zxing二维码的生成和解码

转载:http://andilyliao.iteye.com/blog/1102546

适用于j2se的方法
例子:

package snippet;

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.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Reader;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
  
public class TestEnDeCode {  
  
    /** 
     *  
     */  
    public TestEnDeCode() {  
        // TODO Auto-generated constructor stub  
    }  
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
        TestEnDeCode t=new TestEnDeCode();  
        t.encode();  
        t.decode();
    }  
  
    // 编码  
    public void encode() {  
        try {  
            String str = "小猪";// 二维码内容  
            String path = "hwy.png";  
            BitMatrix byteMatrix;  
            Hashtable hints = new Hashtable();  
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  
            byteMatrix = new MultiFormatWriter().encode(str,  
                    BarcodeFormat.QR_CODE, 200, 200,hints);  
            File file = new File(path);  
              
            MatrixToImageWriter.writeToFile(byteMatrix, "png", file);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    // 解码  
    public void decode() {  
        try {  
            Reader reader = new MultiFormatReader();  
            String imgPath = "hwy.png";  
            File file = new File(imgPath);  
            BufferedImage image;  
            try {  
                image = ImageIO.read(file);  
                if (image == null) {  
                    System.out.println("Could not decode image");  
                }  
                LuminanceSource source = new BufferedImageLuminanceSource(image);  
                BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(  
                        source));  
                Result result;  
                Hashtable hints = new Hashtable();  
                hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");  
                result = new MultiFormatReader().decode(bitmap, hints);  
                String resultStr = result.getText();  
                System.out.println(resultStr);  
  
            } catch (IOException ioe) {  
                System.out.println(ioe.toString());  
            } catch (ReaderException re) {  
                System.out.println(re.toString());  
            }  
  
        } catch (Exception ex) {  
  
        }  
    }  
  
}