java给图片加水印代码

try {
String targetImg = "D:/Blue hills.jpg";
//			String pressImg = "D:/20130311220300.jpg";
String pressImg = "D:/html_original.jpg";

File f1 = new File(targetImg);
Image src = ImageIO.read(f1);
int width = src.getWidth(null);
int height = src.getHeight(null);

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g =  image.createGraphics();
g.drawImage(src, 0, 0, width, height, null);

File f2 = new File(pressImg);
Image src_pao = ImageIO.read(f2);
int width_pao = src_pao.getWidth(null);
int height_pao = src_pao.getHeight(null);
g.drawImage(src_pao, (width-+width_pao)/2, (height-height_pao)/2,width_pao,height_pao, null);
//			g.drawImage(src_pao, 100, 100,width,height, null);

g.dispose();
FileOutputStream out = new FileOutputStream(targetImg);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
System.out.println("水印添加成功!!");

} catch (Exception e) {
// TODO: handle exception
System.out.println("水印添加失败!!");
e.printStackTrace();
}