zxing 生成二维码，可设置logo、二维码颜色、白边大小

主要是使用google的zxing 生成二维码，可设置logo、二维码前景色/后景色、白边大小、二维码大小

1、用到jar包

<dependency>    <groupId>com.google.zxing</groupId>    <artifactId>core</artifactId>    <version>3.2.0</version></dependency><dependency>    <groupId>com.google.zxing</groupId>    <artifactId>javase</artifactId>    <version>3.1.0</version></dependency>

2、生成二维码参数类

/** * @copyright @2015-2016 Abel-Studio.All Rights Reserved */package com.abel.tools.qrcode;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * @description * @author Abel.lin * @date 2016年7月10日 下午4:41:41 */public class QRCodeParams {private String txt;                //二维码内容private String qrCodeUrl;          //二维码网络路径private String filePath;           //二维码生成物理路径private String fileName;           //二维码生成图片名称（包含后缀名）private String logoPath;           //logo图片private Integer width = 300;           //二维码宽度private Integer height = 300;          //二维码高度private Integer onColor = 0xFF000000;  //前景色private Integer offColor = 0xFFFFFFFF; //背景色private Integer margin = 1;            //白边大小，取值范围0~4private ErrorCorrectionLevel level = ErrorCorrectionLevel.L;  //二维码容错率public String getTxt() {return txt;}public void setTxt(String txt) {this.txt = txt;}public String getFilePath() {return filePath;}public void setFilePath(String filePath) {this.filePath = filePath;}public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public Integer getWidth() {return width;}public void setWidth(Integer width) {this.width = width;}public Integer getHeight() {return height;}public void setHeight(Integer height) {this.height = height;}public String getQrCodeUrl() {return qrCodeUrl;}public void setQrCodeUrl(String qrCodeUrl) {this.qrCodeUrl = qrCodeUrl;}public String getLogoPath() {return logoPath;}public void setLogoPath(String logoPath) {this.logoPath = logoPath;}public Integer getOnColor() {return onColor;}public void setOnColor(Integer onColor) {this.onColor = onColor;}public Integer getOffColor() {return offColor;}public void setOffColor(Integer offColor) {this.offColor = offColor;}public ErrorCorrectionLevel getLevel() {return level;}public void setLevel(ErrorCorrectionLevel level) {this.level = level;}/** * 返回文件后缀名 * @return */public String getSuffixName(){String imgName = this.getFileName();if(imgName != null && !"".equals(imgName)){String suffix=fileName.substring(fileName.lastIndexOf(".")+1);return suffix;}return "";}public Integer getMargin() {return margin;}public void setMargin(Integer margin) {this.margin = margin;}}

3、生成二维码工具类

/** * @copyright @2015-2016 Abel-Studio.All Rights Reserved */package com.abel.tools.qrcode;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.Hashtable;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.client.j2se.MatrixToImageConfig;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * @description * @author Abel.lin * @date 2016年7月10日 下午4:41:41 */public class QRCodeUtil {private static int width = 300;              //二维码宽度private static int height = 300;             //二维码高度private static int onColor = 0xFF000000;     //前景色private static int offColor = 0xFFFFFFFF;    //背景色private static int margin = 1;               //白边大小，取值范围0~4private static ErrorCorrectionLevel level = ErrorCorrectionLevel.L;  //二维码容错率        /**     * 生成二维码     * @param params     * QRCodeParams属性：txt、fileName、filePath不得为空；     * @throws QRParamsException     */    public static void generateQRImage(QRCodeParams params)throws QRParamsException{    if(params == null|| params.getFileName() == null|| params.getFilePath() == null|| params.getTxt() == null){throw new QRParamsException("参数错误");}    try{    initData(params);                String imgPath = params.getFilePath();              String imgName = params.getFileName();             String txt = params.getTxt();                        if(params.getLogoPath() != null && !"".equals(params.getLogoPath().trim())){            generateQRImage(txt, params.getLogoPath(), imgPath, imgName, params.getSuffixName());            }else{            generateQRImage(txt, imgPath, imgName, params.getSuffixName());            }    }catch(Exception e){    e.printStackTrace();    }                }    /** * 生成二维码 * @param txt          //二维码内容 * @param imgPath      //二维码保存物理路径 * @param imgName      //二维码文件名称 * @param suffix       //图片后缀名 */public static void generateQRImage(String txt, String imgPath, String imgName, String suffix){                   File filePath = new File(imgPath);        if(!filePath.exists()){        filePath.mkdirs();        }                File imageFile = new File(imgPath,imgName);        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();          // 指定纠错等级          hints.put(EncodeHintType.ERROR_CORRECTION, level);          // 指定编码格式          hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");         hints.put(EncodeHintType.MARGIN, margin);   //设置白边        try {          MatrixToImageConfig config = new MatrixToImageConfig(onColor, offColor);        BitMatrix bitMatrix = new MultiFormatWriter().encode(txt,BarcodeFormat.QR_CODE, width, height, hints);  //        bitMatrix = deleteWhite(bitMatrix);        MatrixToImageWriter.writeToPath(bitMatrix, suffix, imageFile.toPath(), config);          } catch (Exception e) {              e.printStackTrace();          }      }    /**     * 生成带logo的二维码图片      * @param txt          //二维码内容     * @param logoPath     //logo绝对物理路径 * @param imgPath      //二维码保存绝对物理路径 * @param imgName      //二维码文件名称 * @param suffix       //图片后缀名     * @throws Exception     */    public static void generateQRImage(String txt, String logoPath, String imgPath, String imgName, String suffix) throws Exception{           File filePath = new File(imgPath);        if(!filePath.exists()){        filePath.mkdirs();        }                if(imgPath.endsWith("/")){        imgPath += imgName;        }else{        imgPath += "/"+imgName;        }                Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();           hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            hints.put(EncodeHintType.ERROR_CORRECTION, level);          hints.put(EncodeHintType.MARGIN, margin);  //设置白边        BitMatrix bitMatrix = new MultiFormatWriter().encode(txt, BarcodeFormat.QR_CODE, width, height, hints);          File qrcodeFile = new File(imgPath);            writeToFile(bitMatrix, suffix, qrcodeFile, logoPath);        }            /**      *       * @param matrix 二维码矩阵相关      * @param format 二维码图片格式      * @param file 二维码图片文件      * @param logoPath logo路径      * @throws IOException      */      public static void writeToFile(BitMatrix matrix,String format,File file,String logoPath) throws IOException {          BufferedImage image = toBufferedImage(matrix);          Graphics2D gs = image.createGraphics();                   int ratioWidth = image.getWidth()*2/10;        int ratioHeight = image.getHeight()*2/10;        //载入logo          Image img = ImageIO.read(new File(logoPath));         int logoWidth = img.getWidth(null)>ratioWidth?ratioWidth:img.getWidth(null);        int logoHeight = img.getHeight(null)>ratioHeight?ratioHeight:img.getHeight(null);                int x = (image.getWidth() - logoWidth) / 2;         int y = (image.getHeight() - logoHeight) / 2;                gs.drawImage(img, x, y, logoWidth, logoHeight, null);         gs.setColor(Color.black);        gs.setBackground(Color.WHITE);        gs.dispose();          img.flush();          if(!ImageIO.write(image, format, file)){              throw new IOException("Could not write an image of format " + format + " to " + file);            }      }            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) ? onColor : offColor);              }          }          return image;         }         public static BitMatrix deleteWhite(BitMatrix matrix){          int[] rec = matrix.getEnclosingRectangle();          int resWidth = rec[2] + 1;          int resHeight = rec[3] + 1;                BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);          resMatrix.clear();          for (int i = 0; i < resWidth; i++) {              for (int j = 0; j < resHeight; j++) {                  if (matrix.get(i + rec[0], j + rec[1]))                      resMatrix.set(i, j);              }          }          return resMatrix;      }         private static void initData(QRCodeParams params){    if(params.getWidth() != null){    width = params.getWidth();    }    if(params.getHeight() != null){    height = params.getHeight();    }    if(params.getOnColor() != null){    onColor = params.getOnColor();    }    if(params.getOffColor() != null){    offColor = params.getOffColor();    }    if(params.getLevel() != null){    level = params.getLevel();    }        }}

4、自定义异常类

/** * @copyright @2015-2016 Abel-Studio.All Rights Reserved */package com.abel.tools.qrcode;/** * @description * @author Abel.lin * @date 2016年7月10日 下午4:41:41 */public class QRParamsException extends Exception {private static final long serialVersionUID = 8837582301762730656L;public QRParamsException()  {}                //用来创建无参数对象    public QRParamsException(String message) {        //用来创建指定参数对象        super(message);                             //调用超类构造器    }}

项目源码下载：http://download.csdn.net/detail/rongku/9572265