java生成二维码

谁借莪１个温暖的怀抱￠ 2022-08-17 14:28 178阅读 0赞

1工具类：package com.user.test;import java.awt.Graphics2D;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;import com.google.zxing.LuminanceSource;public final class BufferedImageLuminanceSource extends LuminanceSource \{ private final BufferedImage image; private final int left; private final int top; public BufferedImageLuminanceSource(BufferedImage image) \{ this(image, 0, 0, image.getWidth(), image.getHeight()); \} public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) \{ super(width, height); int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); if (left + width > sourceWidth || top + height > sourceHeight) \{ throw new IllegalArgumentException("Crop rectangle does not fit within image data."); \} for (int y = top; y < top + height; y++) \{ for (int x = left; x < left + width; x++) \{ if ((image.getRGB(x, y) & 0xFF000000) == 0) \{ image.setRGB(x, y, 0xFFFFFFFF); // = white \} \} \} this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE\_BYTE\_GRAY); this.image.getGraphics().drawImage(image, 0, 0, null); this.left = left; this.top = top; \} public byte\[\] getRow(int y, byte\[\] row) \{ if (y < 0 || y >= getHeight()) \{ throw new IllegalArgumentException("Requested row is outside the image: " + y); \} int width = getWidth(); if (row == null || row.length < width) \{ row = new byte\[width\]; \} image.getRaster().getDataElements(left, top + y, width, 1, row); return row; \} public byte\[\] getMatrix() \{ int width = getWidth(); int height = getHeight(); int area = width \* height; byte\[\] matrix = new byte\[area\]; image.getRaster().getDataElements(left, top, width, height, matrix); return matrix; \} public boolean isCropSupported() \{ return true; \} public LuminanceSource crop(int left, int top, int width, int height) \{ return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height); \} public boolean isRotateSupported() \{ return true; \} public LuminanceSource rotateCounterClockwise() \{ int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth); BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE\_BYTE\_GRAY); Graphics2D g = rotatedImage.createGraphics(); g.drawImage(image, transform, null); g.dispose(); int width = getWidth(); return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width); \} \} 2工具类：package com.user.test;import java.awt.image.BufferedImage;import java.io.File;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.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.WriterException; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.user.test.BufferedImageLuminanceSource;public class CreateParseCode \{public static void main(String\[\] args) throws IOException, WriterException \{CreateParseCode cpCode = new CreateParseCode();// 生成二维码cpCode.createCode();// 解析二维码cpCode.parseCode(new File("D:/二维码生成/TDC-test.png"));\}/\*\* \* 二维码的生成 \* \*/@SuppressWarnings(\{ "unchecked", "rawtypes" \})public void createCode() \{String text = "http://baidu.com";int width = 300;int height = 300;// 二维码的图片格式String format = "png";/\*\* \* 设置二维码的参数 \*/HashMap hints = new HashMap();// 内容所使用编码hints.put(EncodeHintType.CHARACTER\_SET, "utf-8");try \{BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR\_CODE, width, height, hints);// 生成二维码File outputFile = new File("D:" + File.separator + "二维码生成"+ File.separator + "TDC-test.png");MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);\} catch (Exception e) \{e.printStackTrace();\}\}/\*\* \* 二维码的解析 \* \* @param file \*/@SuppressWarnings(\{ "unchecked", "rawtypes" \})public void parseCode(File file) \{try \{MultiFormatReader formatReader = new MultiFormatReader();if (!file.exists()) \{return;\}BufferedImage image = ImageIO.read(file);LuminanceSource source = new BufferedImageLuminanceSource(image);Binarizer binarizer = new HybridBinarizer(source);BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);Map hints = new HashMap();hints.put(EncodeHintType.CHARACTER\_SET, "UTF-8");Result result = formatReader.decode(binaryBitmap, hints);System.out.println("解析结果 = " + result.toString());System.out.println("二维码格式类型 = " + result.getBarcodeFormat());System.out.println("二维码文本内容 = " + result.getText());\} catch (Exception e) \{e.printStackTrace();\}\}\}3工具类：package com.user.test;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import com.google.zxing.common.BitMatrix;public final class MatrixToImageWriter \{private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;private MatrixToImageWriter() \{\}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;\}//生成图片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);\}\}//public static void writeToStream(BitMatrix matrix, String format,OutputStream stream) throws IOException \{BufferedImage image = toBufferedImage(matrix);boolean zj = ImageIO.write(image, format, stream);if (!zj) \{throw new IOException("Could not write an image of format "+ format);\} else \{System.err.println("刷新成功!");\}\}\}