二维码生成和读的工具类

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")));

}

}