图片加水印

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");
}

}