用JAVA代码解析二维码

解析二维码

package net.qrcode.parse;

import java.awt.Graphics2D;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import com.google.zxing.LuminanceSource;

public class BufferedImageLuminanceSource extends LuminanceSource{

/**

* BufferedImage是Image的一个子类，BufferedImage生成的图片在内存里有一个图像缓冲区，

* 利用这个缓冲区我们可以很方便的操作这个图片，通常用来做图片修改操作如大小变换、图片变灰、设置图片透明或不透明等。

*/

private final BufferedImage image;

private final int left;

private final int top;

/**

* 构造方法

* @param image

*/

public BufferedImageLuminanceSource(BufferedImage image) {

this(image, 0, 0, image.getWidth(), image.getHeight());

}

/**

* 重载的构造方法

* @param image

* @param left

* @param top

* @param width

* @param height

*/

public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {

super(width, height);

/**

* 取出当前图片的宽度和高度

*/

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;

}

@Override

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;

}

@Override

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;

}

@Override

public boolean isCropSupported() {

return true;

}

@Override

public LuminanceSource crop(int left, int top, int width, int height) {

return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);

}

@Override

public boolean isRotateSupported() {

return true;

}

@Override

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);

}

}

测试

package net.qrcode.parse;

import java.awt.image.BufferedImage;

import java.io.File;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.imageio.ImageIO;

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.Result;

import com.google.zxing.common.HybridBinarizer;

public class Test {

public static void main(String[] args) {

try {

MultiFormatReader formatReader = new MultiFormatReader();

//用户选择一张图片，就将路径取出来存储在list中

String filePath = "C:\\Users\\Administrator\\Desktop\\二维码图片库\\1.jpg";

String filePath1 = "C:\\Users\\Administrator\\Desktop\\二维码图片库\\2.jpg";

//用来存储用户选择图片的路径

List list = new ArrayList();

list.add(filePath);

list.add(filePath1);

//判断用户所选择的是不是多个图片一起解析

for(int i = 0;i < list.size();i++)

{

File file = new File(list.get(i)+"");

BufferedImage image = ImageIO.read(file);;

// 将图像数据转换为1 bit data

LuminanceSource source = new BufferedImageLuminanceSource(image);

Binarizer binarizer = new HybridBinarizer(source);

// BinaryBitmap是ZXing用来表示1 bit data位图的类，Reader对象将对它进行解析

BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

//创建一个map集合

Map hints = new HashMap();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

// 对图像进行解码

Result result = formatReader.decode(binaryBitmap,hints);

System.out.println("result = "+ result.toString());

// System.out.println("resultFormat = "+ result.getBarcodeFormat());

// System.out.println("resultText = "+ result.getText());

}

}

catch (Exception e)

{

e.printStackTrace();

}

}

}