java生成带logo的二维码
随着微信在市场上的占有率不对升高，二维码开始逐渐进入人们的视野，扫码支付，扫码关注，扫码打开连接...
究竟二维码是个什么东西我就不在这里赘述了，关于这方面大家可以去上搜索引擎
我在这里就简单介绍一下一个Java的生成二维码工具，是Google提供的，zxing
上代码,
1 package com.xxxx.xx; 2 3 import java.awt.Color; 4 import java.awt.Font; 5 import java.awt.Graphics2D; 6 import java.awt.image.BufferedImage; 7 import java.io.File; 8 import java.util.HashMap; 9 import java.util.Map; 10 import java.util.Objects; 11 12 import javax.imageio.ImageIO; 13 14 import org.apache.commons.lang3.StringUtils; 15 16 import com.google.zxing.BarcodeFormat; 17 import com.google.zxing.EncodeHintType; 18 import com.google.zxing.MultiFormatWriter; 19 import com.google.zxing.WriterException; 20 import com.google.zxing.common.BitMatrix; 21 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; 22 23 /** 24 * 画制定logo和制定描述的二维码 25 * 26 * @author songyz 27 * 28 */ 29 public class ZXingCode { 30 private static final int QRCOLOR = 0xFF000000; // 默认是黑色 31 private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色 32 33 private static final int WIDTH = 400; // 二维码宽 34 private static final int HEIGHT = 400; // 二维码高 35 36 // 用于设置QR二维码参数 37 private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() { 38 private static final long serialVersionUID = 1L; 39 { 40 put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 设置QR二维码的纠错级别（H为最高级别）具体级别信息 41 put(EncodeHintType.CHARACTER_SET, "utf-8");// 设置编码方式 42 put(EncodeHintType.MARGIN, 0); 43 } 44 }; 45 46 public static void main(String[] args) throws WriterException { 47 File logoFile = new File("D://QrCode/logo3.png"); 48 File QrCodeFile = new File("D://QrCode/05.png"); 49 String url = "https://www.baidu.com/"; 50 String note = "访问百度连接"; 51 drawLogoQRCode(logoFile, QrCodeFile, url, note); 52 } 53 54 // 生成带logo的二维码图片 55 public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl, String note) { 56 try { 57 MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); 58 // 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 59 BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints); 60 BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); 61 62 // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色 63 for (int x = 0; x < WIDTH; x++) { 64 for (int y = 0; y < HEIGHT; y++) { 65 image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE); 66 } 67 } 68 69 int width = image.getWidth(); 70 int height = image.getHeight(); 71 if (Objects.nonNull(logoFile) && logoFile.exists()) { 72 // 构建绘图对象 73 Graphics2D g = image.createGraphics(); 74 // 读取Logo图片 75 BufferedImage logo = ImageIO.read(logoFile); 76 // 开始绘制logo图片 77 g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null); 78 g.dispose(); 79 logo.flush(); 80 } 81 82 // 自定义文本描述 83 if (StringUtils.isNotEmpty(note)) { 84 // 新的图片，把带logo的二维码下面加上文字 85 BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR); 86 Graphics2D outg = outImage.createGraphics(); 87 // 画二维码到新的面板 88 outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null); 89 // 画文字到新的面板 90 outg.setColor(Color.BLACK); 91 outg.setFont(new Font("楷体", Font.BOLD, 30)); // 字体、字型、字号 92 int strWidth = outg.getFontMetrics().stringWidth(note); 93 if (strWidth > 399) { 94 // //长度过长就截取前面部分 95 // 长度过长就换行 96 String note1 = note.substring(0, note.length() / 2); 97 String note2 = note.substring(note.length() / 2, note.length()); 98 int strWidth1 = outg.getFontMetrics().stringWidth(note1); 99 int strWidth2 = outg.getFontMetrics().stringWidth(note2); 100 outg.drawString(note1, 200 - strWidth1 / 2, height + (outImage.getHeight() - height) / 2 + 12); 101 BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR); 102 Graphics2D outg2 = outImage2.createGraphics(); 103 outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null); 104 outg2.setColor(Color.BLACK); 105 outg2.setFont(new Font("宋体", Font.BOLD, 30)); // 字体、字型、字号 106 outg2.drawString(note2, 200 - strWidth2 / 2,outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5); 107 outg2.dispose(); 108 outImage2.flush(); 109 outImage = outImage2; 110 } else { 111 outg.drawString(note, 200 - strWidth / 2, height + (outImage.getHeight() - height) / 2 + 12); // 画文字 112 } 113 outg.dispose(); 114 outImage.flush(); 115 image = outImage; 116 } 117 118 image.flush(); 119 120 ImageIO.write(image, "png", codeFile); // TODO 121 } catch (Exception e) { 122 e.printStackTrace(); 123 } 124 } 125 126 }
效果如下
