【转】图片加水印

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public class Graphics {

       /**
* 图片加水印的方法
* @param waterMask 水印图片的地址
* @param picturePath 要加水印的图片地址
* @param newPicturePath 得到新图片的地址
* @return 得到新图片的地址
*/
@SuppressWarnings("static-access")
public static void WaterMask(String waterMask,String picturePath,String newPicturePath){

   //先画出原图的
     ImageIcon imgIcon = new ImageIcon(picturePath);
      Image theImg = imgIcon.getImage();
      int width = theImg.getWidth(null);
      int height = theImg.getHeight(null);

      BufferedImage bimage = new BufferedImage(width, height, 1);
      Graphics2D g = bimage.createGraphics();
      //g.setBackground(Color.white);

      g.drawImage(theImg, 0, 0, null);

      //再画出水印
      ImageIcon waterIcon = new ImageIcon(waterMask);
      Image waterImg = waterIcon.getImage();
      int waterWidth = waterImg.getWidth(null);
      int waterHeight = waterImg.getHeight(null);

      g.drawImage(waterImg, width-waterWidth, height-waterHeight, waterWidth, waterHeight, null);

      g.dispose();


      //生成输出的图片的文件
      try {
          FileOutputStream out = new FileOutputStream(newPicturePath);
          JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
          JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
          param.setQuality(1, true);
          encoder.encode(bimage, param);
          out.close();
      }
      catch (Exception e) {
       e.printStackTrace();
      }
}

//测试

public static void main(String[] args){
WaterMask("d:/1.jpg","d:/风光1.jpg","d:/water.jpg");
}

}

注：本文转自 http://blog.csdn.net/liusong721/archive/2009/08/13/4442649.aspx