java 使用ZXing生成二维码

1 下载 zxing 类库

2 生成二维码简单实例

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.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;

/**
* 类名称：Encoder
* 描述：  二维码生成
* 创建人：wangql
* 创建时间：2017-3-14
*/
public class Encoder {

public static void main(String[] args) {
String contents = "生成一个二维码";
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
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);
System.out.println("二维码生成成功");
} catch (IOException e) {
System.out.println("二维码生成失败");
e.printStackTrace();
}
}
}

3 解析二维码简单实例

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.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
*
* 类名称：Decoder
* 描述：  解析二维码
* 创建人：wangql
* 创建时间：2017-3-14
*/
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<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
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());
}

}