为图片添加水印的源码

package tImageMarkLogoByIcon; 
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; 
/** 
 _ 图片水印 
 _/ 
public class ImageMarkLogoByIcon { 
    /** 
     _ @param args 
     _/ 
    public static void main(String[] args) { 
        String srcImgPath = "d:/9a51a75b5dceff2519b3fa5bf463d006.jpg";//源图片路径
        String iconPath = "d:/shuiying.png";//水印图路径
        String targerPath = "d:/1.jpg";//水印图片生成路径
        String targerPath2 = "d:/2.jpg";//旋转水印图片生成路径
        // 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, 75, 150, 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(buffImg);

        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(); 
        } 
    } 
} 

}