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;
 

 
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;
 
 
 public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType){
  Map his = new HashMap();
  //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");
  }
 }
 
 
 @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;
 }
 
 
 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 ]. "); 
   }
   
   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(); 
   }
 }
 
 
 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;
 

 
public class QRCodeTest {
 
 public static void main(String[] args) throws Exception {
  
  
  
  
  System.out.println("success");
 }
}