近期一直忙于开发微信商城项目,应客户要求,要开发个有图标的二维码。经过两次改版,终于实现了该功能(第一次没有小图标,这次才整合好的),如下是完整代码 。
该代码使用Java7开发,另外使用 core-2.2.jar jar[http://pan.baidu.com/s/1skTwHQ1] 包 。
package com.rick.common.utils; 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.Date;
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; /**
* 二维码生成工具类【带小图标】
* <br> QRCodeUtils 类的提升版本
* @author bxw
* @time 2016-07-17 22:13:45
* @version v1.1
*/
public class BarcodeFactory { /**
* 图片格式定义
* @value Array
*/
private static String[] IMAGE_TYPE = {"BMP", "bmp", "jpg", "JPG", "wbmp", "jpeg", "png", "PNG", "JPEG", "WBMP", "GIF", "gif","ICON","icon"}; /**
* 二维码宽度
*/
public static final int WIDTH = 260; /**
* 二维码高度
*/
public static final int HEIGHT = 260; /**
* 图标宽度
*/
private static final int IMAGE_WIDTH = 68;
/**
* 图标高度
*/
private static final int IMAGE_HEIGHT = 68;
/**
* 底图大小【正方形】
*/
private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;
/**
* 底图边框
*/
private static final int FRAME_WIDTH = 5; /**
* 二维码写码器
*/
private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); /**
* 二维码生成-方法入口
* @param content 内容
* @param width 宽度
* @param height 高度
* @param iconImagePath 图标原路径
* @param qrcodeImagePath 二维码存放路径
* @param hasFiller
* 比例不对时是否需要补白:true为补白; false为不补白
* @return
* 成功:返回输出图片绝对路径;失败:返回null
*/
public static String encode(String content, int width, int height,
String iconImagePath, String qrcodeImagePath,boolean hasFiller) {
try {
/**
* 图标格式校验
*/
File icon = new File(iconImagePath);
if(!icon.exists()){
System.err.println("系统找不到图标所在文件 !");
return null;
}
String iconFileName = icon.getName();
// 得到上传文件的扩展名
String fileExtName = iconFileName.substring(iconFileName.lastIndexOf(".") + 1);
if(!checkIMGType(fileExtName)){
System.err.println("图标格式有误 !");
return null;
} if(width<260||height<260){
width = BarcodeFactory.WIDTH;
height = BarcodeFactory.HEIGHT;
}
ImageIO.write(genBarcode(content, width, height, iconImagePath,hasFiller),
"png", new File(qrcodeImagePath));
System.err.println("二维码已生成 "+qrcodeImagePath);
return qrcodeImagePath;
} catch (IOException e) {
System.err.println("图片读取异常 : "+e.getMessage());
} catch (WriterException e) {
System.err.println("图片输出异常 :"+e.getMessage());
}
return null;
} /**
* 图片处理方法
* @param content
* @param width
* @param height
* @param iconImagePath
* @param hasFiller
* 比例不对时是否需要补白:true为补白; false为不补白;
* @return
* @throws WriterException
* @throws IOException
*/
private static BufferedImage genBarcode(String content, int width,
int height, String iconImagePath,boolean hasFiller) throws WriterException,
IOException {
// 读取源图像
BufferedImage scaleImage = scale(iconImagePath, IMAGE_WIDTH,
IMAGE_HEIGHT, hasFiller);
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 iconImagePath
* 小图标源文件地址
* @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 iconImagePath, int height,
int width, boolean hasFiller) throws IOException {
double ratio = 0.0; // 缩放比例
File file = new File(iconImagePath);
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;
System.err.println("INFO 图标补白已完成 ");
}
return (BufferedImage) destImage;
} /**
* 图片格式校验
* @param fileExtName
* @return
*/
private static boolean checkIMGType(String fileExtName){
boolean flag = false;
for (String type : IMAGE_TYPE) {
//-- 图片格式正确
if(type.toLowerCase().equals(fileExtName.toLowerCase())){
flag = true;
break;
}
}
//------------图片格式校验结束
return flag;
} /**
* 测试主方法入口
* @param args
*/
public static void main(String[] args) {
String codeIconPath = "C:/Users/rick/Desktop/1.jpg";
String codePath = "C:/Users/rick/Desktop/"+new Date().getTime()+".png"; /**
* 测试方法入口
*/
BarcodeFactory.encode("项目:晚餐定制",300, 300, codeIconPath, codePath,false);
}
}
著名: 代码只作为学习用途,谢谢 !