zxing代码中core和javase模块介绍

zxing的源码中包含很多的模块&＃xff0c;模块列表如下&＃xff1a;

• core: The core image decoding library, and test code
• javase: J2SE-specific client code
• zxingorg: The source behind zxing.org/w
• zxing.appspot.com: The source behind our web-based barcode generator
• android: Android client, called Barcode Scanner
• androidtest: Android test app
• android-integration: Supports integration with our Barcode Scanner app via Intent
• actionscript: partial port to Actionscript
• glass-mirror: partial implementation for the Google Glass Mirror API
• jruby: Ruby wrapper  

core为zxing的核心代码&＃xff0c;包括encode和decode的代码。

javase可以定义为一个辅助代码&＃xff0c;主要提供一些工具类。比如&＃xff1a;读取image的代码类ImageReader、写image到文件的类MatrixToImageWriter。充分使用zxing的javase模块提供的工具类&＃xff0c;既方便了代码的编写工作&＃xff0c;又避免了上网找一些类似的代码。

刚接触zxing的时候&＃xff0c;网上有说需要引用core和javase两个模块&＃xff0c;做开发&＃xff0c;但是由于刚接触&＃xff0c;具体也不清楚javase的功能&＃xff0c;做例子的时候就没有引用javase的jar。写了用zxing读写pdf417的例子之后&＃xff0c;再看javase&＃xff0c;发现javase中已经提供了我在网上找的代码的功能&＃xff0c;于是重构上篇博文提供的代码&＃xff0c;这里贴出重构后的两个类文件&＃xff0c;读者可以与上篇博文中贴出的两个类进行对比&＃xff0c;从中体会javase模块的好处。

ZxingPdfWrite

package test;import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URLDecoder;import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.ImageReader;
import com.google.zxing.common.HybridBinarizer;public class ZxingPdfRead {/*** &＃64;param args* &＃64;throws IOException*/public static void main(String[] args) throws Exception {try {File testImage &＃61; new File("E:\\work\\all_workspace\\wp_zxing\\barcode4jTest\\src\\test\\helloworld.png");BufferedImage image &＃61; ImageReader.readImage(testImage);LuminanceSource source &＃61; new BufferedImageLuminanceSource(image);BinaryBitmap bitmap &＃61; new BinaryBitmap(new HybridBinarizer(source));Result result &＃61; new MultiFormatReader().decode(bitmap);String resultText &＃61; result.getText();System.out.println("resultText:"&＃43; URLDecoder.decode(resultText, "UTF-8"));} catch (Exception e) {e.printStackTrace();}}
} ZxingPdfWrite

package test;import java.io.File;
import java.net.URLEncoder;import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.pdf417.PDF417Writer;public class ZxingPdfWrite {/*** &＃64;param args* &＃64;throws WriterException*/public static void main(String[] args) throws Exception {// TODO Auto-generated method stubPDF417Writer pdf417Writer &＃61; new PDF417Writer();//注意中文乱码问题BitMatrix bitMatrix &＃61; pdf417Writer.encode(URLEncoder.encode("我是中国人","UTF-8"),BarcodeFormat.PDF_417, 100, 50);MatrixToImageWriter.writeToFile(bitMatrix, "png", new File("E:\\work\\all_workspace\\wp_zxing\\barcode4jTest\\src\\test\\helloworld.png"));}
}