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                         二維碼的生成和解析(qrcode 和 zxing)

本文主要說明了 qrcode 和 zxing 兩種方式生成二維碼。原創,複製可用。直接上程式碼…

生成解析工具

package com.feng.work.util.qrcode;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.swetake.util.Qrcode;
import jp.sourceforge.qrcode.QRCodeDecoder;
import jp.sourceforge.qrcode.exception.DecodingFailedException;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* 二維碼生成工具類
*
* @author Xuefeng_Wen
* @data 2018-03-07
* QRCode
*/
public class QRCodeUtil {
//二維碼顏色
private static final int BLACK = 0xFF000000;
//二維碼顏色
private static final int WHITE = 0xFFFFFFFF;
/**
* <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二維碼</span>
*
* @param text       <a href="javascript:void();">二維碼內容</a>
* @param width      二維碼寬
* @param height     二維碼高
* @param outPutPath 二維碼生成儲存路徑
* @param imageType  二維碼生成格式
*/
public static void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType) {
Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
//設定編碼字符集
his.put(EncodeHintType.CHARACTER_SET, "utf-8");
try {
//1、生成二維碼
BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);
//2、獲取二維碼寬高
int codeWidth = encode.getWidth();
int codeHeight = encode.getHeight();
//3、將二維碼放入緩衝流
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、迴圈將二維碼內容定入圖片
image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
}
}
File outPutImage = new File(outPutPath);
//如果圖片不存在建立圖片
if (!outPutImage.exists())
outPutImage.createNewFile();
//5、將二維碼寫入圖片
ImageIO.write(image, imageType, outPutImage);
} catch (WriterException e) {
e.printStackTrace();
System.out.println("二維碼生成失敗");
} catch (IOException e) {
e.printStackTrace();
System.out.println("生成二維碼圖片失敗");
}
}
/**
* <span style="font-size:18px;font-weight:blod;">二維碼解析</span>
*
* @param analyzePath 二維碼路徑
* @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 "二維碼不存在";
}
BufferedImage image = ImageIO.read(file);
LuminanceSource source = new BufferedImageLuminanceSource(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 方式生成二維碼</span>
*
* @param content  二維碼內容
* @param imgPath  二維碼生成路徑
* @param version  二維碼版本
* @param logoPath 是否生成Logo圖片    為NULL不生成
*/
public static void QRCodeCreate(String content, String imgPath, int version, String logoPath) {
try {
Qrcode qrcodeHandler = new Qrcode();
//設定二維碼排錯率,可選L(7%) M(15%) Q(25%) H(30%),排錯率越高可儲存的資訊越少,但對二維碼清晰度的要求越小
qrcodeHandler.setQrcodeErrorCorrect('M');
//N代表數字,A代表字元a-Z,B代表其他字元
qrcodeHandler.setQrcodeEncodeMode('B');
//版本1為21*21矩陣,版本每增1,二維碼的兩個邊長都增4;所以版本7為45*45的矩陣;最高版本為是40,是177*177的矩陣
qrcodeHandler.setQrcodeVersion(version);
//根據版本計算尺寸
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);
// 設定影象顏色 > BLACK
gs.setColor(Color.BLACK);
// 設定偏移量 不設定可能導致解析出錯
int pixoff = 2;
// 輸出內容 > 二維碼
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 ]. ");
}
/* 判斷是否需要新增logo圖片 */
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圖片不存在!");
}
}
gs.dispose();
bufImg.flush();
//建立二維碼檔案
File imgFile = new File(imgPath);
if (!imgFile.exists())
imgFile.createNewFile();
//根據生成圖片獲取圖片
String imgType = imgPath.substring(imgPath.lastIndexOf(".")   1, imgPath.length());
// 生成二維碼QRCode圖片
ImageIO.write(bufImg, imgType, imgFile);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* <span style="font-size:18px;font-weight:blod;">QRCode二維碼解析</span>
*
* @param codePath 二維碼路徑
* @return 解析結果
*/
public static String QRCodeAnalyze(String codePath) {
File imageFile = new File(codePath);
BufferedImage bufImg = null;
String decodedData = null;
try {
if (!imageFile.exists())
return "二維碼不存在";
bufImg = ImageIO.read(imageFile);
QRCodeDecoder decoder = new QRCodeDecoder();
decodedData = new String(decoder.decode(new TwoDimensionCodeImage(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;
}
}

測試類

package com.feng.work.util.qrcode;
/**
* 二維碼生成測試類
*
* @author Xuefeng_Wen
* @data 2018-03-07
* QRCodeTest
*/
public class QRCodeTest {
public static void main(String[] args) throws Exception {
/** QRcode 二維碼生成測試 */
QRCodeUtil.QRCodeCreate("http://blog.csdn.net/eileen_crystal", "E://qrcode.jpg", 15, "E://icon.jpg");
/** QRcode 二維碼解析測試 */
String qrcodeAnalyze = QRCodeUtil.QRCodeAnalyze("E://qrcode.jpg");
System.out.println("qrcodeAnalyze----->"   qrcodeAnalyze);
/** ZXingCode 二維碼生成測試*/
QRCodeUtil.zxingCodeCreate("http://blog.csdn.net/eileen_crystal", 300, 300, "E://zxingcode.jpg", "jpg");
/** ZxingCode 二維碼解析 */
String zxingAnalyze = QRCodeUtil.zxingCodeAnalyze("E://zxingcode.jpg").toString();
System.out.println("zxingAnalyze----->"   zxingAnalyze);
System.out.println("success");
}
}

QRCode二維碼解析輔助類

package com.up72.work.util.qrcode;
import java.awt.image.BufferedImage;
import jp.sourceforge.qrcode.data.QRCodeImage;
/**
* 二維碼解析
*
* @author Xuefeng_Wen
* @data 2018-03-07
* TwoDimensionCodeImage
*/
public class TwoDimensionCodeImage implements QRCodeImage {
BufferedImage bufImg;
public TwoDimensionCodeImage(BufferedImage bufImg) {
this.bufImg = bufImg;
}
@Override
public int getHeight() {
return bufImg.getHeight();
}
@Override
public int getPixel(int x, int y) {
return bufImg.getRGB(x, y);
}
@Override
public int getWidth() {
return bufImg.getWidth();
}
}

以上程式碼經過測試可以,jar詳見 ↓

https://download.csdn.net/download/eileen_crystal/10274149