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Loading a Base64 encoded image string into JLabel

I got a converter working here

public class ImageProcessor {
    public static void Base64TImage (String base64) {
        try {            
            byte [] btDataFile = new sun.misc.BASE64Decoder (). decodeBuffer (base64);
            File of = new File ("yourFile.png");
            FileOutputStream osf = new FileOutputStream (of);
            osf.write (btDataFile);
            osf.flush ();
        } catch (IOException ex) {
            Logger.getLogger (ImageProcessor.class.getName ()). Log (Level.SEVERE, null, ex);
        }

    }
    public static void main (String args []) {
        String base64 = "iVBORw0KGgoAAAANSUhEUgAAAMcAAABqCAYAAAAIh0X2AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAEihJREFUeNrsXctvG8cZH9H0Q35ElOM4aWBYzKvoIa6YOMihKOD1vYDZHHsRBTRAewp96y30oUVvof + BZH3uIdSlPZbqpUAax1TTAmnqxKTi + FXFImW9qUdn6Blp + HF2d / Y9tL4PoGUud2dn5 / t + 32vm2xnZ3d0lSEhIg5Rl / 4yMjETW4O7yexP0T5F + LPrJ8b + Mmuyzs7XV7D5eanTbTxr0e + PU2zc7yAYkE2mEWY4owEFBcYn + qUhgcKWd7hbZ / KFNtpZWGGhq9FOlQGkhS5CeGXBQUEwywdYFBaTt9U2y8XCB7Gx02dc6 / ZQQJEhDDw4KjA84MMJZne0dsv5ggWyvrLGvbfopU4DcQPYgDR04KCjGOChKUXaGAYS6WeKrTQEyjSxCGhpwcGAw96cQR4dWW / eEi4UAQRoecMQNDOFirdy5SyP2vRQzc7GuI6uQUgHHO ++ 8o3Xy57MTn5KnadpYaXt1nazdfSgfsqz3ySyyC8lIy0GtxkdMiyfVsbXvH4kAnVGTWSucE0FKkjKa7tSVJIHB6OjZ0 / LXfNL3R0LytBw8zmCaO5d050D2iqV482g9kEyyHHYawGB05Pm + 2 + bQeiAZYzn4kpB6mh0Eqd02tRzjyDYkEyxHNe0OHs4912c9nnxx8QqyDSlVcFCrMUVinM / QpUPHj8FDJWQbUtqWo2JEBw9nSeboYfmQhWxDSg0cPNbIm9LJQ6PHoGt1CVmHlJblMCorpHCt0HogJQ8OqZLPnE4ePYLgQDLCchSN6 + ThLDxUQNYhpQGOkpEd7Q / 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AAMAAP61LDVrLLgAAAAASUVORK5CYII = ";            
        Base64TImage (base64);
    }
}

This converter creates a file and places it in the current working directory. But I do not want to create a file, I want this image to go directly to JLabel. Is it possible?

+3
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2 answers

Here is an example based on your code:

byte[] btDataFile = new sun.misc.BASE64Decoder().decodeBuffer(base64);
BufferedImage image = ImageIO.read(new ByteArrayInputStream(btDataFile));
JOptionPane.showMessageDialog(null, "", "Image", 
        JOptionPane.INFORMATION_MESSAGE, 
        new ImageIcon(image));

I would recommend you to avoid using sun.misc.BASE64Decoder, like sun.* packages are not part of the supported, public interface, details here . You can easily switch to Base64 from Apache Commons, i.e.:

byte[] btDataFile = Base64.decodeBase64(base64);
BufferedImage image = ImageIO.read(new ByteArrayInputStream(btDataFile));
JOptionPane.showMessageDialog(null, "", "Image", 
        JOptionPane.INFORMATION_MESSAGE, 
        new ImageIcon(image));
+8
source

example from http://commons.apache.org/proper/commons-codec/

    JLabel jLabelImagen = new JLabel(); 
    byte[] imageByte = org.apache.commons.codec.binary.Base64.decodeBase64(base64); 
    ByteArrayInputStream inputStream = new ByteArrayInputStream(imageByte);                         
    BufferedImage bufImage = ImageIO.read(inputStream);
    ImageIcon icon = new ImageIcon(bufImage);
    jLabelImagen.setIcon(icon);
0
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