Java Zxing生成二维码与解析

代码与jar包下载 提取码：edvu

package code;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;


public class Zxing {
    private static final int BLACK = 0xff000000;
    private static final int WHITE = 0xFFFFFFFF;
    public static void main(String[] args) {
        //2.最多2685个字母635个汉字超过则报错
        Zxing test = new Zxing();
        String filePostfix="png";
        String content="https://www.baidu.com?name=郭云飞";
        try {
            content =new String(content.getBytes("UTF-8"),"ISO-8859-1");
        } catch (Exception e) {
            e.printStackTrace();
        }
        File file = new File("E:/code/"+System.currentTimeMillis()+"."+filePostfix);
        test.encode(content,file,filePostfix,BarcodeFormat.QR_CODE,64+12*(51-1),64+12*(51-1),null);
        test.decodeQr("E:\\code\\1502524946182.png");
    }

    /**
     *  生成QRCode二维码<br> 
     *  在编码时需要将com.google.zxing.qrcode.encoder.Encoder.java中的<br>
     *  static final String DEFAULT_BYTE_MODE_ENCODING = "ISO8859-1";<br>
     *  修改为UTF-8，否则中文编译后解析不了<br>
     * @param contents 二维码的内容
     * @param file 二维码保存的路径，如：C://test_QR_CODE.png
     * @param filePostfix 生成二维码图片的格式：png,jpeg,gif等格式
     * @param format qrcode码的生成格式
     * @param width 图片宽度
     * @param height 图片高度
     * @param hints
     */
    public void encode(String contents, File file,String filePostfix, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints) {
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, format, width, height);
            writeToFile(bitMatrix, filePostfix, file);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 生成二维码图片<br>
     * 
     * @param matrix
     * @param format
     *            图片格式
     * @param file
     *            生成二维码图片位置
     * @throws IOException
     */
    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        ImageIO.write(image, format, file);
    }

    /**
     * 生成二维码内容<br>
     * 
     * @param matrix
     * @return
     */
    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);
            }
        }
        return image;
    }

    /**
     * 二维码解析
     * @param filePath
     * @return
     */
    public static String decodeQr(String filePath) {
        String retStr = "";
        if ("".equalsIgnoreCase(filePath) && filePath.length() == 0) {
            return "图片路径为空!";
        }
        try {
            BufferedImage bufferedImage = ImageIO.read(new FileInputStream(filePath));
            LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);
            Binarizer binarizer = new HybridBinarizer(source);
            BinaryBitmap bitmap = new BinaryBitmap(binarizer);
            HashMap<DecodeHintType, Object> hintTypeObjectHashMap = new HashMap<DecodeHintType,Object>();
            hintTypeObjectHashMap.put(DecodeHintType.CHARACTER_SET, "UTF-8");
            Result result = new MultiFormatReader().decode(bitmap, hintTypeObjectHashMap);
            retStr = result.getText();
            System.out.println("解析完成："+retStr);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return retStr;
    }

}