java合并图片

private static BufferedImage merge() throws IOException {
int defaultHeight = 216;
//396+216
int defaultWidth = 612;

File logoFile = new File("D://tmp//logo.png");
File imageFile = new File("D://tmp//item.jpg");
//BufferedImage logoImages = ImageIO.read(logoFile);
//	BufferedImage itemImages = ImageIO.read(imageFile);

String logoUrl = "http://gtms01.alicdn.com/tps/i1/TB1fX__HXXXXXcWXXXXxb7H0VXX-396-216.jpg";
String itemUrl = "http://img04.taobaocdn.com/tfscom/i4/920815473/TB20usvcpXXXXXIXXXXXXXXXXXX_!!920815473.jpg";
BufferedImage logoImages = ImageIO.read(new URL(logoUrl));
BufferedImage itemImages = ImageIO.read(new URL(itemUrl));

Image img = Toolkit.getDefaultToolkit().getImage(new URL(itemUrl));
//		itemImages = toBufferedImage(img);
BufferedImage finalImg = new BufferedImage(defaultWidth, defaultHeight, BufferedImage.TYPE_INT_ARGB);
finalImg.createGraphics().drawImage(logoImages, 0, 0, null);

int itemHeight = itemImages.getHeight();
int itemWidth = itemImages.getWidth();
float maxHeight = 216;
float maxWidth = 216;
if (itemHeight > itemWidth) {
maxWidth = maxHeight / itemHeight * itemWidth;
} else {
maxHeight = maxWidth / itemWidth * itemHeight;
}
Image smallImage = itemImages.getScaledInstance((int) maxWidth, (int) maxHeight, Image.SCALE_AREA_AVERAGING);
finalImg.createGraphics().drawImage(smallImage, logoImages.getWidth(), 0, null);
//输出拼接后的图像
return finalImg;

}

public static BufferedImage toBufferedImage(Image image) {
if (image instanceof BufferedImage) {
return (BufferedImage) image;
}
// This code ensures that all the pixels in the image are loaded
image = new ImageIcon(image).getImage();

// Determine if the image has transparent pixels; for this method's
// implementation, see e661 Determining If an Image Has Transparent Pixels
//boolean hasAlpha = hasAlpha(image);

// Create a buffered image with a format that's compatible with the screen
BufferedImage bimage = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
try {
// Determine the type of transparency of the new buffered image
int transparency = Transparency.OPAQUE;
/*
* if (hasAlpha) { transparency = Transparency.BITMASK; }
*/

// Create the buffered image
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
} catch (HeadlessException e) {
// The system does not have a screen
}

if (bimage == null) {
// Create a buffered image using the default color model
int type = BufferedImage.TYPE_INT_RGB;
//int type = BufferedImage.TYPE_3BYTE_BGR;//by wang
/*
* if (hasAlpha) { type = BufferedImage.TYPE_INT_ARGB; }
*/
bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
}

// Copy image to buffered image
Graphics g = bimage.createGraphics();

// Paint the image onto the buffered image
g.drawImage(image, 0, 0, null);
g.dispose();

return bimage;
}

public static void main(String[] args)throws Exception{
BufferedImage bufferedImage=merge();
ImageIO.write(bufferedImage,"PNG",new FileOutputStream("d://zxl.png"));
}