com.google.zxing图片叠加,二维码生成,图片加文字
1. <!-- 根据链接生成二维码 -->
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<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.3</version> </dependency></dependencies> |
2.util
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package com.xinlianpu.util;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import javax.imageio.ImageIO;import javax.imageio.stream.ImageOutputStream;import java.awt.*;import java.awt.image.BufferedImage;import java.io.*;import java.net.URL;import java.util.HashMap;import java.util.Map;import java.util.Objects;/** * Created by Mafy on 2019/5/9. */public class ZxingUtils { public static BufferedImage enQRCode(String contents, int width, int height) throws WriterException { //定义二维码参数 final Map<EncodeHintType, Object> hints = new HashMap(8) { { //编码 put(EncodeHintType.CHARACTER_SET, "UTF-8"); //容错级别 put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); //边距 put(EncodeHintType.MARGIN, 0); } }; return enQRCode(contents, width, height, hints); } /** * 生成二维码 * * @param contents 二维码内容 * @param width 图片宽度 * @param height 图片高度 * @param hints 二维码相关参数 * @return BufferedImage对象 * @throws WriterException 编码时出错 * @throws IOException 写入文件出错 */ public static BufferedImage enQRCode(String contents, int width, int height, Map hints) throws WriterException {// String uuid = UUID.randomUUID().toString().replace("-", ""); //本地完整路径// String pathname = path + "/" + uuid + "." + format; //生成二维码 BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);// Path file = new File(pathname).toPath(); //将二维码保存到路径下// MatrixToImageWriter.writeToPa(bitMatrix, format, file);// return pathname; return MatrixToImageWriter.toBufferedImage(bitMatrix); } /** * 将图片绘制在背景图上 * * @param backgroundPath 背景图路径 * @param zxingImage 图片 * @param x 图片在背景图上绘制的x轴起点 * @param y 图片在背景图上绘制的y轴起点 * @return */ public static BufferedImage drawImage(String backgroundPath, BufferedImage zxingImage, int x, int y) throws IOException { //读取背景图的图片流 BufferedImage backgroundImage; //Try-with-resources 资源自动关闭,会自动调用close()方法关闭资源,只限于实现Closeable或AutoCloseable接口的类 URL imgurl = new URL(backgroundPath);// try (InputStream imagein = new FileInputStream(backgroundPath)) {// backgroundImage = ImageIO.read(imagein);// } try (InputStream imagein = new BufferedInputStream(imgurl.openStream())) { backgroundImage = ImageIO.read(imagein); } return drawImage(backgroundImage, zxingImage, x, y); } /** * 将图片绘制在背景图上 * * @param backgroundImage 背景图 * @param zxingImage 图片 * @param x 图片在背景图上绘制的x轴起点 * @param y 图片在背景图上绘制的y轴起点 * @return * @throws IOException */ public static BufferedImage drawImage(BufferedImage backgroundImage, BufferedImage zxingImage, int x, int y) throws IOException { Objects.requireNonNull(backgroundImage, ">>>>>背景图不可为空"); Objects.requireNonNull(zxingImage, ">>>>>二维码不可为空"); //二维码宽度+x不可以超过背景图的宽度,长度同理 if ((zxingImage.getWidth() + x) > backgroundImage.getWidth() || (zxingImage.getHeight() + y) > backgroundImage.getHeight()) { throw new IOException(">>>>>二维码宽度+x不可以超过背景图的宽度,长度同理"); } //合并图片 Graphics2D g = backgroundImage.createGraphics(); g.drawImage(zxingImage, x, y, zxingImage.getWidth(), zxingImage.getHeight(), null); return backgroundImage; } /** * 将文字绘制在背景图上 * * @param backgroundImage 背景图 * @param x 文字在背景图上绘制的x轴起点 * @param y 文字在背景图上绘制的y轴起点 * @return * @throws IOException */ public static BufferedImage drawString(BufferedImage backgroundImage, String text, int x, int y,Font font,Color color) { //绘制文字 Graphics2D g = backgroundImage.createGraphics(); //设置颜色 g.setColor(color); //消除锯齿状 g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB); //设置字体 g.setFont(font); //绘制文字 g.drawString(text, x, y); return backgroundImage; } public static InputStream bufferedImageToInputStream(BufferedImage backgroundImage) throws IOException { return bufferedImageToInputStream(backgroundImage, "png"); } /** * backgroundImage 转换为输出流 * * @param backgroundImage * @param format * @return * @throws IOException */ public static InputStream bufferedImageToInputStream(BufferedImage backgroundImage, String format) throws IOException { ByteArrayOutputStream bs = new ByteArrayOutputStream(); try ( ImageOutputStream imOut = ImageIO.createImageOutputStream(bs)) { ImageIO.write(backgroundImage, format, imOut); InputStream is = new ByteArrayInputStream(bs.toByteArray()); return is; } } /** * 保存为文件 * * @param is * @param fileName * @throws IOException */ public static void saveFile(InputStream is, String fileName) throws IOException { try (BufferedInputStream in = new BufferedInputStream(is); BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(fileName))) { int len; byte[] b = new byte[1024]; while ((len = in.read(b)) != -1) { out.write(b, 0, len); } } } //读取远程url图片,得到宽高 public static int[] returnImgWH(URL url) { int[] a = new int[2]; BufferedImage bi = null; boolean imgwrong=false; try { //读取图片 bi = javax.imageio.ImageIO.read(url); try{ //判断文件图片是否能正常显示,有些图片编码不正确 int i = bi.getType(); imgwrong=true; }catch(Exception e){ imgwrong=false; } } catch (IOException ex) { ex.printStackTrace(); } if(imgwrong){ a[0] = bi.getWidth(); //获得 宽度 a[1] = bi.getHeight(); //获得 高度 }else{ a=null; } return a; } public static void main(String[] args) { //二维码宽度 int width = 293; //二维码高度 int height = 293; //二维码内容 String contcent = "http://192.168.4.162:8802/portal/courseActivity/detail?id=aed2fabfde70409ea0611d4eaf05dd6e:3b8b77dd-a63b-4555-abc0-2c0033af35be"; BufferedImage zxingImage = null; try { //二维码图片流 zxingImage = ZxingUtils.enQRCode(contcent, width, height); } catch (WriterException e) { e.printStackTrace(); } //背景图片地址 String backgroundPath = "http://test-dfs.enterfaces.com/M00/00/51/CgYBa1zRe4iAM5e9AAEUUh_Ua8g311.jpg"; InputStream inputStream = null; try { URL url = new URL(backgroundPath); int[] bb = returnImgWH(url); //合成二维码和背景图 BufferedImage image = ZxingUtils.drawImage(backgroundPath, zxingImage, bb[0]-width, bb[1]-height);// //-----------------------------------------绘制文字-----------------------------------------------------// Font font = new Font("微软雅黑", Font.BOLD, 35);// String text = "";// image = ZxingUtils.drawString(image, text, 375, 647,font,new Color(244,254,189));// //-----------------------------------------绘制文字----------------------------------------------------- //图片转inputStream inputStream = ZxingUtils.bufferedImageToInputStream(image); } catch (IOException e) { e.printStackTrace(); } //保存的图片路径 String originalFileName = "D://99999.png"; try { //保存为本地图片 ZxingUtils.saveFile(inputStream, originalFileName); } catch (IOException e) { e.printStackTrace(); } }} |
