package michael.io.image;   

 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.FileInputStream;

 import java.io.FileOutputStream;

 import java.io.InputStream;

 import java.io.OutputStream;   

 import javax.imageio.ImageIO;

 import javax.swing.ImageIcon;   

 import com.sun.image.codec.jpeg.JPEGCodec;

 import com.sun.image.codec.jpeg.JPEGImageDecoder;

 import com.sun.image.codec.jpeg.JPEGImageEncoder;   

 /**

  * 图片水印

  * @blog http://sjsky.iteye.com

  * @author Michael

  */

 public class ImageMarkLogoByIcon {   

     /**

      * @param args

      */

     public static void main(String[] args) {

         String srcImgPath = "d:/test/michael/myblog_01.png";

         String iconPath = "d:/test/michael/blog_logo.png";

         String targerPath = "d:/test/michael/img_mark_icon.jpg";

         String targerPath2 = "d:/test/michael/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 = 0.5f; // 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, "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();

             }

         }

     }

 }