- 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;
- import javax.imageio.ImageIO;
- import com.google.zxing.BarcodeFormat;
- import com.google.zxing.EncodeHintType;
- import com.google.zxing.MultiFormatWriter;
- import com.google.zxing.common.BitMatrix;
- public class codeUtil {public static String createQrCode(String url, String path, String fileName) {
- try {
- Map<EncodeHintType, String> hints = new HashMap<>();
- hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
- BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, hints);
- File file = new File(path, fileName);
- if (file.exists() || ((file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile())) {
- writeToFile(bitMatrix, "jpg", file);
- System.out.println("搞定:" + file);
- return file.toString();
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
- 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);
- }
- }
- 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);
- }
- }
- private static final int BLACK = 0xFF000000;
- private static final int WHITE = 0xFFFFFFFF;
- 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;
- }
- public static void main(String[] args) {
- createQrCode("www.baidu.com","D:\\","code.jpg");
- }
- }
pom 文件依赖
- <dependency>
- <groupId>com.google.zxing</groupId>
- <artifactId>core</artifactId>
- <version>3.1.0</version>
- </dependency>
来源: http://www.bubuko.com/infodetail-2600823.html