標籤:
不得不說,二維碼的應用越來越廣泛了。廢話不多說了。。
此處採用的jar不多,只用zxing包裡面的core.jar包即可,大家自行下載,
如果是百度雲端硬碟,地址為:http://pan.baidu.com/s/1eQeWFaq
以後很多的部落格資源將會更新到這個地址中,大家盡量把資源轉移自己的盤,防止連結某天突然掛了。
執行個體:
genQRCode(String content,String url),其中url絕對路徑,就是這個類的調用方法,傳回值二維碼檔案名稱,產生png格式(如需其他,自行更改),開頭已經定義了圖片大小為300*300
import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Hashtable;import javax.imageio.ImageIO;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;public class MatrixToImageWriter { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private static final int WIDTH = 300; private static final int HEIGHT = 300; 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; } 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); if (!ImageIO.write(image, format, stream)) { throw new IOException("Could not write an image of format " + format); } } //產生二維碼圖片content:內容 ,url:產生路徑 public static String genQRCode(String content,String url){ //驗證是否存在檔案夾 CreateDir.createDir(url); String filename = null; //二維碼的圖片格式 String format = "png"; Hashtable hints = new Hashtable(); //內容所使用編碼 hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); BitMatrix bitMatrix; try { bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints); //產生名字,如果有自己的特有規則,以下3行自行更改 int s=(int)(Math.random()*10000);//整數類型 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); filename = "file_" + sdf.format(new Date())+s +"." + format ; //產生二維碼 File outputFile = new File(url+File.separator+filename); MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); } catch (WriterException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return filename; } }
java基於Google開發的zxing包開發的二維碼產生工具