生成二维码图片

导包:QRCode.jar

main

TwoDimensionCode handler = new TwoDimensionCode();
String path=this.getClass().getClassLoader().getResource("/conf/upload.properties").getFile();
String imagesPath=PropertiesUtil.getPropertiesValues(path, "upload.images");
//生成二维码
 handler.encoderQRCode(exchange.getNumber(), imagesPath+"app/orderCode/"+exchange.getOrderid()+"/"+exchange.getNumber()+".png", "png");  //二维码图片地址

TwoDimensionCode.java

import java.awt.Color;  
import java.awt.Graphics2D;  
import java.awt.image.BufferedImage;  
import java.io.File;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
  
import javax.imageio.ImageIO;  
  
import jp.sourceforge.qrcode.QRCodeDecoder;  
import jp.sourceforge.qrcode.exception.DecodingFailedException;  
  
import com.swetake.util.Qrcode;  
  
public class TwoDimensionCode {  
      
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param imgPath 图片路径 
     */  
    public void encoderQRCode(String content, String imgPath) {  
        this.encoderQRCode(content, imgPath, "png", 7);  
    }  
      
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param output 输出流 
     */  
    public void encoderQRCode(String content, OutputStream output) {  
        this.encoderQRCode(content, output, "png", 7);  
    }  
      
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param imgPath 图片路径 
     * @param imgType 图片类型 
     */  
    public void encoderQRCode(String content, String imgPath, String imgType) {  
        this.encoderQRCode(content, imgPath, imgType, 7);  
    }  
      
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param output 输出流 
     * @param imgType 图片类型 
     */  
    public void encoderQRCode(String content, OutputStream output, String imgType) {  
        this.encoderQRCode(content, output, imgType, 7);  
    }  
  
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param imgPath 图片路径 
     * @param imgType 图片类型 
     * @param size 二维码尺寸 
     */  
    public void encoderQRCode(String content, String imgPath, String imgType, int size) {  
        try {  
            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  
              
            File imgFile = new File(imgPath); 
            if(!imgFile.getParentFile().exists()){
                imgFile.getParentFile().mkdirs();
            }
            if(!imgFile.exists()){
                imgFile.createNewFile();
            }
            // 生成二维码QRCode图片  
            ImageIO.write(bufImg, imgType, imgFile);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    /** 
     * 生成二维码(QRCode)图片 
     * @param content 存储内容 
     * @param output 输出流 
     * @param imgType 图片类型 
     * @param size 二维码尺寸 
     */  
    public void encoderQRCode(String content, OutputStream output, String imgType, int size) {  
        try {  
            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  
            // 生成二维码QRCode图片  
            ImageIO.write(bufImg, imgType, output);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
      
    /** 
     * 生成二维码(QRCode)图片的公共方法 
     * @param content 存储内容 
     * @param imgType 图片类型 
     * @param size 二维码尺寸 
     * @return 
     */  
    private BufferedImage qRCodeCommon(String content, String imgType, int size) {  
        BufferedImage bufImg = null;  
        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');  
            qrcodeHandler.setQrcodeEncodeMode('B');  
            // 设置设置二维码尺寸,取值范围1-40,值越大尺寸越大,可存储的信息越大  
            qrcodeHandler.setQrcodeVersion(size);  
            // 获得内容的字节数组,设置编码格式  
            byte[] contentBytes = content.getBytes("utf-8");  
            // 图片尺寸  
            int imgSize = 67 + 12 * (size - 1);  
            bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB);  
            Graphics2D gs = bufImg.createGraphics();  
            // 设置背景颜色  
            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 < 800) {  
                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 {  
                throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800].");  
            }  
            gs.dispose();  
            bufImg.flush();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return bufImg;  
    }  
      
    /** 
     * 解析二维码(QRCode) 
     * @param imgPath 图片路径 
     * @return 
     */  
    public String decoderQRCode(String imgPath) {  
        // QRCode 二维码图片的文件  
        File imageFile = new File(imgPath);  
        BufferedImage bufImg = null;  
        String content = null;  
        try {  
            bufImg = ImageIO.read(imageFile);  
            QRCodeDecoder decoder = new QRCodeDecoder();  
            content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");   
        } catch (IOException e) {  
            System.out.println("Error: " + e.getMessage());  
            e.printStackTrace();  
        } catch (DecodingFailedException dfe) {  
            System.out.println("Error: " + dfe.getMessage());  
            dfe.printStackTrace();  
        }  
        return content;  
    }  
      
    /** 
     * 解析二维码(QRCode) 
     * @param input 输入流 
     * @return 
     */  
    public String decoderQRCode(InputStream input) {  
        BufferedImage bufImg = null;  
        String content = null;  
        try {  
            bufImg = ImageIO.read(input);  
            QRCodeDecoder decoder = new QRCodeDecoder();  
            content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");   
        } catch (IOException e) {  
            System.out.println("Error: " + e.getMessage());  
            e.printStackTrace();  
        } catch (DecodingFailedException dfe) {  
            System.out.println("Error: " + dfe.getMessage());  
            dfe.printStackTrace();  
        }  
        return content;  
    }  
  
    public static void main(String[] args) {  
        String imgPath = "f:/xxxxx.png";  
        //String encoderContent = "Hello 大大、小小,welcome to QRCode!" + "\nMyblog [ http://sjsky.iteye.com ]" + "\nEMail [ [email protected] ]";  
        String encoderContent = "111";
        TwoDimensionCode handler = new TwoDimensionCode();  
        handler.encoderQRCode(encoderContent, imgPath, "png");  
//      try {  
//          OutputStream output = new FileOutputStream(imgPath);  
//          handler.encoderQRCode(content, output);  
//      } catch (Exception e) {  
//          e.printStackTrace();  
//      }  
        System.out.println("========encoder success");  
          
          
        String decoderContent = handler.decoderQRCode(imgPath);  
        System.out.println("解析结果如下:");  
        System.out.println(decoderContent);  
        System.out.println("========decoder success!!!");  
    }  
}  

TwoDimensionCodeImage.java

import java.awt.image.BufferedImage;  

import jp.sourceforge.qrcode.data.QRCodeImage;  
  
public class TwoDimensionCodeImage implements QRCodeImage {  
  
    BufferedImage bufImg;  
      
    public TwoDimensionCodeImage(BufferedImage bufImg) {  
        this.bufImg = bufImg;  
    }

    public int getHeight() {
        // TODO Auto-generated method stub
        return bufImg.getHeight(); 
    }

    public int getPixel(int x, int y) {
        // TODO Auto-generated method stub
        return bufImg.getRGB(x, y);
    }

    public int getWidth() {
        // TODO Auto-generated method stub
        return bufImg.getWidth(); 
    }  
      
//    @Override  
//    public int getHeight() {  
//        return bufImg.getHeight();  
//    }  
//  
//    @Override  
//    public int getPixel(int x, int y) {  
//        return bufImg.getRGB(x, y);  
//    }  
//  
//    @Override  
//    public int getWidth() {  
//        return bufImg.getWidth();  
//    }  
  
}  

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