Java生成帶LOGO的二維碼

一，使用Java生成帶圖片（logo）二維碼

1，打開eclipse，新建一個Java項目，然后創建如下的項目結構：

App.java是主函數測試類，BufferedImageLuminanceSource類是必須使用的類，QRCodeUtil類是生成帶圖片的二維碼

2，下載一個core-3.0.0.jar包，參考地址：https://github.com/zxing/zxing/wiki/Getting-Started-Developing,

3，下載后，右鍵項目->build path->configure build path->libraries->add external jars...->選擇下載的core-3.0.0.jar，確定即可。

每個類的代碼如下：

1，BufferedImageLuminanceSource類：

package com.test;

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);
}
}

 

 

 2，QRCodeUtil類

package com.test;


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;

/**
* 二維碼工具類
* 
*/
public class QRCodeUtil {

private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
// 二維碼尺寸
private static int QRCODE_SIZE = 300;
// LOGO寬度
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;
}
// 插入圖片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}

/**
* 插入LOGO
* 
* @param source
* 二維碼圖片
* @param imgPath
* LOGO圖片地址
* @param needCompress
* 是否壓縮
* @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+" 該文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 壓縮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); // 繪制縮小后的圖
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();
}

/**
* 生成二維碼(內嵌LOGO)
* 
* @param content
* 內容
* @param imgPath
* LOGO地址
* @param destPath
* 存放目錄
* @param needCompress
* 是否壓縮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));
System.out.println("二維碼生成完畢！");
}

/**
* 當文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．(mkdir如果父目錄不存在則會拋出異常)
* @author lanyuan
* Email: [e-mail]
* @date 2013-12-11 上午10:16:36
* @param destPath 存放目錄
*/
public static void mkdirs(String destPath) {
File file =new File(destPath); 
//當文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．(mkdir如果父目錄不存在則會拋出異常)
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}

/**
* 生成二維碼(內嵌LOGO)
* 
* @param content
* 內容
* @param imgPath
* LOGO地址
* @param destPath
* 存儲地址
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath)
throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}

/**
* 生成二維碼
* 
* @param content
* 內容
* @param destPath
* 存儲地址
* @param needCompress
* 是否壓縮LOGO
* @throws Exception
*/
public static void encode(String content, String destPath,
boolean needCompress) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress);
}

/**
* 生成二維碼
* 
* @param content
* 內容
* @param destPath
* 存儲地址
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}

/**
* 生成二維碼(內嵌LOGO)
* 
* @param content
* 內容
* @param imgPath
* LOGO地址
* @param output
* 輸出流
* @param needCompress
* 是否壓縮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);
}

/**
* 生成二維碼
* 
* @param content
* 內容
* @param output
* 輸出流
* @throws Exception
*/
public static void encode(String content, OutputStream output)
throws Exception {
QRCodeUtil.encode(content, null, output, false);
}

/**
* 解析二維碼
* 
* @param file
* 二維碼圖片
* @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;
}

/**
* 解析二維碼
* 
* @param path
* 二維碼圖片地址
* @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.baidu.com";
QRCodeUtil.encode(text,"D:/MyWorkDoc/fangshou.jpeg","d:/MyWorkDoc",true);
}

}

在QRCodeUtil類的最后編寫一個main方法，測試生成的二維碼（帶logo圖片）

public static void main(String[] args) throws Exception {
String text = "http://www.baidu.com";
QRCodeUtil.encode(text,"D:/MyWorkDoc/fangshou.jpeg","d:/MyWorkDoc",true);  //text是文字內容；"D:/MyWorkDoc/fangshou.jpeg"這是logo圖片；"d:/MyWorkDoc"這是二維碼保存的位置；true決定是否壓縮。
}

生成的二維碼如下：

如果生成不帶logo圖片的二維碼，可以直接這樣寫：

public static void main(String[] args) throws Exception {
String text = "http://www.baidu.com";
QRCodeUtil.encode(text,"","d:/MyWorkDoc",true);   //logo圖片為空即可
}

不過QRCodeUtil類中，二維碼圖片的尺寸是寫死的，如果生成不帶logo的圖片，很多代碼是沒用的，於是我就簡單提取了一下代碼，放在 QRCodeTest類中：

代碼如下：

package com.test;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class QRCodeTest {

    public static  BufferedImage createImage(String content,
            boolean needCompress,int QRCODE_SIZE) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        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;
        }
        // 插入圖片
        QRCodeUtil.insertImage(image, imgPath, needCompress);*/
        return image;
    }
    
    /**
     * 當文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．(mkdir如果父目錄不存在則會拋出異常)
     * @author lanyuan
     * Email: [e-mail]
     * @date 2013-12-11 上午10:16:36
     * @param destPath 存放目錄
     */
    public static void mkdirs(String destPath) {
        File file =new File(destPath); 
        //當文件夾不存在時，mkdirs會自動創建多層目錄，區別於mkdir．(mkdir如果父目錄不存在則會拋出異常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }
    
     /**
     * 生成二維碼
     * 
     * @param content
     *   內容
     * @param destPath
     *   存放目錄
     * @param needCompress
     *   是否壓縮LOGO
     * @throws Exception
     */
     public static void encode(String content, String destPath,
                boolean needCompress,int QRCODE_SIZE) throws Exception {
            BufferedImage image = QRCodeTest.createImage(content,
                    needCompress, QRCODE_SIZE);
            mkdirs(destPath);
            String file = new Random().nextInt(99999999)+".jpg";
            ImageIO.write(image, "JPG", new File(destPath+"/"+file));
            System.out.println("二維碼生成完畢！");
        }
}

這里的代碼就比較少了，生成的二維碼是沒有logo圖片的，而且我把生成二維碼圖片的尺寸作為參數傳入方法中，這樣每次調用方法只需要輸入一個int類型的尺寸值就可以了

測試類如下：

package com.test;

public class App {

     public static void main(String[] args) throws Exception {
         String text = "http://www.baidu.com";
       QRCodeTest.encode(text,"d:/MyWorkDoc",true,200);
       }

}

生成的二維碼如下：

記錄一下，方便自己以后使用。也供大家參考。