Java 图片添加水印效果

落日映苍穹つ 2022-04-25 05:18 420阅读 0赞

package com.xiaowu.drawwater.demo;
    
    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;
    
    
    /**
     * 在原图片的基础之上添加水印效果
     * 
     * 
     * 
     * @author WQ
     *
     */
    public class ImageMarkLogoByIcon {
    
        /**  
         * @param args  
         */  
        public static void main(String[] args) {   
            String srcImgPath = "D:/Test123/car.png";   
            String iconPath = "D:/Test123/deal.png";   
            String targerPath = "D:/Test123/img_mark_icon.jpg";   
            String targerPath2 = "D:/Test123/img_mark_icon_rotate.jpg";   
            // 给图片添加水印   
            ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);   
            // 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  
         * @param iconPath 水印图片路径  
         * @param srcImgPath 源图片路径  
         * @param targerPath 目标图片路径  
         */  
        public static void markImageByIcon(String iconPath, String srcImgPath,   
                String targerPath) {   
            markImageByIcon(iconPath, srcImgPath, targerPath, null);   
        }   
      
        /**  
         * 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  
         */  
        public static void markImageByIcon(String iconPath, String srcImgPath,   
                String targerPath, Integer degree) {   
            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);   
                }   
      
                // 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 = 0.4f; // 透明度   
                g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,   
                        alpha));   
      
                // 表示水印图片的位置   
                g.drawImage(img, 15, 30, 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("图片完成添加Icon印章。。。。。。");   
            } catch (Exception e) {   
                e.printStackTrace();   
            } finally {   
                try {   
                    if (null != os)   
                        os.close();   
                } catch (Exception e) {   
                    e.printStackTrace();   
                }   
            }   
        }   
    }

效果图:

![img_9c7bf1200e8021d4b1f2c12907c4b78a.png][]

[img_9c7bf1200e8021d4b1f2c12907c4b78a.png]: /images/20220205/79b6898fbf9b43e3961b2c529dc96679.png