java生成二维码和解析二维码

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

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

//编码
public class QREncoder {

public static void main(String[] args) throws Exception {
String content = "hello world";
String encoding = "utf-8";
int width = 150;
int height = 150;
String format = "jpg";
File imagePath = new File("d:/test.jpg");

com.google.zxing.Writer writer = new MultiFormatWriter();
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(2);
hints.put(EncodeHintType.CHARACTER_SET, encoding);
BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
MatrixToImageWriter.writeToFile(matrix, format, imagePath);
}

}

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

import javax.imageio.ImageIO;

import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Reader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.GlobalHistogramBinarizer;

//解码
public class QRDecoder {

public static void main(String[] args) throws Exception {
File imagePath = new File("d:/test.jpg");
String encoding = "utf-8";

Reader reader = new MultiFormatReader();
LuminanceSource ls = new BufferedImageLuminanceSource(ImageIO.read(imagePath));
Binarizer b = new GlobalHistogramBinarizer(ls);
Hashtable<DecodeHintType, String> hint1 = new Hashtable<DecodeHintType, String>(2);
hint1.put(DecodeHintType.CHARACTER_SET, encoding);
Result r = reader.decode(new BinaryBitmap(b), hint1);
System.out.println(r.getText());
}

}