package com.gk.firework.Domain.Utils; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.WriterException; import com.google.zxing.common.BitMatrix; import sun.misc.BASE64Encoder; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.io.OutputStream; import java.util.Hashtable; public class MatrixToImageWriter { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private MatrixToImageWriter() { } 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); } } private 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); } } public static String getBase64Img(String text) throws IOException, WriterException { // 二维码图片宽度 int width = 40; // 二维码图片高度 int height = 40; // 二维码的图片格式 String format = "jpg"; Hashtable hints = new Hashtable(); // 内容所使用字符集编码 hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.CODE_128, width, height, hints); /*BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);*/ // 生成二维码 File outputFile = new File("d:" + File.separator + "new.jpg"); MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream(); MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream); byte[] pngData = pngOutputStream.toByteArray(); BASE64Encoder encoder = new BASE64Encoder(); String png_base64 = encoder.encodeBuffer(pngData).trim(); png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", ""); return png_base64; } }