添加水印
本地图片、网络图片添加文字水印、图片水印
package com.utils;import org.apache.commons.lang3.StringUtils;import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;/*** 图片水印** @author: hmm* @date: 2020/11/18 13:33*/
public class WatermarkUtil {//TODO：*************************************************************** 本地图片 *********************************************************/*** 给图片添加图片水印、可设置水印图片旋转角度** @param iconPath 水印图片路径* @param srcImgPath 源图片路径* @param targetPath 目标图片路径* @param degree 水印图片旋转角度* @param formatName 目标图片格式*/public static void markImageByIcon(String iconPath, String srcImgPath, String targetPath, Integer degree, String formatName) {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);int srcWidth = srcImg.getWidth(null);int srcHeight = srcImg.getHeight(null);// 1、得到画笔对象Graphics2D g = buffImg.createGraphics();// 2、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);// 3、设置水印旋转if (null != degree) {g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);}// 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度ImageIcon imgIcon = new ImageIcon(iconPath);// 5、得到Image对象。Image img = imgIcon.getImage();int iconWidth = img.getWidth(null);int iconHeight = img.getHeight(null);if (iconWidth < 0 || iconHeight < 0) {System.out.println("无法获取到水印图片，请确认 " + iconPath + " 路径是否存在水印图片！！");}double dmarkWidth = srcWidth * 0.8;// 设置水印的宽度为图片宽度的0.4倍double dmarkHeight = dmarkWidth * ((double) iconWidth / (double) iconHeight);//强转为double计算宽高比例int imarkWidth = (int) dmarkWidth;int imarkHeight = (int) dmarkHeight;// 6、水印图片的位置int x = (srcWidth - imarkWidth) / 2;int y = (srcHeight - imarkHeight) / 2;g.drawImage(img, x, y, imarkWidth, imarkHeight, null);g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));// 7、释放资源g.dispose();// 8、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);System.out.println("[添加水印]图片完成添加水印图片");} catch (Exception e) {e.printStackTrace();System.out.println("[添加水印] Exception, message=" + e.getMessage());} finally {try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}}/*** @param logoText 水印文字* @param srcImgPath 源图片路径* @param targetPath 目标图片路径* @param degree 水印文字旋转角度* @param color 水印文字颜色* @param formatName 文件后缀格式*/public static void markImageByText(String logoText, String srcImgPath, String targetPath, Integer degree, Color color, String formatName) {InputStream is = null;OutputStream os = null;try {// 1、源图片Image srcImg = ImageIO.read(new File(srcImgPath));BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);// 2、得到画笔对象Graphics2D g = buffImg.createGraphics();// 3、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);// 4、设置水印旋转if (null != degree) {g.rotate(Math.toRadians(degree), buffImg.getWidth() / 4, buffImg.getHeight() / 4);}// 5、设置水印文字颜色g.setColor(color);// 6、设置水印文字Fontg.setFont(new Font("宋体", Font.BOLD, buffImg.getHeight() / 6));// 7、设置水印文字透明度g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
// g.drawString(logoText, buffImg.getWidth()/2 , buffImg.getHeight()/2);g.drawString(logoText, buffImg.getWidth() / 4, buffImg.getHeight() / 4);// 9、释放资源g.dispose();// 10、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);} catch (Exception e) {e.printStackTrace();} finally {try {if (null != is)is.close();} catch (Exception e) {e.printStackTrace();}try {if (null != os)os.close();} catch (Exception e) {e.printStackTrace();}}}/*** @param logoText 水印文字* @param srcImgPath 源图片路径* @param targetPath 目标图片路径* @param color 水印文字颜色* @param formatName 文件后缀格式*/public static void markImageByText(String logoText, String srcImgPath, String targetPath, Color color, String formatName) {InputStream is = null;OutputStream os = null;try {// 1、源图片Image srcImg = ImageIO.read(new File(srcImgPath));BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);// 2、得到画笔对象Graphics2D g = buffImg.createGraphics();// 3、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);// 5、设置水印文字颜色g.setColor(color);// 6、设置水印文字Fontg.setFont(new Font("宋体", Font.BOLD, buffImg.getHeight() / 6));// 7、设置水印文字透明度g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
// g.drawString(logoText, buffImg.getWidth()/2 , buffImg.getHeight()/2);g.drawString(logoText, buffImg.getWidth() / 4, buffImg.getHeight() / 4);// 9、释放资源g.dispose();// 10、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);} catch (Exception e) {e.printStackTrace();} finally {try {if (null != is) {is.close();}} catch (Exception e) {e.printStackTrace();}try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}}//TODO：*************************************************************** 网络图片 *********************************************************/*** 给图片添加图片水印、可设置水印图片旋转角度** @param iconPath 水印图片路径* @param srcImgPath 网络图片url* @param targetPath 目标图片路径* @param degree 水印图片旋转角度* @param formatName 目标图片格式*/public static void markWebImageByIcon(String iconPath, String srcImgPath, String targetPath, Integer degree, String formatName) {OutputStream os = null;try {Image srcImg = ImageIO.read(WatermarkUtil.getImageStream(srcImgPath));BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);int srcWidth = srcImg.getWidth(null);int srcHeight = srcImg.getHeight(null);// 1、得到画笔对象Graphics2D g = buffImg.createGraphics();// 2、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);// 3、设置水印旋转if (null != degree) {g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);}// 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度ImageIcon imgIcon = new ImageIcon(iconPath);// 5、得到Image对象。Image img = imgIcon.getImage();int iconWidth = img.getWidth(null);int iconHeight = img.getHeight(null);if (iconWidth < 0 || iconHeight < 0) {System.out.println("无法获取到水印图片，请确认 " + iconPath + " 路径是否存在水印图片！！");}double dmarkWidth = srcWidth * 0.8;// 设置水印的宽度为图片宽度的0.4倍double dmarkHeight = dmarkWidth * ((double) iconWidth / (double) iconHeight);//强转为double计算宽高比例int imarkWidth = (int) dmarkWidth;int imarkHeight = (int) dmarkHeight;// 6、水印图片的位置int x = (srcWidth - imarkWidth) / 2;int y = (srcHeight - imarkHeight) / 2;g.drawImage(img, x, y, imarkWidth, imarkHeight, null);g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));// 7、释放资源g.dispose();// 8、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);System.out.println("[添加水印]图片完成添加水印图片");} catch (Exception e) {e.printStackTrace();System.out.println("[添加水印] Exception, message=" + e.getMessage());} finally {try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}}/*** @param logoText 水印文字* @param srcImgPath 网络图片url* @param targetPath 目标图片路径* @param degree 水印文字旋转角度* @param color 水印文字颜色* @param formatName 文件后缀格式*/public static void markWebImageByText(String logoText, String srcImgPath, String targetPath, Integer degree, Color color, String formatName) {InputStream is = null;OutputStream os = null;try {// 1、源图片Image srcImg = ImageIO.read(WatermarkUtil.getImageStream(srcImgPath));BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);// 2、得到画笔对象Graphics2D g = buffImg.createGraphics();// 3、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);// 4、设置水印旋转if (null != degree) {g.rotate(Math.toRadians(degree), buffImg.getWidth() / 4, buffImg.getHeight() / 4);}// 5、设置水印文字颜色g.setColor(color);// 6、设置水印文字Fontg.setFont(new Font("宋体", Font.BOLD, buffImg.getHeight() / 6));// 7、设置水印文字透明度g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
// g.drawString(logoText, buffImg.getWidth()/2 , buffImg.getHeight()/2);g.drawString(logoText, buffImg.getWidth() / 4, buffImg.getHeight() / 4);// 9、释放资源g.dispose();// 10、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);} catch (Exception e) {e.printStackTrace();} finally {try {if (null != is)is.close();} catch (Exception e) {e.printStackTrace();}try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}}/*** * @param logoText 水印文字* @param srcImgPath 网络图片url* @param targetPath 目标图片路径* @param color 水印文字颜色* @param formatName 文件后缀格式*/public static void markWebImageByText(String logoText, String srcImgPath, String targetPath, Color color, String formatName) {InputStream is = null;OutputStream os = null;try {// 1、源图片：通过url获取网络文件流Image srcImg = ImageIO.read(WatermarkUtil.getImageStream(srcImgPath));BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);// 2、得到画笔对象Graphics2D g = buffImg.createGraphics();// 3、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);// 5、设置水印文字颜色g.setColor(color);// 6、设置水印文字Fontg.setFont(new Font("宋体", Font.BOLD, buffImg.getHeight() / 6));// 7、设置水印文字透明度g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
// g.drawString(logoText, buffImg.getWidth()/2 , buffImg.getHeight()/2);g.drawString(logoText, buffImg.getWidth() / 4, buffImg.getHeight() / 4);// 9、释放资源g.dispose();// 10、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);} catch (Exception e) {e.printStackTrace();} finally {try {if (null != is) {is.close();}} catch (Exception e) {e.printStackTrace();}try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}}/*** 获取网络图片流** @param url* @return*/private static InputStream getImageStream(String url) {try {HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();connection.setReadTimeout(5000);connection.setConnectTimeout(5000);connection.setRequestMethod("GET");if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {InputStream inputStream = connection.getInputStream();return inputStream;}} catch (IOException e) {System.out.println("获取网络图片出现异常，图片路径为：" + url);e.printStackTrace();}return null;}//TODO：*************************************************************** 本地图片 *********************************************************/*** 给图片添加图片水印、可设置水印图片旋转角度** @param iconPath 水印图片路径* @param srcImage 源图片文件流* @param targetPath 目标图片路径* @param degree 水印图片旋转角度* @param formatName 目标图片格式*/public static boolean markImageByIcon(String iconPath, InputStream srcImage, String targetPath, Integer degree, String formatName) {if (StringUtils.isBlank(iconPath) || StringUtils.isBlank(targetPath) || StringUtils.isBlank(formatName)) {return false;}OutputStream os = null;try {Image srcImg = ImageIO.read(srcImage);BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);int srcWidth = srcImg.getWidth(null);int srcHeight = srcImg.getHeight(null);// 1、得到画笔对象Graphics2D g = buffImg.createGraphics();// 2、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);// 3、设置水印旋转if (null != degree) {g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);}// 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度ImageIcon imgIcon = new ImageIcon(iconPath);// 5、得到Image对象。Image img = imgIcon.getImage();int iconWidth = img.getWidth(null);int iconHeight = img.getHeight(null);double dmarkWidth = srcWidth * 0.9;// 设置水印的宽度为图片宽度的0.9倍double dmarkHeight = dmarkWidth * ((double) iconWidth / (double) iconHeight);//强转为double计算宽高比例int imarkWidth = (int) dmarkWidth;int imarkHeight = (int) dmarkHeight;// 6、水印图片的位置int x = (srcWidth - imarkWidth) / 2;int y = (srcHeight - imarkHeight) / 2;g.drawImage(img, x, y, imarkWidth, imarkHeight, null);g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));// 7、释放资源g.dispose();// 8、生成图片os = new FileOutputStream(targetPath);ImageIO.write(buffImg, formatName, os);return true;} catch (Exception e) {e.printStackTrace();} finally {try {if (null != os) {os.close();}} catch (Exception e) {e.printStackTrace();}}return false;}public static void main(String[] args) {String fileType = "jpg";String absolutePath = "D://test/01.jpg";String iconPath = "D://test/icon.png";String targetPath = "D://test/";// 文字水印WatermarkUtil.markImageByText("文字水印", absolutePath, targetPath + "textwater.jpg", Color.BLUE, fileType);// 图片水印WatermarkUtil.markImageByIcon(iconPath, absolutePath, targetPath + "iconwater.jpg", null, fileType);String url = "http://10.0.0.0:8080/image/202106011442318460.jpg";// 文字水印WatermarkUtil.markWebImageByText("文字水印", url, targetPath + "textwater2.jpg", Color.BLUE, fileType);// 图片水印WatermarkUtil.markWebImageByIcon(iconPath, url, targetPath + "iconwater2.jpg", null, fileType);}}
参考：
java 根据网络图片url获取InputStream