Use zxing to encode and decode barcodes, two-dimensional codes and __

First, add the jar pack

    <dependency>
    	<groupId>com.google.zxing</groupId>
    	<artifactid>core</ artifactid>
    	<version>3.0.0</version>
    </dependency>
    <dependency>
    	<groupId>com.google.zxing</groupId>
    	<artifactId>javase</artifactId>
    	< Version>3.0.0</version>
    </dependency>

First, the operation of the bar code

Import Java.awt.image.BufferedImage;
Import Java.io.File;

Import Java.nio.file.Path;

Import Javax.imageio.ImageIO;
Import Com.google.zxing.BarcodeFormat;
Import Com.google.zxing.BinaryBitmap;
Import Com.google.zxing.LuminanceSource;
Import Com.google.zxing.MultiFormatReader;
Import Com.google.zxing.MultiFormatWriter;
Import Com.google.zxing.Result;
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 Eancode {public static void encode (string contents, int width, int height, String imgpath) {in  
                T codewidth = 3 +//Start Guard (7 * 6) +//Left bars 5 +//middle Guard (7 * 6) +//right bars 3;  
        End Guard Codewidth = Math.max (codewidth, width); try {Bitmatrix Bitmatrix = new Multiformatwriter(). Encode (contents, barcodeformat.ean_13, codewidth, height, null);
            Path PATH = new File (Imgpath). Topath ();
  
        Matrixtoimagewriter.writetopath (Bitmatrix, "PNG", path);  
        catch (Exception e) {e.printstacktrace ();  
        } public static string decode (String imgpath) {bufferedimage image = null;  
        result result = NULL;  
            try {image = Imageio.read (new File (Imgpath));  
            if (image = = null) {SYSTEM.OUT.PRINTLN ("The decode image May is not exit.");  
            } luminancesource Source = new Bufferedimageluminancesource (image);  
  
            Binarybitmap bitmap = new Binarybitmap (new Hybridbinarizer (source));  
            result = new Multiformatreader (). Decode (bitmap, NULL);  
        return Result.gettext ();  
        catch (Exception e) {e.printstacktrace (); return null;  
    }/** * @param args */public static void main (string[] args) {String Imgpat  
        h = "D:/123.jpg";  
        String contents = "6943620593115";  
        int width = +, height = 50;
    	
    	Encode (contents, width, height, imgpath);  
        String imgPath2 = "D:/123.jpg";  
        String decodecontent = decode (imgPath2);  
        System.out.println ("Decode the contents as follows:");  
    System.out.println (decodecontent); }
}

Second, the two-dimensional code operation

Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.nio.file.Path;
Import Java.util.HashMap;

Import Java.util.Map;

Import Javax.imageio.ImageIO;
Import Com.google.zxing.BarcodeFormat;
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.Result;
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;

Import Com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; public class QRCode {/** * code * @param contents * @param width * @param height * @param im Gpath */public static void encode (string contents, int width, int height, String imgpath) {map<enCodehinttype, object> hints = new Hashmap<encodehinttype, object> ();  
        Specifies the error correction level Hints.put (encodehinttype.error_correction, ERRORCORRECTIONLEVEL.L);  
        Specifies the encoding format hints.put (encodehinttype.character_set, "UTF-8"); try {Bitmatrix Bitmatrix = new Multiformatwriter (). Encode (contents, barcodeformat.qr_  
            CODE, width, height, hints);
            Path PATH = new File (Imgpath). Topath ();  
        Matrixtoimagewriter.writetopath (Bitmatrix, "PNG", path);  
        catch (Exception e) {e.printstacktrace ();  
        } public static string decode (String imgpath) {bufferedimage image = null;  
        result result = NULL;  
            try {image = Imageio.read (new File (Imgpath));  
            if (image = = null) {SYSTEM.OUT.PRINTLN ("The decode image May is not exit."); } luminancesource Source = new BufferedimaGeluminancesource (image);  
  
            Binarybitmap bitmap = new Binarybitmap (new Hybridbinarizer (source)); 
            Map<decodehinttype, object> hints = new Hashmap<decodehinttype, object> ();  
  
            Hints.put (Decodehinttype.character_set, "UTF-8");  
            result = new Multiformatreader (). Decode (bitmap, hints);  
        return Result.gettext ();  
        catch (Exception e) {e.printstacktrace ();  
    return null; }/** * @param args */public static void main (string[] args) {String Imgpath = "d:/  
        Michael_zxing.png ";  
        String contents = "http://www.paihang.com";  
        int width = +, height = 300;
        
        Encode (contents, width, height, imgpath);  
        String imgPath2 = "D:/michael_zxing.png";  
        String decodecontent = decode (imgPath2);  
        System.out.println ("Decode the contents as follows:");  
    System.out.println (decodecontent); }
  
}

As for more features not to be studied, simply try the basic operation