标签:admin form boolean util bool equal creat log stp
pom.xml
<!-- 二维码生成 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.1.0</version> </dependency>
工具类
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 sun.misc.BASE64Encoder; import javax.imageio.ImageIO; import java.awt.*; import java.awt.geom.RoundRectangle2D; import java.awt.image.BufferedImage; import java.io.*; import java.util.Base64; import java.util.Hashtable; public class QrcodeUtil { private static final String CHARSET = "utf-8"; 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; public static void main(String[] args) { try { File file = new File("C:\\Users\\admin\\Desktop\\github.jpg"); InputStream inputStream = new FileInputStream(file); BufferedImage img = createImage("https://www.baidu.com",inputStream,true); // insertImage(img,inputStream,true); String b64 = bfimgToBase64(img); System.out.println("data:image/png;base64,"+b64); base64ToFile("C:\\Users\\admin\\Desktop",b64,"code.jpg"); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二维码 * @param content 二维码内容 * @param imgPath 二维码logo图片流文件 * @param needCompress logo是否压缩 * @return * @throws Exception */ public static BufferedImage createImage(String content, InputStream imgPath, boolean needCompress) throws Exception { Hashtable hints = new Hashtable(); 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; } QrcodeUtil.insertImage(image,imgPath,needCompress); return image; } public static String bfimgToBase64(BufferedImage bufferedImage){ String imgBase64 = null; try { ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); ImageIO.write(bufferedImage, "jpeg", outputStream); BASE64Encoder encoder = new BASE64Encoder(); imgBase64 = encoder.encode(outputStream.toByteArray()).trim().replaceAll("\\s", "").replaceAll("\r", "").replaceAll("\n", ""); } catch (Exception e) { e.printStackTrace(); } return imgBase64; } /** * * @param source 原图片文件 * @param inputStream 加载logo输入流 * @param needCompress 是否缩放 * @throws Exception */ public static void insertImage(BufferedImage source, InputStream inputStream, boolean needCompress) throws Exception { Image logoImage = ImageIO.read(inputStream); int width = logoImage.getWidth(null); int height = logoImage.getHeight(null); // 压缩LOGO if (needCompress) { if (width > WIDTH) { width = WIDTH; } if (height > HEIGHT) { height = HEIGHT; } Image image = logoImage.getScaledInstance(width, height, Image.SCALE_SMOOTH); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); // 绘制缩小后的图 g.drawImage(image, 0, 0, null); g.dispose(); logoImage = image; } // 插入LOGO Graphics2D graph = source.createGraphics(); int x = (QRCODE_SIZE - width) / 2; int y = (QRCODE_SIZE - height) / 2; graph.drawImage(logoImage, 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(); } /** *BASE64解码成File文件 */ public static void base64ToFile(String destPath,String base64, String fileName) { File file = null; //创建文件目录 String filePath=destPath; File dir=new File(filePath); if (!dir.exists() && !dir.isDirectory()) { dir.mkdirs(); } BufferedOutputStream bos = null; java.io.FileOutputStream fos = null; try { byte[] bytes = Base64.getDecoder().decode(base64); file=new File(filePath+"/"+fileName); fos = new java.io.FileOutputStream(file); bos = new BufferedOutputStream(fos); bos.write(bytes); } catch (Exception e) { e.printStackTrace(); } finally { if (bos != null) { try { bos.close(); } catch (IOException e) { e.printStackTrace(); } } if (fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
如果需要深度定制建议可浏览:https://blog.csdn.net/liuyueyi25/article/details/77131810
标签:admin form boolean util bool equal creat log stp
原文地址:https://www.cnblogs.com/SimonHu1993/p/10030363.html