默認大小生成 * @param imgPath 生成后的文件完整存放路徑，包含文件名。形如D:\aa.jpg */ public static void encodePR(String contents, int width, int height, String imgPath) { Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); // 指定糾錯等級 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); // 指定編碼格式 hints.put(EncodeHintType.CHARACTER_SET, "GBK"); if (width <= 0 || height <= 0) { width = DEFAULT_IMAGE_WIDTH; height = DEFAULT_IMAGE_HEIGHT; } try { BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints); MatrixToImageWriter.writeToStream(bitMatrix, "jpg", new FileOutputStream(imgPath)); } catch (Exception e) { e.printStackTrace(); } } /** * 生成帶圖片的二維碼 * * @param content * @param width * @param height * @param srcImagePath * @param destImagePath */ public static void encodePR(String content, int width, int height, String srcImagePath, String destImagePath) { try { ImageIO.write(genBarcode(content, width, height, srcImagePath), "jpg", new File(destImagePath)); } catch (IOException e) { e.printStackTrace(); } catch (WriterException e) { e.printStackTrace(); } } /** * 針對二維碼進行解析 * * @param imgPath 二維碼文件路徑 * @return */ public static String decodePR(String imgPath) { BufferedImage image = null; Result result = null; try { image = ImageIO.read(new File(imgPath)); if (image == null) { throw new RuntimeException("the decode image may be not exists."); } LuminanceSource source = new BufferedImageLuminanceSource(image); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "GBK"); result = new MultiFormatReader().decode(bitmap, hints); return result.getText(); } catch (Exception e) { e.printStackTrace(); } return null; } /** * 創建條形碼 * * @param contents * @param width * @param height * @param imgPath */ public static void encodeBar(String contents, int width, int height, String imgPath) { // 條形碼的最小寬度 int codeWidth = 98; codeWidth = Math.max(codeWidth, width); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.EAN_13, codeWidth, height, null); MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(imgPath)); } catch (Exception e) { e.printStackTrace(); } } /** * 針對條形碼進行解析 * * @param imgPath * @return */ public static String decodeBar(String imgPath) { BufferedImage image = null; Result result = null; try { image = ImageIO.read(new File(imgPath)); if (image == null) { System.out.println("the decode image may be not exit."); } LuminanceSource source = new BufferedImageLuminanceSource(image); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); result = new MultiFormatReader().decode(bitmap, null); return result.getText(); } catch (Exception e) { e.printStackTrace(); } return null; } /** * 把傳入的原始圖像按高度和寬度進行縮放，生成符合要求的圖標 * * @param srcImageFile * 源文件地址 * @param height * 目標高度 * @param width * 目標寬度 * @param hasFiller * 比例不對時是否需要補白：true為補白; false為不補白; * @throws IOException */ private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller) throws IOException { double ratio = 0.0; // 縮放比例 File file = new File(srcImageFile); BufferedImage srcImage = ImageIO.read(file); Image destImage = srcImage.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH); // 計算比例 if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) { if (srcImage.getHeight() > srcImage.getWidth()) { ratio = (new Integer(height)).doubleValue() / srcImage.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / srcImage.getWidth(); } AffineTransformOp op = new AffineTransformOp( AffineTransform.getScaleInstance(ratio, ratio), null); destImage = op.filter(srcImage, null); } if (hasFiller) {// 補白 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D graphic = image.createGraphics(); graphic.setColor(Color.white); graphic.fillRect(0, 0, width, height); if (width == destImage.getWidth(null)) graphic.drawImage(destImage, 0, (height - destImage.getHeight(null)) / 2, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); else graphic.drawImage(destImage, (width - destImage.getWidth(null)) / 2, 0, destImage.getWidth(null), destImage.getHeight(null), Color.white, null); graphic.dispose(); destImage = image; } return (BufferedImage) destImage; } /** * 產生帶有圖片的二維碼緩沖圖像 * * @param content * @param width * @param height * @param srcImagePath * @return * @throws WriterException * @throws IOException */ private static BufferedImage genBarcode(String content, int width, int height, String srcImagePath) throws WriterException, IOException { // 讀取源圖像 BufferedImage scaleImage = scale(srcImagePath, INNER_IMAGE_WIDTH, INNER_IMAGE_HEIGHT, true); int[][] srcPixels = new int[INNER_IMAGE_WIDTH][INNER_IMAGE_HEIGHT]; for (int i = 0; i < scaleImage.getWidth(); i++) { for (int j = 0; j < scaleImage.getHeight(); j++) { srcPixels[i][j] = scaleImage.getRGB(i, j); } } Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>(); hint.put(EncodeHintType.CHARACTER_SET, "GBK"); hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 生成二維碼 MultiFormatWriter mutiWriter = new MultiFormatWriter(); BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hint); // 二維矩陣轉為一維像素數組 int halfW = matrix.getWidth() / 2; int halfH = matrix.getHeight() / 2; int[] pixels = new int[width * height]; for (int y = 0; y < matrix.getHeight(); y++) { for (int x = 0; x < matrix.getWidth(); x++) { // 讀取圖片 if (x > halfW - IMAGE_HALF_WIDTH && x < halfW + IMAGE_HALF_WIDTH && y > halfH - IMAGE_HALF_WIDTH && y < halfH + IMAGE_HALF_WIDTH) { pixels[y * width + x] = srcPixels[x - halfW + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH]; } // 在圖片四周形成邊框 else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH - IMAGE_HALF_WIDTH + FRAME_WIDTH) || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH + IMAGE_HALF_WIDTH + FRAME_WIDTH)) { pixels[y * width + x] = 0xfffffff; } else { // 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色； pixels[y * width + x] = matrix.get(x, y) ? 0xff000000 : 0xfffffff; } } } BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); image.getRaster().setDataElements(0, 0, width, height, pixels); return image; } public static void main(String[] args) { String imgPath = "d:/pr1.jpg"; String contents = "你好,李四! welcome to zxing!" + "\n李四的博客[http://my.oschina.net/cloudcoder]" + "\nEmail[xxx@163.com]"; // 普通二維碼的生成與解析 QRCodeUtil.encodePR(contents, 0, 10, imgPath); System.out.println("生成二維碼成功"); System.out.println(QRCodeUtil.decodePR(imgPath)); // 帶圖片的二維的生成與解析 imgPath = "d:/pr2.png"; String srcPath = "d:/src.jpg"; QRCodeUtil.encodePR(contents, 300, 300, srcPath, imgPath); System.out.println("生成帶圖片的二維碼成功"); System.out.println(QRCodeUtil.decodePR(imgPath)); // 條形碼的生成與解析 imgPath = "d:/bar.png"; QRCodeUtil.encodeBar("6923450657713", 105, 50, imgPath); System.out.println("生成條形碼成功"); System.out.println(QRCodeUtil.decodeBar(imgPath)); } } </pre>
注意：如果使用JDK1.7版本，jar包的maven庫為：<dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.0.1</version> </dependency>
但是如果使用JDK1.6一下版本編譯，用以上jar包會報錯，改用2.2版本jar包可解決。
zxing2.2.jar下載地址：http://download.csdn.net/detail/fengspg/7378425
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