Java實現二維碼生成的代碼方法

1、支持QRcode、ZXing 二維碼生成、解析；

2、QRCode 方式生成二維碼支持添加圖片，如下：

 package common; 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.util.HashMap;import java.util.Map; import javax.imageio.ImageIO; import jp.sourceforge.qrcode.QRCodeDecoder;import jp.sourceforge.qrcode.exception.DecodingFailedException; import com.google.zxing.BarcodeFormat;import com.google.zxing.Binarizer;import com.google.zxing.BinaryBitmap;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.NotFoundException;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.swetake.util.Qrcode; /** * 二維碼生成工具類* @author Cloud * @data 2016-12-15 * QRCode */ public class QRCodeUtil { //二維碼顏色private static final int BLACK = 0xFF000000; //二維碼顏色private static final int WHITE = 0xFFFFFFFF; /** * <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二維碼</span> * @param text <a href="javascript:void();" rel="external nofollow" >二維碼內容</a> * @param width 二維碼寬* @param height 二維碼高* @param outPutPath 二維碼生成保存路徑* @param imageType 二維碼生成格式*/ public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType){ Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>(); //設置編碼字符集his.put(EncodeHintType.CHARACTER_SET, "utf-8"); try { //1、生成二維碼BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his); //2、獲取二維碼寬高int codeWidth = encode.getWidth(); int codeHeight = encode.getHeight(); //3、將二維碼放入緩衝流BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB); for (int i = 0; i < codeWidth; i++) { for (int j = 0; j < codeHeight; j++) { //4、循環將二維碼內容定入圖片image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE); } } File outPutImage = new File(outPutPath); //如果圖片不存在創建圖片if(!outPutImage.exists()) outPutImage.createNewFile(); //5、將二維碼寫入圖片ImageIO.write(image, imageType, outPutImage); } catch (WriterException e) { e.printStackTrace(); System.out.println("二維碼生成失敗"); } catch (IOException e) { e.printStackTrace(); System.out.println("生成二維碼圖片失敗"); } } /** * <span style="font-size:18px;font-weight:blod;">二維碼解析</span> * @param analyzePath 二維碼路徑* @return * @throws IOException */ @SuppressWarnings({ "rawtypes", "unchecked" }) public static Object zxingCodeAnalyze(String analyzePath) throws Exception{ MultiFormatReader formatReader = new MultiFormatReader(); Object result = null; try { File file = new File(analyzePath); if (!file.exists()) { return "二維碼不存在"; } BufferedImage image = ImageIO.read(file); LuminanceSource source = new LuminanceSourceUtil(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map hints = new HashMap(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); result = formatReader.decode(binaryBitmap, hints); } catch (NotFoundException e) { e.printStackTrace(); } return result; } /** * <span style="font-size:18px;font-weight:blod;">QRCode 方式生成二維碼</span> * @param content 二維碼內容* @param imgPath 二維碼生成路徑* @param version 二維碼版本* @param isFlag 是否生成Logo圖片為NULL不生成*/ public static void QRCodeCreate(String content, String imgPath, int version, String logoPath){ try { Qrcode qrcodeHandler = new Qrcode(); //設置二維碼排錯率，可選L(7%) M(15%) Q(25%) H(30%)，排錯率越高可存儲的信息越少，但對二維碼清晰度的要求越小qrcodeHandler.setQrcodeErrorCorrect('M'); //N代表數字,A代表字符aZ,B代表其他字符qrcodeHandler.setQrcodeEncodeMode('B'); //版本1為21*21矩陣，版本每增1，二維碼的兩個邊長都增4；所以版本7為45*45的矩陣；最高版本為是40，是177*177的矩陣qrcodeHandler.setQrcodeVersion(version); //根據版本計算尺寸int imgSize = 67 + 12 * (version - 1) ; byte[] contentBytes = content.getBytes("gb2312"); BufferedImage bufImg = new BufferedImage(imgSize , imgSize ,BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, imgSize , imgSize); // 設定圖像顏色> BLACK gs.setColor(Color.BLACK); // 設置偏移量不設置可能導致解析出錯int pixoff = 2; // 輸出內容> 二維碼if (contentBytes.length > 0 && contentBytes.length < 130) { 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 [ 0,130 ]. "); } /* 判斷是否需要添加logo圖片*/ if(logoPath != null){ File icon = new File(logoPath); if(icon.exists()){ int width_4 = imgSize / 4; int width_8 = width_4 / 2; int height_4 = imgSize / 4; int height_8 = height_4 / 2; Image img = ImageIO.read(icon); gs.drawImage(img, width_4 + width_8, height_4 + height_8,width_4,height_4, null); gs.dispose(); bufImg.flush(); }else{ System.out.println("Error: login圖片不存在！"); } } gs.dispose(); bufImg.flush(); //創建二維碼文件File imgFile = new File(imgPath); if(!imgFile.exists()) imgFile.createNewFile(); //根據生成圖片獲取圖片String imgType = imgPath.substring(imgPath.lastIndexOf(".") + 1, imgPath.length()); // 生成二維碼QRCode圖片ImageIO.write(bufImg, imgType, imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * <span style="font-size:18px;font-weight:blod;">QRCode二維碼解析</span> * @param codePath 二維碼路徑* @return 解析結果*/ public static String QRCodeAnalyze(String codePath) { File imageFile = new File(codePath); BufferedImage bufImg = null; String decodedData = null; try { if(!imageFile.exists()) return "二維碼不存在"; bufImg = ImageIO.read(imageFile); QRCodeDecoder decoder = new QRCodeDecoder(); decodedData = new String(decoder.decode(new ImageUtil(bufImg)), "gb2312"); } catch (IOException e) { System.out.println("Error: " + e.getMessage()); e.printStackTrace(); } catch (DecodingFailedException dfe) { System.out.println("Error: " + dfe.getMessage()); dfe.printStackTrace(); } return decodedData; } } 3、最後貼測試代碼： package test; import java.awt.image.BufferedImage;import java.io.InputStream;import java.net.URL; import javax.imageio.ImageIO; import common.ImageUtil;import common.QRCodeUtil; import jp.sourceforge.qrcode.QRCodeDecoder; /** * 二維碼生成測試類* @author Cloud * @data 2016-11-21 * QRCodeTest */ public class QRCodeTest { public static void main(String[] args) throws Exception { /** * QRcode 二維碼生成測試* QRCodeUtil.QRCodeCreate("http://blog.csdn.net/u014266877", "E://qrcode.jpg", 15, "E://icon.png"); */ /** * QRcode 二維碼解析測試* String qrcodeAnalyze = QRCodeUtil.QRCodeAnalyze("E://qrcode.jpg"); */ /** * ZXingCode 二維碼生成測試* QRCodeUtil.zxingCodeCreate("http://blog.csdn.net/u014266877", 300, 300, "E://zxingcode.jpg", "jpg"); */ /** * ZxingCode 二維碼解析* String zxingAnalyze = QRCodeUtil.zxingCodeAnalyze("E://zxingcode.jpg").toString(); */ System.out.println("success"); }}