Java zxing generate two-dimensional code and barcode instance sharing _java

1,jar package : Zxing-core-3.3.0.jar http://mvnrepository.com/artifact/com.google.zxing/core

Zxing-javase-3.3.0.jar Http://mvnrepository.com/artifact/com.google.zxing/javase

Bufferedimageluminancesource.java

Package com.webos.util;
Import Java.awt.Graphics2D;
Import Java.awt.geom.AffineTransform;
Import Java.awt.image.BufferedImage;
Import Com.google.zxing.LuminanceSource;
 public class Bufferedimageluminancesource extends Luminancesource {private final bufferedimage image;
 private final int left;
 private final int top;
 Public Bufferedimageluminancesource (bufferedimage image) {This (image, 0, 0, image.getwidth (), Image.getheight ()); Public Bufferedimageluminancesource (bufferedimage image, int left, int top, int width, int height) {Super (width, hei
  Ght);
  int sourcewidth = Image.getwidth ();
  int sourceheight = Image.getheight (); if (left + width > Sourcewidth | | top + height > sourceheight) {throw new IllegalArgumentException ("Crop Rectang
  Le does not fit within image data. "); for (int y = top; y < top + height; y++) {for (int x = left; x < left + width; + +) {if (Image.getrgb (x, y ) & 0xff000000) = = 0) {Image.setrgb (x, y, 0xFFFFFFFF);
  = white}} this.image = new BufferedImage (Sourcewidth, Sourceheight, Bufferedimage.type_byte_gray);
  This.image.getGraphics (). DrawImage (image, 0, 0, NULL);
  This.left = left;
 This.top = top; Public byte[] GetRow (int y, byte[] row {if (Y < 0 | | | y >= getheight ()) {throw new Illegalargumentexceptio
  N ("Requested row is outside the image:" + y);
  int width = getwidth ();
  if (row = = NULL | | Row.length < width) {row = new Byte[width];
  } image.getraster (). getDataElements (left, top + y, width, 1, row);
 return row;
  Public byte[] Getmatrix () {int width = getwidth ();
  int height = getheight ();
  int area = width * height;
  byte[] Matrix = new Byte[area];
  Image.getraster (). getDataElements (left, top, width, height, matrix);
 return matrix;
 public Boolean iscropsupported () {return true; Luminancesource crop (int left, int top, int width, int height) {return new Bufferedimageluminancesource (image , This.left + LEFT, This.top + top, width, height);
 public Boolean isrotatesupported () {return true;
  Public Luminancesource rotatecounterclockwise () {int sourcewidth = Image.getwidth ();
  int sourceheight = Image.getheight ();
  AffineTransform transform = new AffineTransform (0.0, -1.0, 1.0, 0.0, 0.0, sourcewidth);
  BufferedImage rotatedimage = new BufferedImage (Sourceheight, Sourcewidth, Bufferedimage.type_byte_gray);
  Graphics2D g = rotatedimage.creategraphics ();
  G.drawimage (image, transform, null);
  G.dispose ();
  int width = getwidth ();
 Return to New Bufferedimageluminancesource (Rotatedimage, Top, Sourcewidth-(left + width), getheight (), width); }
}

Qrcodeutil.java

Package com.webos.util;
Import Java.awt.BasicStroke;
Import Java.awt.Graphics;
Import Java.awt.Graphics2D;
Import Java.awt.Image;
Import Java.awt.Shape;
Import Java.awt.geom.RoundRectangle2D;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import Java.io.OutputStream;
Import java.util.Hashtable;
Import Java.util.Random;
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.MultiFormatReader;
Import Com.google.zxing.MultiFormatWriter;
Import Com.google.zxing.common.BitMatrix;
Import Com.google.zxing.common.HybridBinarizer;
Import Com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; /** * @ClassName: Qrcodeutil * @Description: Two-dimensional code code * @author Liuy * @date July 9, 2016 afternoon 3:03:24 * */public class Qrcodeu
 til {//Set two-dimensional code format private static final String CHARSET = "Utf-8"; Saved two-dimensional code format private static final String Format_name = "JPG";
 Two-dimensional code size private static final int qrcode_size = 800;
 LOGO width private static final int logo_width = 80;
 LOGO height private static final int logo_height = 80; /** * @Title: CreateImage * @Description: Create two-dimensional code content to image stream * @param content two-dimensional code contents * @param Imgpath logo image address * @pa Ram needcompress Compress logo picture size * @return * @throws Exception parameter description * @return bufferedimage return type * @throws * * PRIV Ate static BufferedImage createimage (string content, String Logopath, Boolean needcompress) throws Exception {Hashtable
  <encodehinttype, object> hints = new Hashtable<encodehinttype, object> ();
  Hints.put (Encodehinttype.error_correction, ErrorCorrectionLevel.H);
  Hints.put (Encodehinttype.character_set, CHARSET);
  Hints.put (Encodehinttype.margin, 1);
  Bitmatrix Bitmatrix = new Multiformatwriter (). Encode (content, Barcodeformat.qr_code, qrcode_size, qrcode_size, hints);
  int width = bitmatrix.getwidth ();
  int height = bitmatrix.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, Bitmatrix.get (x, y)?
   0XFF000000:0XFFFFFFFF); } if (Logopath = null | |
  "". Equals (Logopath)) {return image;
  }//Insert logo qrcodeutil.insertimage (image, Logopath, needcompress);
 return image; /** * @Title: Insertimage * @Description: Insert logo into two-dimensional code * @param source two-dimensional code image stream * @param imgpath logo address * @p Aram needcompress Compression Size * @throws Exception parameter description * @return void return type * @throws/private static void Insertimag
  E (bufferedimage source, String Logopath, Boolean needcompress) throws Exception {File File = new file (Logopath); if (!file.exists ()) {System.err.println ("+ Logopath +") The file does not exist!
   ");
  Return
  Image src = imageio.read (new File (Logopath));
  int width = src.getwidth (null);
  int height = src.getheight (null); if (needcompress) {//Compress logo if (width &GT
   Logo_width) {WIDTH = Logo_width;
   } if (height > logo_height) {height = logo_height;
   Image image = Src.getscaledinstance (width, height, image.scale_smooth);
   BufferedImage tag = new BufferedImage (width, height, bufferedimage.type_int_rgb);
   Graphics g = tag.getgraphics (); G.drawimage (image, 0, 0, NULL);
   Draw the reduced figure g.dispose ();
  src = image;
  }//Insert logo graphics2d graph = source.creategraphics ();
  int x = (qrcode_size-width)/2;
  int y = (qrcode_size-height)/2;
  Graph.drawimage (src, x, y, width, height, null);
  Shape shape = new Roundrectangle2d.float (x, y, Width, width, 6, 6);
  Graph.setstroke (New Basicstroke (3f));
  Graph.draw (Shape);
 Graph.dispose (); /** * @Title: Mkdirs * @Description: Create folder * @param destpath folder address * @return void return type * @throws/privat
  E Static Boolean mkdirs (String destpath) {File File = new File (destpath); When a folder does not exist, Mkdirs automatically creates a multi-tiered directory, distinguished from mkdir. (MkDir throws an exception if the parent directory does not exist) if (!file.existS () &&!file.isdirectory ()) {file.mkdirs ();
  return true;
 return false;  /** * @Title: Encode * @Description: Generate two-dimensional code * @param content two-dimensional code contents * @param Imgpath logo image address * @param destpath Target Save Address * @param needcompress compress logo picture size * @throws Exception parameter description * @return void return type * @throws/Private St atic void Encode (string content, String Logopath, String destpath, Boolean needcompress) throws Exception {Bufferedimag
  E image = Qrcodeutil.createimage (content, Logopath, needcompress);
   if (Mkdirs (DestPath)) {String file = new Random (). Nextint (99999999) + ". jpg";
  Imageio.write (image, Format_name, new file (DestPath + "/" + file)); }/** * @Title: Encode * @Description: Generate two dimensional code * @param content two-dimensional code contents * @param destpath Target Save address * @throws EXCEP tion parameter description * @return void return type * @throws/public static void encode (string content, String destpath) throws Except
 Ion {Qrcodeutil.encode (content, NULL, DestPath, FALSE); }/** * @TItle:encode * @Description: Generate two-dimensional code * @param content two-dimensional code contents * @param Imgpath logo image address * @param output stream * @param Needcompress Compress logo picture size * @throws Exception parameter description * @return void return type * @throws/public static void encode (St Ring content, String Logopath, OutputStream output, Boolean needcompress) throws Exception {bufferedimage image = Qrcod
  Eutil.createimage (content, Logopath, needcompress);
 Imageio.write (image, format_name, output); /** * @Title: Encode * @Description: Generate a two-dimensional code * @param content two-dimensional code contents * @param output stream * @throws Exception parameters. Ming * @return void return type * @throws/public static void encode (String content, OutputStream output) throws Exception
 {qrcodeutil.encode (content, NULL, output, false); /** * @Title: Decode * @Description: Decoding of two-dimensional codes * @param file Object * @return decoded two-dimensional code content string * @throws Exception parameters Ming * @return String return type * @throws */private static String decode (file file) throws Exception {BufferedimaGE Image;
  Image = Imageio.read (file);
  if (image = = null) {return null;
  } bufferedimageluminancesource Source = new Bufferedimageluminancesource (image);
  Binarybitmap bitmap = new Binarybitmap (new Hybridbinarizer (source));
  Hashtable<decodehinttype, string> hints = new Hashtable<decodehinttype, string> ();
  Hints.put (Decodehinttype.character_set, CHARSET);
 Return to New Multiformatreader (). Decode (bitmap, hints). GetText ();  /** * @Title: Decode * @Description: Decoding of two-dimensional codes * @param path file paths * @return * @throws Exception parameter description * @return String return type * @throws/public static String decode (string path) throws Exception {returns Qrcodeutil.decode (new
 File (path)); }
}

Qrcodeservlet.java

Package com.webos.servlet;
Import java.io.IOException;
Import javax.servlet.ServletException;
Import Javax.servlet.annotation.WebServlet;
Import Javax.servlet.http.HttpServlet;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;
Import Com.webos.util.QRCodeUtil; * * Servlet Implementation class Qrcodeservlet */@WebServlet ("/qrcodeservlet") public class Qrcodeservlet extends Http
 Servlet {private static final long serialversionuid = 1L;
 * * @see Httpservlet#httpservlet () * * * ()/public Qrcodeservlet () {super (); } * * * @see Httpservlet#doget (httpservletrequest request, HttpServletResponse * response) * * protected void doget ( HttpServletRequest request, HttpServletResponse response) throws Servletexception, IOException {try {String text =
   "Http://www.baidu.com?timestamp=" + system.currenttimemillis ();
  Qrcodeutil.encode (text, Response.getoutputstream ());
  catch (Exception e) {e.printstacktrace (); }}/* @sEE httpservlet#dopost (httpservletrequest request, HttpServletResponse * response) * * protected void DoPost (Httpservle Trequest request, HttpServletResponse response) throws Servletexception, IOException {//TODO auto-generated method Stu
 b doget (request, response); }
}

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