Java 圖片添加水印效果

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;


/**
 * 在原圖片的基礎之上添加水印效果
 * 
 * 
 * 
 * @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";   
        // 給圖片添加水印   
        ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);   
        // 給圖片添加水印,水印旋轉-45   
        ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath2,   
                -45);   
  
    }   
  
    /**  
     * 給圖片添加水印  
     * @param iconPath 水印圖片路徑  
     * @param srcImgPath 源圖片路徑  
     * @param targerPath 目標圖片路徑  
     */  
    public static void markImageByIcon(String iconPath, String srcImgPath,   
            String targerPath) {   
        markImageByIcon(iconPath, srcImgPath, targerPath, null);   
    }   
  
    /**  
     * 給圖片添加水印、可設置水印圖片旋轉角度  
     * @param iconPath 水印圖片路徑  
     * @param srcImgPath 源圖片路徑  
     * @param targerPath 目標圖片路徑  
     * @param degree 水印圖片旋轉角度  
     */  
    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);   
  
            // 得到畫筆對象   
            // Graphics g= buffImg.getGraphics();   
            Graphics2D g = buffImg.createGraphics();   
  
            // 設置對線段的鋸齒狀邊緣處理   
            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) {   
                // 設置水印旋轉   
                g.rotate(Math.toRadians(degree),   
                        (double) buffImg.getWidth() / 2, (double) buffImg   
                                .getHeight() / 2);   
            }   
  
            // 水印圖象的路徑 水印一般為gif或者png的，這樣可設置透明度   
            ImageIcon imgIcon = new ImageIcon(iconPath);   
  
            // 得到Image對象。   
            Image img = imgIcon.getImage();   
  
            float alpha = 0.4f; // 透明度   
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,   
                    alpha));   
  
            // 表示水印圖片的位置   
            g.drawImage(img, 15, 30, null);   
  
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));   
  
            g.dispose();   
  
            os = new FileOutputStream(targerPath);   
  
            // 生成圖片   
            ImageIO.write(buffImg, "JPG", os);   
  
            System.out.println("圖片完成添加Icon印章。。。。。。");   
        } catch (Exception e) {   
            e.printStackTrace();   
        } finally {   
            try {   
                if (null != os)   
                    os.close();   
            } catch (Exception e) {   
                e.printStackTrace();   
            }   
        }   
    }   
}

 

 

效果圖: