用java读取图片的三种方式

参考网址：http://www.cnblogs.com/zxp_9527/archive/2009/03/20/1417504.html

        // Read from a file        File sourceimage = new File("source.gif");        image = ImageIO.read(sourceimage);        // Read from an input stream        InputStream is = new BufferedInputStream(           new FileInputStream("mid.jpg"));         image = ImageIO.read(is);        // Read from a URL        URL url = new URL("http://www.javaworld.com/images/012407-tipsbox.jpg");        image = ImageIO.read(url);