使用Zxing生成和解析QRCODE

以下位置可以下載zxing(Code License：Apache License 2.0):

http://code.google.com/p/zxing/downloads/list

我下載的是Zxing-1.7.zip

1、安裝JDK

2、編譯ZXing

    可以參照Google的手冊進行編譯

　　http://code.google.com/p/zxing/wiki/GettingStarted

3、找到編譯好的core.jar和javase.jar備用

    （這兩個文件主要用於PC開發，如果需要在Android上開發的話，需要編譯相應的Source）

4、測試QRcode的生成和解碼

 

package com.dalian.qrcode.test;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;

import javax.imageio.ImageIO; 

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;

import com.google.zxing.DecodeHintType; 
import com.google.zxing.LuminanceSource; 
import com.google.zxing.MultiFormatReader; 
import com.google.zxing.Result; 
import com.google.zxing.client.j2se.BufferedImageLuminanceSource; 
import com.google.zxing.common.HybridBinarizer;

public class QRcoder {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        encode();
        decode();
    }
    
    static void encode(){
        try{
            //String str = "http://www.cnblogs.com/tompandas";
            
            StringBuilder sb = new StringBuilder(1024);
            sb.append("Name:TomPandas");
            sb.append("\r\n");
            sb.append("WebSite:http://www.cnblogs.com/tompandas");
            sb.append("\r\n");            
            String str = sb.toString();
            
            String picFormat = "png";
            String path = "d:/test_qrcode";
            File file = new File(path + "." + picFormat);
            str = new String(str.getBytes("GBK"), "ISO-8859-1");
            Hashtable hints = new Hashtable();
            BitMatrix bitMatrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, 200, 200, hints);
            MatrixToImageWriter.writeToFile(bitMatrix, picFormat, file);
            
        }catch(Exception ex){
            System.out.println(ex.toString());
        }
    }
    
    static void decode(){
        try{
            String file = "d:/test_qrcode.png";
            Result result = null; 
            BufferedImage image = null;
            
            image = ImageIO.read(new File(file));
            LuminanceSource source = new BufferedImageLuminanceSource(image); 
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); 
            Hashtable<Object, Object> hints = new Hashtable<Object, Object>(); 
            hints.put(DecodeHintType.CHARACTER_SET, "GBK"); 
 
            result = new MultiFormatReader().decode(bitmap, hints); 
            String rtn = result.getText();
            System.out.println(rtn);
            
        }catch(Exception ex){
            System.out.println(ex.toString());
        }
    }

}

 

以下是生成的文件

 

 

如果中文有亂碼的話，請參照以下試試，反正我沒試過。

源代碼中有兩處UTF-8的問題，會導致亂碼，

其一：com.google.zxing.qrcode.encoder.encoder類中的

internal const System.String DEFAULT_BYTE_MODE_ENCODING = "ISO-8859-1";

此處，將ISO-8859-1改為UTF-8

其二：com.google.zxing.qrcode.decoder.DecodedBitStreamParser類的成員

private const System.String UTF8 = "UTF8";

應將UTF8改為UTF-8