python調用zxing項目進行二維碼
- 2020 年 1 月 9 日
- 筆記
摘要：首先創建一個java的maven項目，加入zxing相關包，編寫二維碼相關代碼，調試運行，打包；然後創建一個python項目，安裝jpype，編寫代碼把相關的jar包加載，運行。
0. 創建一個maven項目
1. 配置pom.xml文件
<!-- https://mvnrepository.com/artifact/com.google.zxing/core --> <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>3.0.0</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.1.29</version> </dependency>
2. 生成與識別二維碼###
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 com.alibaba.fastjson.JSONObject; import com.google.zxing.BarcodeFormat; import com.google.zxing.BinaryBitmap; import com.google.zxing.DecodeHintType; import com.google.zxing.EncodeHintType; 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 QRCode { public static void main(String[] args) { QRCode qrcode = new QRCode(); // 內容 JSONObject json = new JSONObject(); json.put("blog", "http://blog.csdn.net/ld326"); json.put("author", "happyprince"); String content = json.toJSONString(); // 生成二維碼 qrcode.EncodeQR("D:\info-qr.png", content, 200, 200, "png"); // 解釋二維碼 boolean b = qrcode.DecodeQR("D:\info-qr.png"); if (b) { System.out.println("解釋出來是二維碼！！！"); } } /** * 生成圖像 */ public void EncodeQR(String filePath, String content, int width, int height, String format) { Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); try { // 生成矩陣 BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints); // 輸出圖像 Path path = FileSystems.getDefault().getPath(filePath); System.out.println(path); MatrixToImageWriter.writeToPath(bitMatrix, format, path); } catch (WriterException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("生成二維碼成功."); } /** * 解析圖像 */ public boolean DecodeQR(String filePath) { boolean b = false; try { // 讀入圖片,轉化成位圖 BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer( new BufferedImageLuminanceSource(ImageIO.read(new File( filePath))))); // 設置額外的一些信息，例如讀取入來的提示信息 Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); // 對圖像進行解碼 Result result = new MultiFormatReader().decode(binaryBitmap, hints); // 打印信息 // sb.append("content： " + result.getText() + " "); // sb.append("format： " + result.getBarcodeFormat() + " "); b = true; } catch (IOException e) { // sb.append(e + " " + "filePath=" + filePath); e.printStackTrace(); } catch (NotFoundException e) { // sb.append(e + " " + "filePath=" + filePath); e.printStackTrace(); } return b; } }
3. 打包
生成qrcode包，命名為qrcode-1.0.0.jar；再把maven下載的兩個包（javase-3.0.0.jar，core-3.3.0.jar）與這個包放在一起，一會會把這些包加載到jvm中運行。
4. 安裝jpype
目前配置的是win7,下載地址：http://www.lfd.uci.edu/~gohlke/pythonlibs/#jpype
5. 創建python項目
編寫python代碼
# -*- coding: utf-8 -*- import logging from jpype import * from common.globalVars import JAR_PATH @singleton class QRCode: """ 判斷圖片是否QR圖片 """ def __init__(self): logging.info('starJVM..') startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=%s;%s;%s" % ( JAR_PATH + 'core-3.3.0.jar', JAR_PATH + 'javase-3.0.0.jar', JAR_PATH + 'qrcode-1.0.0.jar' )) QRCode = JClass("com.lr.jpype.jpype.QRCode") self.qr = QRCode() def is_qrcode(self, file_name): b = self.qr.DecodeQR(file_name) return b def __del__(self): shutdownJVM() logging.info('shutdownJVM..') qrc = QRCode() print(qrc.is_qrcode('d:/1.jpg'))
其中裝飾類，為了完成單例的功能
import logging def singleton(cls): instances = {} def wrapper(*args, **kwargs): if cls not in instances: instances[cls] = cls(*args, **kwargs) return instances[cls] logging.info('singleton size %d' % (len(instances))) return wrapper
總結，這個主要是python依靠jpype，jpype運行JVM，JVM調用相關的包處理QR，主要實現的包為google的zxing。
