com.egzosn.pay.common.util.MatrixToImageWriter Maven / Gradle / Ivy
package com.egzosn.pay.common.util;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
/**
* 二维码生成工具
* @author egan
*
* email [email protected]
* date 2017/2/7 10:35
*
*/
public class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private MatrixToImageWriter() {}
/**
* 根据二维矩阵的碎片 生成对应的二维码图像缓冲
* @param matrix 二维矩阵的碎片 包含 宽高 行，字节
* @see com.google.zxing.common.BitMatrix
* @return 二维码图像缓冲
*/
public 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;
}
/**
* 二维码生成文件
* @param matrix 二维矩阵的碎片 包含 宽高 行，字节
* @param format 格式
* @param file 保持的文件地址
* @throws IOException 文件保存异常
*/
public 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);
}
}
/**
* 二维码生成流
* @param matrix 二维矩阵的碎片 包含 宽高 行，字节
* @param format 格式
* @param stream 保持的文件输出流
* @throws IOException 文件保存异常
*/
public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
/**
* 二维码信息写成JPG文件
* @param content 二维码信息
* @param fileUrl 文件地址
*/
public static void writeInfoToJpgFile(String content, String fileUrl){
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
try {
BitMatrix bitMatrix = multiFormatWriter.encode(content,
BarcodeFormat.QR_CODE, 250, 250, hints);
File file1 = new File(fileUrl);
MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 二维码信息写成JPG BufferedImage
* @param content 二维码信息
* @return JPG BufferedImage
*/
public static BufferedImage writeInfoToJpgBuff(String content){
BufferedImage re=null;
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
try {
BitMatrix bitMatrix = multiFormatWriter.encode(content,
BarcodeFormat.QR_CODE, 250, 250, hints);
re=MatrixToImageWriter.toBufferedImage(bitMatrix);
} catch (Exception e) {
e.printStackTrace();
}
return re;
}
}