package com.blogs.image; 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.InputStream; import java.io.OutputStream; import javax.imageio.ImageIO; import javax.swing.ImageIcon; /**  * 图片水印  */ public class ImageUtil {     /**      * @param args      */     public static void main(String[] args) {         String srcImgPath = "e:/2.png";         String iconPath = "e:\\logo.jpg";         String targerPath = "e:/3.jpg";         // 给图片添加水印         ImageUtil.waterMarkImageByIcon(iconPath, srcImgPath, targerPath, 0, 0, , 0.1f);         // 给图片添加水印,水印旋转-45         // ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath,         // targerPath2, -45);     }     /**      * 给图片添加水印、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 targerPath      *            目标图片路径      * @param degree      *            水印图片旋转角度      * @param width      *            宽度(与左相比)      * @param height      *            高度(与顶相比)      * @param clarity      *            透明度(小于1的数)越接近0越透明      */     public static void waterMarkImageByIcon(String iconPath, String srcImgPath,             String targerPath, Integer degree, Integer width, Integer height,             float clarity) {         OutputStream os = null;         try {             Image srcImg = ImageIO.read(new File(srcImgPath));             System.out.println("width:" + srcImg.getWidth(null));             System.out.println("height:" + srcImg.getHeight(null));             BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),                     srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);             // 得到画笔对象             // Graphics g= buffImg.getGraphics();             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 = clarity; // 透明度             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,                     alpha));             // 表示水印图片的位置             g.drawImage(img, width, height, null);             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));             g.dispose();             os = new FileOutputStream(targerPath);             // 生成图片             ImageIO.write(buffImg, "JPG", os);             System.out.println("添加水印图片完成!");         } catch (Exception e) {             e.printStackTrace();         } finally {             try {                 if (null != os)                     os.close();             } catch (Exception e) {                 e.printStackTrace();             }         }     }     /**      * 给图片添加水印、可设置水印图片旋转角度      *      * @param logoText      *            水印文字      * @param srcImgPath      *            源图片路径      * @param targerPath      *            目标图片路径      * @param degree      *            水印图片旋转角度      * @param width      *            宽度(与左相比)      * @param height      *            高度(与顶相比)      * @param clarity      *            透明度(小于1的数)越接近0越透明      */     public static void waterMarkByText(String logoText, String srcImgPath,             String targerPath, Integer degree, Integer width, Integer height,             Float clarity) {         // 主图片的路径         InputStream is = null;         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             // Graphics g= buffImg.getGraphics();             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);             }             // 设置颜色             g.setColor(Color.red);             // 设置 Font             g.setFont(new Font("宋体", Font.BOLD, 30));             float alpha = clarity;             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,                     alpha));             // 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, width, height);             g.dispose();             os = new FileOutputStream(targerPath);             // 生成图片             ImageIO.write(buffImg, "JPG", os);             System.out.println("添加水印文字完成!");         } 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();             }         }     } }

/**      * 图片缩放(图片等比例缩放为指定大小，空白部分以白色填充)      *      * @param srcPath      *            源图片路径      * @param destPath      *            缩放后图片路径      */     public static void zoomImage(String srcPath, String destPath, int destHeight, int destWidth) {         try {             BufferedImage srcBufferedImage = ImageIO.read(new File(srcPath));             int imgWidth = destWidth;             int imgHeight = destHeight;             int srcWidth = srcBufferedImage.getWidth();             int srcHeight = srcBufferedImage.getHeight();             if (srcHeight >= srcWidth) {                 imgWidth = (int) Math.round(((destHeight * 1.0 / srcHeight) * srcWidth));             } else {                 imgHeight = (int) Math.round(((destWidth * 1.0 / srcWidth) * srcHeight));             }             BufferedImage destBufferedImage = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);             Graphics2D graphics2D = destBufferedImage.createGraphics();             graphics2D.setBackground(Color.WHITE);             graphics2D.clearRect(0, 0, destWidth, destHeight);             graphics2D.drawImage(srcBufferedImage.getScaledInstance(imgWidth, imgHeight, Image.SCALE_SMOOTH), (destWidth / 2) - (imgWidth / 2), (destHeight / 2) - (imgHeight / 2), null);             graphics2D.dispose();             ImageIO.write(destBufferedImage, "JPEG", new File(destPath));         } catch (IOException e) {             e.printStackTrace();         }     }