JAVA二维码生成

摘要: JAVA二维码生成

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.geom.AffineTransform;

import java.awt.image.AffineTransformOp;

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 com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import com.sdy.huge.utils.file.AccessoryConfig;

/**

* @author ygd

*

*/

public class CodeFactory {

// 图片宽度的一般

private static final int IMAGE_WIDTH = 80;

private static final int IMAGE_HEIGHT = 80;

private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;

private static final int FRAME_WIDTH = 2;

// 二维码写码器

private static MultiFormatWriter mutiWriter = new MultiFormatWriter();

public static void encode(String content, int width, int height,

String srcImagePath, String destImagePath) {

try {

File f = new File(AccessoryConfig.path_absolute+AccessoryConfig.mem_ercod);

//不存在就創建

if(!f.exists()){

f.mkdirs();

}

ImageIO.write(genBarcode(content, width, height, srcImagePath),

"jpg", new File(destImagePath));

} catch (IOException e) {

e.printStackTrace();

} catch (WriterException e) {

e.printStackTrace();

}

}

private static BufferedImage genBarcode(String content, int width,

int height, String srcImagePath) throws WriterException,

IOException {

// 读取源图像

BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH,

IMAGE_HEIGHT, true);

int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];

for (int i = 0; i < scaleImage.getWidth(); i++) {

for (int j = 0; j < scaleImage.getHeight(); j++) {

srcPixels[i][j] = scaleImage.getRGB(i, j);

}

}

Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();

hint.put(EncodeHintType.CHARACTER_SET, "utf-8");

hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

// 生成二维码

BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,

width, height, hint);

// 二维矩阵转为一维像素数组

int halfW = matrix.getWidth() / 2;

int halfH = matrix.getHeight() / 2;

int[] pixels = new int[width * height];

for (int y = 0; y < matrix.getHeight(); y++) {

for (int x = 0; x < matrix.getWidth(); x++) {

// 读取图片

if (x > halfW - IMAGE_HALF_WIDTH

&& x < halfW + IMAGE_HALF_WIDTH

&& y > halfH - IMAGE_HALF_WIDTH

&& y < halfH + IMAGE_HALF_WIDTH) {

pixels[y * width + x] = srcPixels[x - halfW

+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];

}

// 在图片四周形成边框

else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH

&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH

&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH

+ IMAGE_HALF_WIDTH + FRAME_WIDTH)

|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH

&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH

&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH

+ IMAGE_HALF_WIDTH + FRAME_WIDTH)

|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH

&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH

&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH

- IMAGE_HALF_WIDTH + FRAME_WIDTH)

|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH

&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH

&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH

+ IMAGE_HALF_WIDTH + FRAME_WIDTH)) {

pixels[y * width + x] = 0xfffffff;

} else {

// 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；

pixels[y * width + x] = matrix.get(x, y) ? 0xff000000

: 0xfffffff;

}

}

}

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

image.getRaster().setDataElements(0, 0, width, height, pixels);

return image;

}

/**

* 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标

*

* @param srcImageFile

* 源文件地址

* @param height

* 目标高度

* @param width

* 目标宽度

* @param hasFiller

* 比例不对时是否需要补白：true为补白; false为不补白;

* @throws IOException

*/

private static BufferedImage scale(String srcImageFile, int height,

int width, boolean hasFiller) throws IOException {

double ratio = 0.0; // 缩放比例

File file = new File(srcImageFile);

BufferedImage srcImage = ImageIO.read(file);

Image destImage = srcImage.getScaledInstance(width, height,

BufferedImage.SCALE_SMOOTH);

// 计算比例

if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {

if (srcImage.getHeight() > srcImage.getWidth()) {

ratio = (new Integer(height)).doubleValue()

/ srcImage.getHeight();

} else {

ratio = (new Integer(width)).doubleValue()

/ srcImage.getWidth();

}

AffineTransformOp op = new AffineTransformOp(

AffineTransform.getScaleInstance(ratio, ratio), null);

destImage = op.filter(srcImage, null);

}

if (hasFiller) {// 补白

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics2D graphic = image.createGraphics();

graphic.setColor(Color.white);

graphic.fillRect(0, 0, width, height);

if (width == destImage.getWidth(null))

graphic.drawImage(destImage, 0,

(height - destImage.getHeight(null)) / 2,

destImage.getWidth(null), destImage.getHeight(null),

Color.white, null);

else

graphic.drawImage(destImage,

(width - destImage.getWidth(null)) / 2, 0,

destImage.getWidth(null), destImage.getHeight(null),

Color.white, null);

graphic.dispose();

destImage = image;

}

return (BufferedImage) destImage;

}

public static void main(String[] args) {

CodeFactory

.encode("http://www.baidu.com",

300, 300, "F:\\123.png", "F:\\456.jpg");

}

}