【JAVA】使用ZXing生成嵌套图片的二维码
1.先下载zxing开发包，这里用到的只是core那个jar包
2.使用zxing开发还需要一个类，代码如下
package com.sudytech.zxing;
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;
public class ZXingTest {
// 图片宽度的一般
private static final int IMAGE_WIDTH = 60;
private static final int IMAGE_HEIGHT = 60;
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 main(String[] args) {
ZXingTest
.encode("weixin://wxpay/bizpayurl?appid=wxf8b4f85f3a794e77&noncestr=pyqHJLTwa2H3Vz3k&productid=abc&sign=6f19c6f90ace86f18c906c9ce2a5288e7ed7fd55×tamp=1432796925",
300, 300, "F:\\zxing\\LeeYefang.jpg",
"F:\\zxing\\ewm.jpg");
System.out.println("success");
}
/**
*
* @param content
* 二维码显示的文本
* @param width
* 二维码的宽度
* @param height
* 二维码的高度
* @param srcImagePath
* 中间嵌套的图片
* @param destImagePath
* 二维码生成的地址
*/
public static void encode(String content, int width, int height,
String srcImagePath, String destImagePath) {
try {
// ImageIO.write 参数 1、BufferedImage 2、输出的格式 3、输出的文件
ImageIO.write(genBarcode(content, width, height, srcImagePath), "jpg", new File(destImagePath));
} catch (IOException e) {
e.printStackTrace();
} catch (WriterException e) {
e.printStackTrace();
}
}
/**
* 得到BufferedImage
*
* @param content
* 二维码显示的文本
* @param width
* 二维码的宽度
* @param height
* 二维码的高度
* @param srcImagePath
* 中间嵌套的图片
* @return
* @throws WriterException
* @throws IOException
*/
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>();
// 设置编码格式
hint.put(EncodeHintType.CHARACTER_SET, "utf-8");
// 设置QR二维码的纠错级别——这里选择最高H级别
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 生成二维码，参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hint);
// 开始利用二维码数据创建Bitmap图片，分别设为黑白两色
// 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);
System.out.println(srcImage.getWidth() + " - " + srcImage.getHeight());
// 计算比例
if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {
if (srcImage.getHeight() > height) {
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;
}
}