二維碼生成，包含文字，網址，圖片等
阿新 • • 發佈：2019-01-03
二維碼所引入的jar包
pom檔案配置
<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>2.1</version> </dependency>
二維碼生成工具類，可自行修改
public class Qr { private static final int BLACK = 0xff000000; private static final int WHITE = 0xFFFFFFFF; public static String tomakeMode(String strJson,String path,String fileName) { Qr test = new Qr(); String filePostfix="png"; File file = new File(path +File.separatorChar+fileName + "."+filePostfix); System.out.println(file.getAbsolutePath()); test.encode(strJson, file,filePostfix, BarcodeFormat.QR_CODE, 5000, 5000, null); return fileName+".png"; } /** * 生成QRCode二維碼<br> * 在編碼時需要將com.google.zxing.qrcode.encoder.Encoder.java中的<br> * static final String DEFAULT_BYTE_MODE_ENCODING = "ISO8859-1";<br> * 修改為UTF-8，否則中文編譯後解析不了<br> * @param contents 二維碼的內容 * @param file 二維碼儲存的路徑，如：C://test_QR_CODE.png * @param filePostfix 生成二維碼圖片的格式：png,jpeg,gif等格式 * @param format qrcode碼的生成格式 * @param width 圖片寬度 * @param height 圖片高度 * @param hints */ public void encode(String contents, File file,String filePostfix, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints) { try { contents = new String(contents.getBytes("UTF-8"), "ISO-8859-1"); BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, format, width, height); writeToFile(bitMatrix, filePostfix, file); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二維碼圖片<br> * * @param matrix * @param format * 圖片格式 * @param file * 生成二維碼圖片位置 * @throws IOException */ public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException { BufferedImage image = toBufferedImage(matrix); ImageIO.write(image, format, file); } /** * 生成二維碼內容<br> * * @param matrix * @return */ public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.getHeight(); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE); } } return image; } //測試二維碼生成： public static void main(String[] args) { // System.out.println(Qr.class.getResource("").getFile()); Qr.tomakeMode("http://mp.weixin.qq.com/s?__biz=MzU0NDgxODMwNg==&mid=100000067&idx=1&sn=0f02e506c90b73c36ab87891bb363168&chksm=7b7714ae4c009db874289edc990e585690aef6ca751db7dab43d8e1e8dcb59b37030534b9dd7&scene=18#wechat_redirect","F:\\","qr"); } }
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