微商水印怎么把二维码加上去(图片添加二维码水印教程)

用jdk awt实现图片加文字水印和图片水印的方法

一、图片文字水印

import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.Image;import java.awt.RenderingHints;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;import javax.imageio.ImageIO;import javax.swing.ImageIcon;public class WaterMarkIMGUtils { /** * @param args */ public static void main(String[] args) { String srcImgPath = "C:/Users/zhaoh/Desktop/test.jpg"; String targerPath1 = "C:/Users/zhaoh/Desktop/target1.jpg"; WaterMarkIMGUtils.setWaterMarkForIMGByFontString(srcImgPath, targerPath1, Color.blue, "公司内部资料"); } public static void setWaterMarkForIMGByFontString(String srcImgPath, String targerPath, Color markContentColor, String waterMarkContent){ OutputStream os = null; try { Image srcImg = ImageIO.read(new File(srcImgPath)); BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); // 得到画笔对象 Graphics2D g = buffImg.createGraphics(); // 设置对线段的锯齿状边缘处理 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null); Font font = new Font("宋体", Font.PLAIN, 20); g.setColor(markContentColor); // 根据图片的背景设置水印颜色 g.setFont(font); int srcImgWidth = srcImg.getWidth(null); int srcImgHeight = srcImg.getHeight(null); int waterMarkLength = g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length()); int x = srcImgWidth - waterMarkLength - 3; int y = srcImgHeight - 3; g.drawString(waterMarkContent, x, y); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); g.dispose(); os = new FileOutputStream(targerPath); // 生成图片 ImageIO.write(buffImg, "JPG", os); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != os) os.close(); } catch (Exception e) { e.printStackTrace(); } } }}

原来图片

微商水印怎么把二维码加上去

加上文字水印后图片

微商水印怎么把二维码加上去

二、图片加图片水印

import java.awt.AlphaComposite;import java.awt.Graphics2D;import java.awt.Image;import java.awt.RenderingHints;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;import javax.imageio.ImageIO;import javax.swing.ImageIcon;public class WaterMarkIMGUtils {/** * 给图片添加水印 * @param iconPath * 水印图片路径 * @param srcImgPath * 源图片路径 * @param targerPath * 目标图片路径 * @param imgType * 上传附件的类型 */ public static void setWaterMarkForIMGByIcon(BufferedImage bufferedImage, InputStream in, OutputStream os, String imgType) { setWaterMarkForIMG(iconPath, srcImgPath, targerPath, null, imgType); } /** * 给图片添加水印 * @date 2019年6月12日下午2:11:11 * @param iconPath * 水印图片路径 * @param srcImgPath * 源图片路径 * @param targerPath * 目标图片路径 * @param degree * 选择角度 * @param imgType * 上传附件的类型 */ public static void setWaterMarkForIMGByIcon(String iconPath, String srcImgPath, String targerPath, Integer degree,String imgType) { OutputStream os = null; try { Image srcImg = ImageIO.read(new File(srcImgPath)); BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); // 得到画笔对象 Graphics2D g = buffImg.createGraphics(); // 设置对线段的锯齿状边缘处理 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null); if (null != degree) { // 设置水印旋转 g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2); } // 水印图象的路径 水印一般为gif或者png的,这样可设置透明度 ImageIcon imgIcon = new ImageIcon(iconPath); // 得到Image对象。 Image img = imgIcon.getImage(); float alpha = 0.5f; // 透明度 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 表示水印图片的位置 g.drawImage(img, 150, 300, null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); g.dispose(); os = new FileOutputStream(targerPath); // 生成图片 ImageIO.write(buffImg, imgType, os); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != os) os.close(); } catch (Exception e) { e.printStackTrace(); } } } public static void main(String[] args) { String srcImgPath = "C:/Users/admin/Desktop/test.jpg"; String iconPath = "C:/Users/admin/Desktop/logo.png"; String targerPath1 = "C:/Users/admin/Desktop/target1.jpg"; String targerPath2 = "C:/Users/admin/Desktop/target2.jpg"; // 给图片添加水印 WaterMarkIMGUtils.setWaterMarkForIMGByIcon(iconPath, srcImgPath, targerPath1,"JPG"); // 给图片添加水印,水印旋转-10 WaterMarkIMGUtils.setWaterMarkForIMGByIcon(iconPath, srcImgPath, targerPath2, -10,"JPG"); }}

原来图片:

微商水印怎么把二维码加上去

水印图片:

微商水印怎么把二维码加上去

添加水印后的图片:

微商水印怎么把二维码加上去

拓展功能】

上面代码参考网上教程,很多地方都有分享代码,然后下面对其进行拓展

业务场景,基于图片加图片水印的功能,现在要求上传图片时候就给加上二维码,用户可以扫描二维码获取对应数据

首先二维码里面其实也就是一些数据,比如一个链接,或者一堆文字等等,这里可以通过Google开源的zxing库来事项生成二维码图片,然后附加到图片,形成水印

maven配置zxing对应jar:

com.google.zxing core 2.2 com.google.zxing javase 2.2

写个工具类用于生成二维码图片:

import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Hashtable;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;/** * 二维码生成工具类 */public class QrCodeUtils { /** * 生成二维码 * @author nicky.ma * @date 2019年6月11日下午4:39:16 * @param contents 二维码的内容 * @param width 二维码图片宽度 * @param height 二维码图片高度 */ public static BufferedImage createQrCodeBufferdImage(String contents, int width, int height){ Hashtable hints= new Hashtable(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); BufferedImage image = null; try { BitMatrix bitMatrix = new MultiFormatWriter().encode( contents,BarcodeFormat.QR_CODE, width, height, hints); image = toBufferedImage(bitMatrix); } catch (WriterException e) { e.printStackTrace(); } return image; } public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.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, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF); } } return image; }}

写个图片添加图片水印的工具类,代码仅供参考

注意:二维码要清晰度要求比较高,就不要设置透明效果了

import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.RenderingHints;import java.awt.image.BufferedImage;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import com.itextpdf.text.BadElementException;import com.itextpdf.text.DocumentException;import com.itextpdf.text.Rectangle;import com.itextpdf.text.pdf.PdfContentByte;import com.itextpdf.text.pdf.PdfGState;import com.itextpdf.text.pdf.PdfReader;import com.itextpdf.text.pdf.PdfStamper;import com.itextpdf.text.pdf.PdfStructTreeController.returnType;import com.itextpdf.text.pdf.parser.PdfImageObject.ImageBytesType;import com.stuff.stuffmanage.model.CommonStuffModel;/** * *

* 水印处理工具类.
* * * @author nicky.ma * @date 2019/06/11 */public class WaterMarkUtils { /** * 生成二维码 * @author nicky.ma * @date 2019年6月12日下午2:15:51 * @param commonStuffModel * @return */ private static BufferedImage createQrCodeImg(CommonStuffModel commonStuffModel){ StringBuffer strBuf = new StringBuffer(); strBuf.append("材料入库时间:").append(new SimpleDateFormat("yyyy-MM-dd").format(new Date())).append("\n"); strBuf.append("材料有效期:").append(commonStuffModel.getValidEndDateStr()).append("\n"); strBuf.append("材料名称:").append(commonStuffModel.getStuffName()).append("\n"); strBuf.append("材料目录:").append(commonStuffModel.getDirName()).append("\n"); strBuf.append("材料版本:").append(commonStuffModel.getVersion()).append("\n"); strBuf.append("出具单位:").append(commonStuffModel.getIssueUnit()).append("\n"); // 生成二维码 BufferedImage bufferedImage = QrCodeUtils.createQrCodeBufferdImage(strBuf.toString(), 175, 175); return bufferedImage; } /** * 图片附件添加二维码水印 * @author nicky.ma * @date 2019年6月12日下午2:13:29 * @param bos * 文件保存 IO stream * @param input * 获取文件上传IO stream * @param commonStuffModel * 公共材料库信息实体 * @param imgType * 附件类型 */ public static void setQrCodeForIMG(BufferedOutputStream bos, InputStream input, ApprCommonStuffModel apprCommonStuffModel, String imgType){ BufferedImage bufferedImage = createQrCodeImg(apprCommonStuffModel); //图片附件加上二维码水印 setWaterMarkForIMG(bufferedImage, input, bos, imgType); } /** * 给图片添加水印 * @param bufferedImage * 水印图片 * @param in * 获取附件上传stream * @param os * 附件保存stream * @param imgType * 上传附件的类型 */ public static void setWaterMarkForIMG(BufferedImage bufferedImage, InputStream in, OutputStream os, String imgType) { setWaterMarkForIMG(bufferedImage, in, os, null, imgType); } /** * 给图片添加水印、可设置水印图片旋转角度 * @author nicky.ma * @date 2019年6月12日下午2:11:11 * @param bufferedImage * 水印图片 * @param in * 获取附件上传stream * @param os * 附件保存stream * @param degree * 选择角度 * @param imgType * 上传附件的类型 */ public static void setWaterMarkForIMG(BufferedImage bufferedImage, InputStream in, OutputStream os, Integer degree,String imgType) { //OutputStream os = null; long startTime = System.currentTimeMillis(); System.out.println("图片附件添加图片水印 start"); try { Image srcImg = ImageIO.read(in); BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); // 得到画笔对象 Graphics2D g = buffImg.createGraphics(); // 设置对线段的锯齿状边缘处理 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null); if (null != degree) { // 设置水印旋转 g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2); } //float alpha = 0.2f; // 透明度 //g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 水印图象的路径 水印一般为gif或者png的,这样可设置透明度 //ImageIcon imgIcon = new ImageIcon(iconPath); // 得到Image对象。 //Image img = imgIcon.getImage(); // 表示水印图片的位置 g.drawImage(bufferedImage, buffImg.getWidth()-180, 0, null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); g.dispose(); //os = new FileOutputStream(targerPath); // 生成图片 ImageIO.write(buffImg, imgType, os); long endTime = System.currentTimeMillis(); System.out.println("图片附件添加图片水印 ok 所用时间:"+(endTime-startTime)+"s"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != os) os.close(); } catch (Exception e) { e.printStackTrace(); } } } }

对于上传的文件,我们怎么知道类型?如果用Spring提供的MultipartFile,这里可以获取ContentType来判断,这里只提供思路

/**文件类型集合*/ private static Map FILE_TYPES =new HashMap(); /**图片类型集合*/ private static Map IMG_TYPES = new HashMap(); static{ FILE_TYPES.put("xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");//xlsx FILE_TYPES.put("xls", "application/vnd.ms-excel");//xls FILE_TYPES.put("docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document");//docx FILE_TYPES.put("doc", "application/msword");//doc FILE_TYPES.put("jpg", "image/jpeg");//jpg FILE_TYPES.put("png", "image/png");//png FILE_TYPES.put("gif", "image/gif");//gif FILE_TYPES.put("bmp", "image/bmp");//bmp FILE_TYPES.put("txt", "text/plain");//txt FILE_TYPES.put("pdf", "application/pdf");//pdf FILE_TYPES.put("zip", "application/x-zip-compressed");//zip FILE_TYPES.put("rar", "application/octet-stream");//rar } static{ IMG_TYPES.put("jpg", "image/jpeg");//jpg IMG_TYPES.put("png", "image/png");//png IMG_TYPES.put("gif", "image/gif");//gif IMG_TYPES.put("bmp", "image/bmp");//bmp } /** * 校验上传附件是否为图片类型的 * @author nicky.ma * @date 2019年6月12日上午11:15:30 * @param fileContentType * response格式ContentType */ public static boolean checkContainImgType(String fileContentType){ if(!StringUtils.isEmpty(fileContentType)){ return IMG_TYPES.containsValue(fileContentType); } return false; } public static String loadFileType(String fileContentType){ for(Map.Entry entry : FILE_TYPES.entrySet()){ if(entry.getValue().equals(fileContentType)){ return entry.getKey(); } } return null; }

ok,生成二维码水印

微商水印怎么把二维码加上去

感谢 smileNicky !!!

原文:https://blog.csdn.net/u014427391/article/details/91653588

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