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How can i easily convert html to image and then to byte array without create it
thanks
387
Create a ByteArrayInputStream object by passing the byte array (that is to be converted) to its constructor. Read the image using the read() method of the ImageIO class (by passing the ByteArrayInputStream objects to it as a parameter). Finally, Write the image to using the write() method of the ImageIo class.
Create the object of the ByteArrayOutputStream class and write the image into that which we have read in the above step. ByteArrayOutputStream outStreamObj = new ByteArrayOutputStream(); ImageIO. write(image, "jpg", outStreamObj); Convert the image into the byte array.
Read the image using the read() method of the ImageIO class. Create a ByteArrayOutputStream object. Write the image to the ByteArrayOutputStream object created above using the write() method of the ImageIO class. Finally convert the contents of the ByteArrayOutputStream to a byte array using the toByteArray() method.
If you do not have any complex html you can render it using a normal JLabel. The code below will produce this image:
<html>
<h1>:)</h1>
Hello World!<br>
<img src="http://img0.gmodules.com/ig/images/igoogle_logo_sm.png">
</html>
public static void main(String... args) throws IOException {
String html = "<html>" +
"<h1>:)</h1>" +
"Hello World!<br>" +
"<img src=\"http://img0.gmodules.com/ig/images/igoogle_logo_sm.png\">" +
"</html>";
JLabel label = new JLabel(html);
label.setSize(200, 120);
BufferedImage image = new BufferedImage(
label.getWidth(), label.getHeight(),
BufferedImage.TYPE_INT_ARGB);
{
// paint the html to an image
Graphics g = image.getGraphics();
g.setColor(Color.BLACK);
label.paint(g);
g.dispose();
}
// get the byte array of the image (as jpeg)
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", baos);
byte[] bytes = baos.toByteArray();
....
}
If you would like to just write it to a file:
ImageIO.write(image, "png", new File("test.png"));
I think you can use the library
html2image-0.9.jar
you can download this library at this page: http://code.google.com/p/java-html2image/
39
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