**
二维码内嵌LOGO生成工具类
**
package common.projects.develop.util;
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;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Hashtable;
/**
-
二维码生成工具类
*/
public class CoreCodeUtil {
//编码格式为 utf-8
private static final String CHARSET = “utf-8”;
//生成二维码后图片的类型为 jpg
private static final String FORMAT_NAME = “JPG”;
// 二维码尺寸
private static final int QRCODE_SIZE = 300;
// LOGO宽度
private static final int WIDTH = 60;
// LOGO高度
private static final int HEIGHT = 60;/**
- 生成二维码图片信息
- @param content 内容
- @param imgPath 图片链接地址
- @param needCompress 是否需要对生成的图片进行缩放处理
- @return
- @throws Exception
*/
private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
//完善编码类型
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;
}
// 插入图片
insertImage(image, imgPath, needCompress);
return image;
}
/**
- 内置二维码图片
- @param source 二维码图片
- @param imgPath logo图片
- @param needCompress 是否对logo图标进行缩放处理
- @throws Exception
*/
private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
File file = new File(imgPath);
//判断文件否存在
if (!file.exists()) {
System.err.println(""+imgPath+“该文件不存在!”);
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩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); // 绘制缩小后的图
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();
}
/**
- 生成二维码的调用方法
- @param content 内容
- @param imgPath logo地址
- @param destPath 生成后文件存储的地址
- @param needCompress 是否需要对logo图标进行缩放处理
- @return
- @throws Exception
*/
public static void encode(String content, String imgPath, String destPath,boolean needCompress) throws Exception {
BufferedImage image = createImage(content, imgPath,needCompress);
createMkdirs(destPath); //判断文件是否存在
System.out.println("[生成二维码]: content “+content+” destPath+/+file = “+destPath);
String fileName = RandomUtil.generateLowerString(6)+”.jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath+fileName));
}
/**
- 判断文件是否存在 如果存在则如果不存在则创建
- @param destPath
*/
public static void createMkdirs(String destPath) {
File file =new File(destPath);
//当文件夹不存在或者文件不是一个目录时
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
- 通过网址远程拉取文件转换为inputStream流
- @param fileUrl
- @return
- @throws IOException
*/
public static InputStream fileInputStream(String fileUrl) throws IOException {
URL url = new URL(fileUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.connect();
return connection.getInputStream();
}
public static void main(String[] args) throws Exception {
String BASE_PATH = “C:\Users\31034\OneDrive\logo.jpg”;
encode(“http://gs1.hzxihulongjing.xyz/”,BASE_PATH,“C:\Users\31034\Desktop\科元\”,true);
}
}