com.barcke.y.baidu.component.utils.ZxingUtil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of baidu-applet-sdk Show documentation
Baidu applet Toolkit
The newest version!
package com.barcke.y.baidu.component.utils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;

/**
  *                  ,;,,;
  *                ,;;'(    社
  *      __      ,;;' ' \   会
  *   /'  '\'~~'~' \ /'\.)  主
  * ,;(      )    /  |.     义
  *,;' \    /-.,,(   ) \    码
  *     ) /       ) / )|    农
  *     ||        ||  \)     
  *     (_\       (_\
  *
  * @author Barcke
  * @version 1.0
  **/
public class ZxingUtil {

    private static Log log = LogFactory.getLog(ZxingUtil.class);

    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    private static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

    private static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, file)) {
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }
    }

    /**
     * 将内容contents生成长宽均为width的图片，图片路径由imgPath指定
     * @param width 长宽高
     * @param imgPath 本地地址
     * @param contents base64内容
     * @return File
     */
    public static File getQRCodeImge(String contents, int width, String imgPath) {
        return getQRCodeImge(contents, width, width, imgPath);
    }

    /**
     * 将内容contents生成长为width，宽为width的图片，图片路径由imgPath指定
     * @param contents base64内容
     * @param imgPath 本地存放地址
     * @param width 宽
     * @param height 高
     * @return File
     */
    public static File getQRCodeImge(String contents, int width, int height, String imgPath) {
        try {
            Map hints = new Hashtable();
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
            hints.put(EncodeHintType.CHARACTER_SET, "UTF8");

            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);

            File imageFile = new File(imgPath);
            writeToFile(bitMatrix, "png", imageFile);

            return imageFile;

        } catch (Exception e) {
            log.error("create QR code error!", e);
            return null;
        }
    }
}