zxing 生成二维码，可设置logo、二维码颜色、白边大小

ゞ浴缸里的玫瑰 2021-06-24 15:59 1144阅读 0赞

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0~4
    	private 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0~4
    	private 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
        }
    }