Google开源项目ZXing（二维条码编解码）简单使用（Java版）

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

ZXing (pronounced "zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages. Our focus is on using the built-in camera on mobile phones to scan and decode barcodes on the device, without communicating with a server. However the project can be used to encode and decode barcodes on desktops and servers as well. 

ZXing项目是google code上面提供的一个关于条码编解码的开源项目。

要对本项目进行二次开发，首先你需要在源码下载列表中下载ZXing1.7.zip源代码

解压文件，你会看到里面有很多文件夹，包括J2SE的，Android的，J2ME，C#等等。我们以J2SE为例。

你需要使用里面的Core和J2SE文件夹。然后导入到你在Eclipse中创建的工程，目录形式如下：

J2SE包中，提供了编码和解码的.Java文件，但是由于写的过于复杂，还没弄清楚这个开源项目源码之前，还是不推荐使用。

自己在j2se包中创建两个Java文件Encoder和Decoder。代码如下：

package com.google.zxing.client.j2se;

import java.io.File;
import java.io.IOException;
import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

public class Encoder {

	public static void main(String[] args) {

		String contents = "今天，我们来简单聊聊google开源项目——ZXing（二维条码编解码）";

		Hashtable hints = new Hashtable();

		hints.put(EncodeHintType.CHARACTER_SET, "GBK");

		BitMatrix matrix = null;

		try {

			matrix = new MultiFormatWriter().encode(contents,
					BarcodeFormat.QR_CODE, 300, 300, hints);

		} catch (WriterException e) {

			e.printStackTrace();

		}

		File file = new File("D://qrcodeImage.png");

		try {

			MatrixToImageWriter.writeToFile(matrix, "png", file);

		} catch (IOException e) {

			e.printStackTrace();

		}

	}
}

package com.google.zxing.client.j2se;

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.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;

public class Decoder {
	
	public static void main(String[] args) {

		File file = new File("D://qrcodeImage.png");

		BufferedImage bufferedImage = null;

		try {

			bufferedImage = ImageIO.read(file);

		} catch (IOException e) {

			e.printStackTrace();

		}

		LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);

		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

		Hashtable hints = new Hashtable();

		hints.put(DecodeHintType.CHARACTER_SET, "GBK");

		Result result = null;

		try {

			result = new MultiFormatReader().decode(bitmap, hints);

		} catch (NotFoundException e) {

			e.printStackTrace();

		}

		System.out.println(result.toString());

	}

}

之后你就可以开始进行条码编辑和识别了。这里是支持中文的。