2021-07-06

**

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);
  }
  }

标签：06,String,param,imgPath,width,static,2021,import,07
来源： https://blog.csdn.net/weixin_45884188/article/details/118523409