java ZXing生成二维码及条码实例分享

1、jar包：   zxing-core-3.3.0.jar 　　

　　　　　  zxing-javase-3.3.0.jar　 

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, height);
  int sourcewidth = image.getwidth();
  int sourceheight = image.getheight();
  if (left + width > sourcewidth || top + height > sourceheight) {
   throw new illegalargumentexception("crop rectangle does not fit within image data.");
  }
  for (int y = top; y < top + height; y++) {
   for (int x = left; x < left + width; x++) {
    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 illegalargumentexception("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;
 }
 public 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 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: 二维码编码
* @author liuy
* @date 2016年7月9日 下午3:03:24 
* 
*/
public class qrcodeutil {
 // 设置二维码编码格式
 private static final string charset = "utf-8";
 // 保存的二维码格式
 private static final string format_name = "jpg";
 // 二维码尺寸
 private static final int qrcode_size = 800;
 // logo宽度
 private static final int logo_width = 80;
 // logo高度
 private static final int logo_height = 80;
 /**
  * @title: createimage
  * @description: 将二维码内容创建到image流
  * @param content 二维码内容
  * @param imgpath logo图片地址
  * @param needcompress 是否压缩logo图片大小
  * @return
  * @throws exception 参数说明
  * @return bufferedimage 返回类型
  * @throws
  */
 private 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;
  }
  // 插入logo
  qrcodeutil.insertimage(image, logopath, needcompress);
  return image;
 }
 /**
  * @title: insertimage
  * @description: 将logo插入到二维码中
  * @param source 二维码image流
  * @param imgpath logo地址
  * @param needcompress 是否压缩大小
  * @throws exception 参数说明
  * @return void 返回类型
  * @throws
  */
 private static void insertimage(bufferedimage source, string logopath, boolean needcompress) throws exception {
  file file = new file(logopath);
  if (!file.exists()) {
   system.err.println("" + logopath + " 该文件不存在！");
   return;
  }
  image src = imageio.read(new file(logopath));
  int width = src.getwidth(null);
  int height = src.getheight(null);
  if (needcompress) { // 压缩logo
   if (width > 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); // 绘制缩小后的图
   g.dispose();
   src = image;
  }
  // 插入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: 创建文件夹
  * @param destpath 文件夹地址
  * @return void 返回类型
  * @throws
  */
 private static boolean mkdirs(string destpath) {
  file file = new file(destpath);
  // 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
  if (!file.exists() && !file.isdirectory()) {
   file.mkdirs();
   return true;
  }
  return false;
 }
 /**
  * @title: encode
  * @description: 生成二维码
  * @param content 二维码内容
  * @param imgpath logo图片地址
  * @param destpath 目标保存地址
  * @param needcompress 是否压缩logo图片大小
  * @throws exception 参数说明
  * @return void 返回类型
  * @throws
  */
 private static void encode(string content, string logopath, string destpath, boolean needcompress) throws exception {
  bufferedimage 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: 生成二维码
  * @param content 二维码内容
  * @param destpath 目标保存地址
  * @throws exception 参数说明
  * @return void 返回类型
  * @throws
  */
 public static void encode(string content, string destpath) throws exception {
  qrcodeutil.encode(content, null, destpath, false);
 }
 /**
  * @title: encode
  * @description: 生成二维码
  * @param content 二维码内容
  * @param imgpath logo图片地址
  * @param output 输出流
  * @param needcompress 是否压缩logo图片大小
  * @throws exception 参数说明
  * @return void 返回类型
  * @throws
  */
 public static void encode(string content, string logopath, outputstream output, boolean needcompress) throws exception {
  bufferedimage image = qrcodeutil.createimage(content, logopath, needcompress);
  imageio.write(image, format_name, output);
 }
 /**
  * @title: encode
  * @description: 生成二维码
  * @param content 二维码内容
  * @param output 输出流
  * @throws exception 参数说明
  * @return void 返回类型
  * @throws
  */
 public static void encode(string content, outputstream output) throws exception {
  qrcodeutil.encode(content, null, output, false);
 }
 /**
  * @title: decode
  * @description: 对二维码解码
  * @param file 文件对象
  * @return 解码后的二维码内容字符串
  * @throws exception 参数说明
  * @return string 返回类型
  * @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 new multiformatreader().decode(bitmap, hints).gettext();
 }
 /**
  * @title: decode
  * @description: 对二维码解码
  * @param path 文件路径
  * @return
  * @throws exception 参数说明
  * @return string 返回类型
  * @throws
  */
 public static string decode(string path) throws exception {
  return 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 httpservlet {
 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(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
  // todo auto-generated method stub
  doget(request, response);
 }
}

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