Java实现二维码生成的代码方法

1、支持QRcode、ZXing 二维码生成、解析；

2、QRCode 方式生成二维码支持添加图片，如下：

package common;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.exception.DecodingFailedException;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.swetake.util.Qrcode;

/**
 * 二维码生成工具类
 * @author Cloud
 * @data 2016-12-15
 * QRCode
 */

public class QRCodeUtil {

 //二维码颜色
 private static final int BLACK = 0xFF000000;
 //二维码颜色
 private static final int WHITE = 0xFFFFFFFF;

 /**
  * <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二维码</span>
  * @param text <a href="javascript:void();" rel="external nofollow" >二维码内容</a>
  * @param width 二维码宽
  * @param height 二维码高
  * @param outPutPath 二维码生成保存路径
  * @param imageType  二维码生成格式
  */
 public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType){
  Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
  //设置编码字符集
  his.put(EncodeHintType.CHARACTER_SET, "utf-8");
  try {
   //1、生成二维码
   BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);

   //2、获取二维码宽高
   int codeWidth = encode.getWidth();
   int codeHeight = encode.getHeight();

   //3、将二维码放入缓冲流
   BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
   for (int i = 0; i < codeWidth; i++) {
    for (int j = 0; j < codeHeight; j++) {
     //4、循环将二维码内容定入图片
     image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
    }
   }
   File outPutImage = new File(outPutPath);
   //如果图片不存在创建图片
   if(!outPutImage.exists())
    outPutImage.createNewFile();
   //5、将二维码写入图片
   ImageIO.write(image, imageType, outPutImage);
  } catch (WriterException e) {
   e.printStackTrace();
   System.out.println("二维码生成失败");
  } catch (IOException e) {
   e.printStackTrace();
   System.out.println("生成二维码图片失败");
  }
 }

 /**
  * <span style="font-size:18px;font-weight:blod;">二维码解析</span>
  * @param analyzePath 二维码路径
  * @return
  * @throws IOException
  */
 @SuppressWarnings({ "rawtypes", "unchecked" })
 public static Object zxingCodeAnalyze(String analyzePath) throws Exception{
  MultiFormatReader formatReader = new MultiFormatReader();
  Object result = null;
  try {
   File file = new File(analyzePath);
   if (!file.exists())
   {
    return "二维码不存在";
   }
   BufferedImage image = ImageIO.read(file);
   LuminanceSource source = new LuminanceSourceUtil(image);
   Binarizer binarizer = new HybridBinarizer(source);
   BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
   Map hints = new HashMap();
   hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
   result = formatReader.decode(binaryBitmap, hints);
  } catch (NotFoundException e) {
   e.printStackTrace();
  }
  return result;
 }

 /**
  * <span style="font-size:18px;font-weight:blod;">QRCode 方式生成二维码</span>
  * @param content 二维码内容
  * @param imgPath 二维码生成路径
  * @param version 二维码版本
  * @param isFlag 是否生成Logo图片 为NULL不生成
  */
 public static void QRCodeCreate(String content, String imgPath, int version, String logoPath){
   try {
   Qrcode qrcodeHandler = new Qrcode();
   //设置二维码排错率，可选L(7%) M(15%) Q(25%) H(30%)，排错率越高可存储的信息越少，但对二维码清晰度的要求越小
   qrcodeHandler.setQrcodeErrorCorrect('M');
   //N代表数字,A代表字符a-Z,B代表其他字符
   qrcodeHandler.setQrcodeEncodeMode('B');
   //版本1为21*21矩阵，版本每增1，二维码的两个边长都增4；所以版本7为45*45的矩阵；最高版本为是40，是177*177的矩阵
   qrcodeHandler.setQrcodeVersion(version);
   //根据版本计算尺寸
   int imgSize = 67 + 12 * (version - 1) ;
   byte[] contentBytes = content.getBytes("gb2312");
   BufferedImage bufImg = new BufferedImage(imgSize , imgSize ,BufferedImage.TYPE_INT_RGB);
   Graphics2D gs = bufImg.createGraphics();
   gs.setBackground(Color.WHITE);
   gs.clearRect(0, 0, imgSize , imgSize);
   // 设定图像颜色 > BLACK
   gs.setColor(Color.BLACK);
   // 设置偏移量 不设置可能导致解析出错
   int pixoff = 2;
   // 输出内容 > 二维码
   if (contentBytes.length > 0 && contentBytes.length < 130) {
    boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);
    for (int i = 0; i < codeOut.length; i++) {
     for (int j = 0; j < codeOut.length; j++) {
      if (codeOut[j][i]) {
       gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);
      }
     }
    }
   } else {
    System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,130 ]. ");
   }
   /* 判断是否需要添加logo图片 */
   if(logoPath != null){
    File icon = new File(logoPath);
    if(icon.exists()){
     int width_4 = imgSize / 4;
     int width_8 = width_4 / 2;
     int height_4 = imgSize / 4;
     int height_8 = height_4 / 2;
     Image img = ImageIO.read(icon);
     gs.drawImage(img, width_4 + width_8, height_4 + height_8,width_4,height_4, null);
     gs.dispose();
     bufImg.flush();
    }else{
     System.out.println("Error: login图片不存在！");
    }

   }

   gs.dispose();
   bufImg.flush();
   //创建二维码文件
   File imgFile = new File(imgPath);
   if(!imgFile.exists())
    imgFile.createNewFile();
   //根据生成图片获取图片
   String imgType = imgPath.substring(imgPath.lastIndexOf(".") + 1, imgPath.length());
   // 生成二维码QRCode图片
   ImageIO.write(bufImg, imgType, imgFile);
   } catch (Exception e) {
    e.printStackTrace();
   }
 }

 /**
  * <span style="font-size:18px;font-weight:blod;">QRCode二维码解析</span>
  * @param codePath 二维码路径
  * @return 解析结果
  */
 public static String QRCodeAnalyze(String codePath) {
  File imageFile = new File(codePath);
  BufferedImage bufImg = null;
  String decodedData = null;
  try {
   if(!imageFile.exists())
    return "二维码不存在";
   bufImg = ImageIO.read(imageFile);

   QRCodeDecoder decoder = new QRCodeDecoder();
   decodedData = new String(decoder.decode(new ImageUtil(bufImg)), "gb2312");
  } catch (IOException e) {
   System.out.println("Error: " + e.getMessage());
   e.printStackTrace();
  } catch (DecodingFailedException dfe) {
   System.out.println("Error: " + dfe.getMessage());
   dfe.printStackTrace();
  }
  return decodedData;
 }

}

3、最后贴测试代码：

package test;

import java.awt.image.BufferedImage;
import java.io.InputStream;
import java.net.URL;

import javax.imageio.ImageIO;

import common.ImageUtil;
import common.QRCodeUtil;

import jp.sourceforge.qrcode.QRCodeDecoder;

/**
 * 二维码生成测试类
 * @author Cloud
 * @data 2016-11-21
 * QRCodeTest
 */

public class QRCodeTest {

 public static void main(String[] args) throws Exception {
  /**
   * QRcode 二维码生成测试
   * QRCodeUtil.QRCodeCreate("http://blog.csdn.net/u014266877", "E://qrcode.jpg", 15, "E://icon.png");
   */
  /**
   *  QRcode 二维码解析测试
   * String qrcodeAnalyze = QRCodeUtil.QRCodeAnalyze("E://qrcode.jpg");
   */
  /**
   * ZXingCode 二维码生成测试
   * QRCodeUtil.zxingCodeCreate("http://blog.csdn.net/u014266877", 300, 300, "E://zxingcode.jpg", "jpg");
   */
  /**
   * ZxingCode 二维码解析
   * String zxingAnalyze = QRCodeUtil.zxingCodeAnalyze("E://zxingcode.jpg").toString();
   */
  System.out.println("success");
 }
}