package com.yql.sdk.util;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
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.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 二维码生成和读的工具类
*/
public class QRCodeUtil {
/**
* 生成包含字符串信息的二维码图片
*
* @param outputStream 文件输出流路径
* @param content 二维码携带信息
* @param qrCodeSize 二维码图片大小
* @param imageFormat 二维码的格式
* @throws WriterException
* @throws IOException
*/
public static boolean createQrCode(OutputStream outputStream, String content,int qrCodeSize, String imageFormat)throws WriterException, IOException {
//设置二维码纠错级别ＭＡＰ
Hashtable hintMap =new Hashtable();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);// 矫错级别
QRCodeWriter qrCodeWriter =new QRCodeWriter();
//创建比特矩阵(位矩阵)的QR码编码的字符串
BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);
// 使BufferedImage勾画QRCode (matrixWidth 是行二维码像素点)
int matrixWidth = byteMatrix.getWidth();
BufferedImage image =new BufferedImage(matrixWidth -20, matrixWidth -20, BufferedImage.TYPE_INT_RGB);
image.createGraphics();
Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0,0, matrixWidth, matrixWidth);
// 使用比特矩阵画并保存图像
graphics.setColor(Color.BLACK);
for (int i =0; i < matrixWidth; i++) {
for (int j =0; j < matrixWidth; j++) {
if (byteMatrix.get(i, j)) {
graphics.fillRect(i -10, j -10,1,1);
}
}
}
return ImageIO.write(image, imageFormat, outputStream);
}
/**
* 读二维码并输出携带的信息
*/
public static void readQrCode(InputStream inputStream)throws IOException {
//从输入流中获取字符串信息
BufferedImage image = ImageIO.read(inputStream);
//将图像转换为二进制位图源
LuminanceSource source =new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap =new BinaryBitmap(new HybridBinarizer(source));
QRCodeReader reader =new QRCodeReader();
Result result =null;
try {
result = reader.decode(bitmap);
}catch (ReaderException e) {
e.printStackTrace();
}
System.out.println(result.getText());
}
/**
* 测试代码
*
* @throws Exception
*/
public static void main(String[] args)throws Exception {
createQrCode(new FileOutputStream(new File("d:\\qrcode.jpg")),
"https://wx.xxxx.com/flash",100,"JPEG");
readQrCode(new FileInputStream(new File("d:\\qrcode.jpg")));
}
}
