I have to build a Java servlet that receives an image and returns that image converted to PNG format. How can I achieve this? By converting I don't mean changing the file extension, like some examples suggest.
Thanks in advance!
Try this out:
package demo;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.IOException;
public class Main {
public static void main( String [] args ) throws IOException {
File input = new File("input.gif");
File output = new File("output.png");
ImageIO.write( ImageIO.read( input ), "png", ouput);
}
}
Read ImageIO .
Of course, you may want to read and write from an stream instead.
ImageIO.write(ImageIO.read(new File("img.gif")), "png", new File("img.png"));
使用ImageIo以您想要的任何格式保存图像。
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