Java实现二维码生成的代码方法

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; /** * 二维码生成工具类 * @author Cloud * @data 2016-12-15 * QRCode */ public class QRCodeUtil {  //二维码颜色 private static final int BLACK = 0xFF000000; //二维码颜色 private static final int WHITE = 0xFFFFFFFF;  /**  * <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二维码</span>  * @param text <a href="javascript:void();" rel="external nofollow" >二维码内容</a>  * @param width 二维码宽  * @param height 二维码高  * @param outPutPath 二维码生成保存路径  * @param imageType  二维码生成格式  */ public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType){  Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();  //设置编码字符集  his.put(EncodeHintType.CHARACTER_SET, "utf-8");  try {   //1、生成二维码   BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);      //2、获取二维码宽高   int codeWidth = encode.getWidth();   int codeHeight = encode.getHeight();      //3、将二维码放入缓冲流   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、循环将二维码内容定入图片     image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);    }   }   File outPutImage = new File(outPutPath);   //如果图片不存在创建图片   if(!outPutImage.exists())    outPutImage.createNewFile();   //5、将二维码写入图片   ImageIO.write(image, imageType, outPutImage);  } catch (WriterException e) {   e.printStackTrace();   System.out.println("二维码生成失败");  } catch (IOException e) {   e.printStackTrace();   System.out.println("生成二维码图片失败");  } }  /**  * <span style="font-size:18px;font-weight:blod;">二维码解析</span>  * @param analyzePath 二维码路径  * @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 "二维码不存在";   }   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 方式生成二维码</span>  * @param content 二维码内容  * @param imgPath 二维码生成路径  * @param version 二维码版本  * @param isFlag 是否生成Logo图片 为NULL不生成  */ public static void QRCodeCreate(String content, String imgPath, int version, String logoPath){   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');    //N代表数字,A代表字符a-Z,B代表其他字符    qrcodeHandler.setQrcodeEncodeMode('B');    //版本1为21*21矩阵，版本每增1，二维码的两个边长都增4；所以版本7为45*45的矩阵；最高版本为是40，是177*177的矩阵    qrcodeHandler.setQrcodeVersion(version);   //根据版本计算尺寸   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);    // 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 < 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 ]. ");    }   /* 判断是否需要添加logo图片 */   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图片不存在！");    }    }     gs.dispose();   bufImg.flush();   //创建二维码文件   File imgFile = new File(imgPath);   if(!imgFile.exists())    imgFile.createNewFile();   //根据生成图片获取图片   String imgType = imgPath.substring(imgPath.lastIndexOf(".") + 1, imgPath.length());   // 生成二维码QRCode图片    ImageIO.write(bufImg, imgType, imgFile);    } catch (Exception e) {     e.printStackTrace();    } }  /**  * <span style="font-size:18px;font-weight:blod;">QRCode二维码解析</span>  * @param codePath 二维码路径  * @return 解析结果  */ public static String QRCodeAnalyze(String codePath) {  File imageFile = new File(codePath);  BufferedImage bufImg = null;   String decodedData = null;   try {   if(!imageFile.exists())    return "二维码不存在";   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、最后贴测试代码： 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; /** * 二维码生成测试类 * @author Cloud * @data 2016-11-21 * QRCodeTest */ public class QRCodeTest {  public static void main(String[] args) throws Exception {  /**   * QRcode 二维码生成测试   * QRCodeUtil.QRCodeCreate("http://blog.csdn.net/u014266877", "E://qrcode.jpg", 15, "E://icon.png");   */  /**   *  QRcode 二维码解析测试   * String qrcodeAnalyze = QRCodeUtil.QRCodeAnalyze("E://qrcode.jpg");   */  /**   * ZXingCode 二维码生成测试   * QRCodeUtil.zxingCodeCreate("http://blog.csdn.net/u014266877", 300, 300, "E://zxingcode.jpg", "jpg");   */  /**   * ZxingCode 二维码解析   * String zxingAnalyze = QRCodeUtil.zxingCodeAnalyze("E://zxingcode.jpg").toString();   */  System.out.println("success"); }}