89367267 2016-03-17
二维码的生成与解析。有多种途径。我选择用大品牌,google老大的zxing。
gitHub链接是(我用的3.0.0,已经是nio了)
https://github.com/zxing/zxing/tree/zxing-3.0.0
// 其中输出图像和读取图像的类在core包 MultiFormatReader MultiFormatWriter // 生成矩阵的类在javase的包里 MatrixToImageWriter
pom.xml中的配置为
package com.polysaas.edu.qrcode; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import org.junit.Test; import com.alibaba.fastjson.JSONObject; import com.google.zxing.BarcodeFormat; import com.google.zxing.Binarizer; import com.google.zxing.BinaryBitmap; import com.google.zxing.DecodeHintType; import com.google.zxing.EncodeHintType; import com.google.zxing.LuminanceSource; import com.google.zxing.MultiFormatReader; import com.google.zxing.MultiFormatWriter; import com.google.zxing.NotFoundException; import com.google.zxing.Result; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; public class QRCodeTest { /** * 生成图像 * * @throws WriterException * @throws IOException */ @Test public void testEncode() throws WriterException, IOException { String filePath = "D://"; String fileName = "zxing.png"; JSONObject json = new JSONObject(); json.put( "zxing", "https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing"); json.put("author", "shihy"); String content = json.toJSONString();// 内容 int width = 200; // 图像宽度 int height = 200; // 图像高度 String format = "png";// 图像类型 Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵 Path path = FileSystems.getDefault().getPath(filePath, fileName); MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像 System.out.println("输出成功."); } /** * 解析图像 */ @Test public void testDecode() { String filePath = "D://zxing.png"; BufferedImage image; try { image = ImageIO.read(new File(filePath)); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码 JSONObject content = JSONObject.parseObject(result.getText()); System.out.println("图片中内容: "); System.out.println("author: " + content.getString("author")); System.out.println("zxing: " + content.getString("zxing")); System.out.println("图片中格式: "); System.out.println("encode: " + result.getBarcodeFormat()); } catch (IOException e) { e.printStackTrace(); } catch (NotFoundException e) { e.printStackTrace(); } } }
测试生成图像为:
解析到的内容为:
图片中内容: author: shihy zxing: https://github.com/zxing/zxing/tree/zxing-3.0.0/javase/src/main/java/com/google/zxing 图片中格式: encode: QR_CODE