From 59e91a4e9ddaf23cebb12993c774aa899ab22d16 Mon Sep 17 00:00:00 2001
From: 郑永安 <zyazyz250@sina.com>
Date: 星期一, 19 六月 2023 14:22:45 +0800
Subject: [PATCH] 描述
---
src/main/java/com/gk/firework/Domain/Utils/MatrixToImageWriter.java | 82 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 82 insertions(+), 0 deletions(-)
diff --git a/src/main/java/com/gk/firework/Domain/Utils/MatrixToImageWriter.java b/src/main/java/com/gk/firework/Domain/Utils/MatrixToImageWriter.java
new file mode 100644
index 0000000..a527583
--- /dev/null
+++ b/src/main/java/com/gk/firework/Domain/Utils/MatrixToImageWriter.java
@@ -0,0 +1,82 @@
+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<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
+ // 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;
+ }
+}
+
+
--
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