二维码生成Java实现代码

本文实例为大家分享了二维码生成java实现代码，供大家参考，具体内容如下

package com.yihaomen.barcode;

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.result;
import com.google.zxing.common.bitmatrix;
import com.google.zxing.common.hybridbinarizer;
import com.google.zxing.qrcode.decoder.errorcorrectionlevel;

/**
 * 二维码工具类
 * 
 */
public class qrcodeutil {

 private static final string charset = "utf-8";
 private static final string format_name = "jpg";
 // 二维码尺寸
 private static final int qrcode_size = 300;
 // logo宽度
 private static final int width = 60;
 // logo高度
 private static final int height = 60;

 private static bufferedimage createimage(string content, string imgpath,
  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 (imgpath == null || "".equals(imgpath)) {
  return image;
 }
 // 插入图片
 qrcodeutil.insertimage(image, imgpath, needcompress);
 return image;
 }

 /**
 * 插入logo
 * 
 * @param source
 *  二维码图片
 * @param imgpath
 *  logo图片地址
 * @param needcompress
 *  是否压缩
 * @throws exception
 */
 private static void insertimage(bufferedimage source, string imgpath,
  boolean needcompress) throws exception {
 file file = new file(imgpath);
 if (!file.exists()) {
  system.err.println(""+imgpath+" 该文件不存在！");
  return;
 }
 image src = imageio.read(new file(imgpath));
 int width = src.getwidth(null);
 int height = src.getheight(null);
 if (needcompress) { // 压缩logo
  if (width > width) {
  width = width;
  }
  if (height > height) {
  height = 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();
 }

 /**
 * 生成二维码(内嵌logo)
 * 
 * @param content
 *  内容
 * @param imgpath
 *  logo地址
 * @param destpath
 *  存放目录
 * @param needcompress
 *  是否压缩logo
 * @throws exception
 */
 public static void encode(string content, string imgpath, string destpath,
  boolean needcompress) throws exception {
 bufferedimage image = qrcodeutil.createimage(content, imgpath,
  needcompress);
 mkdirs(destpath);
 string file = new random().nextint(99999999)+".jpg";
 imageio.write(image, format_name, new file(destpath+"/"+file));
 }

 /**
 * 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)
 * @author lanyuan
 * email: [e-mail]
 * @date 2013-12-11 上午10:16:36
 * @param destpath 存放目录
 */
 public static void 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();
 }
 }

 /**
 * 生成二维码(内嵌logo)
 * 
 * @param content
 *  内容
 * @param imgpath
 *  logo地址
 * @param destpath
 *  存储地址
 * @throws exception
 */
 public static void encode(string content, string imgpath, string destpath)
  throws exception {
 qrcodeutil.encode(content, imgpath, destpath, false);
 }

 /**
 * 生成二维码
 * 
 * @param content
 *  内容
 * @param destpath
 *  存储地址
 * @param needcompress
 *  是否压缩logo
 * @throws exception
 */
 public static void encode(string content, string destpath,
  boolean needcompress) throws exception {
 qrcodeutil.encode(content, null, destpath, needcompress);
 }

 /**
 * 生成二维码
 * 
 * @param content
 *  内容
 * @param destpath
 *  存储地址
 * @throws exception
 */
 public static void encode(string content, string destpath) throws exception {
 qrcodeutil.encode(content, null, destpath, false);
 }

 /**
 * 生成二维码(内嵌logo)
 * 
 * @param content
 *  内容
 * @param imgpath
 *  logo地址
 * @param output
 *  输出流
 * @param needcompress
 *  是否压缩logo
 * @throws exception
 */
 public static void encode(string content, string imgpath,
  outputstream output, boolean needcompress) throws exception {
 bufferedimage image = qrcodeutil.createimage(content, imgpath,
  needcompress);
 imageio.write(image, format_name, output);
 }

 /**
 * 生成二维码
 * 
 * @param content
 *  内容
 * @param output
 *  输出流
 * @throws exception
 */
 public static void encode(string content, outputstream output)
  throws exception {
 qrcodeutil.encode(content, null, output, false);
 }

 /**
 * 解析二维码
 * 
 * @param file
 *  二维码图片
 * @return
 * @throws exception
 */
 public 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));
 result result;
 hashtable<decodehinttype, object> hints = new hashtable<decodehinttype, object>();
 hints.put(decodehinttype.character_set, charset);
 result = new multiformatreader().decode(bitmap, hints);
 string resultstr = result.gettext();
 return resultstr;
 }

 /**
 * 解析二维码
 * 
 * @param path
 *  二维码图片地址
 * @return
 * @throws exception
 */
 public static string decode(string path) throws exception {
 return qrcodeutil.decode(new file(path));
 }

 public static void main(string[] args) throws exception {
 string text = "http://www.yihaomen.com";
 qrcodeutil.encode(text, "c:/me.jpg", "c:/barcode", true);
 }
}

大家可以参考专题：java二维码进行学习

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