条形码和二维码编码解码

package com.jeeplus.common.utils;


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.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.Result;
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;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;


/**
 * 条形码和二维码编码解码
 * 
 * @author jeeplus
 * @version 2014-02-28
 */
public class ZxingHandler {


/**
* 条形码编码
* 
* @param contents
* @param width
* @param height
* @param imgPath
*/
public static void encode(String contents, int width, int height, String imgPath) {
int codeWidth = 3 + // start guard
(7 * 6) + // left bars
5 + // middle guard
(7 * 6) + // right bars
3; // end guard
codeWidth = Math.max(codeWidth, width);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.EAN_13, codeWidth, height, null);


MatrixToImageWriter
.writeToFile(bitMatrix, "png", new File(imgPath));


} catch (Exception e) {
e.printStackTrace();
}
}


/**
* 条形码解码
* 
* @param imgPath
* @return String
*/
public static String decode(String imgPath) {
BufferedImage image = null;
Result result = null;
try {
image = ImageIO.read(new File(imgPath));
if (image == null) {
System.out.println("the decode image may be not exit.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));


result = new MultiFormatReader().decode(bitmap, null);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 二维码编码
* 
* @param contents
* @param width
* @param height
* @param imgPath
*/
public static void encode2(String contents, int width, int height, String imgPath) {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
// 指定编码格式
hints.put(EncodeHintType.CHARACTER_SET, "GBK");
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.QR_CODE, width, height, hints);


MatrixToImageWriter
.writeToFile(bitMatrix, "png", new File(imgPath));


} catch (Exception e) {
e.printStackTrace();
}
}


/**
* 二维码解码
* 
* @param imgPath
* @return String
*/
public static String decode2(String imgPath) {
BufferedImage image = null;
Result result = null;
try {
image = ImageIO.read(new File(imgPath));
if (image == null) {
System.out.println("the decode image may be not exit.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));


Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "GBK");


result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}


/**
* @param args
*/
public static void main(String[] args) {


// 条形码
String imgPath = "target\\zxing_EAN13.png";
String contents = "6923450657713";
int width = 105, height = 50;

ZxingHandler.encode(contents, width, height, imgPath);
System.out.println("finished zxing EAN-13 encode.");


String decodeContent = ZxingHandler.decode(imgPath);
System.out.println("解码内容如下：" + decodeContent);
System.out.println("finished zxing EAN-13 decode.");

// 二维码
String imgPath2 = "target\\zxing.png";
String contents2 = "Hello Gem, welcome to Zxing!"
+ "\nBlog [ http://jeeplus.iteye.com ]"
+ "\nEMail [ [email protected] ]";
int width2 = 300, height2 = 300;


ZxingHandler.encode2(contents2, width2, height2, imgPath2);
System.out.println("finished zxing encode.");


String decodeContent2 = ZxingHandler.decode2(imgPath2);
System.out.println("解码内容如下：" + decodeContent2);
System.out.println("finished zxing decode.");

}
    
}