Class EncoderUtil


  • public class EncoderUtil
    extends Object
    A collection of utility methods for encoding images and returning them as a byte[] or writing them directly to an OutputStream.
    • Constructor Detail

      • EncoderUtil

        public EncoderUtil()
    • Method Detail

      • encode

        public static byte[] encode​(BufferedImage image,
                                    String format)
                             throws IOException
        Encode the image in a specific format.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        Returns:
        The byte[] that is the encoded image.
        Throws:
        IOException - if there is an IO problem.
      • encode

        public static byte[] encode​(BufferedImage image,
                                    String format,
                                    boolean encodeAlpha)
                             throws IOException
        Encode the image in a specific format.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        encodeAlpha - Whether to encode alpha transparency (not supported by all ImageEncoders).
        Returns:
        The byte[] that is the encoded image.
        Throws:
        IOException - if there is an IO problem.
      • encode

        public static byte[] encode​(BufferedImage image,
                                    String format,
                                    float quality)
                             throws IOException
        Encode the image in a specific format.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        quality - The quality to use for the image encoding (not supported by all ImageEncoders).
        Returns:
        The byte[] that is the encoded image.
        Throws:
        IOException - if there is an IO problem.
      • encode

        public static byte[] encode​(BufferedImage image,
                                    String format,
                                    float quality,
                                    boolean encodeAlpha)
                             throws IOException
        Encode the image in a specific format.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        quality - The quality to use for the image encoding (not supported by all ImageEncoders).
        encodeAlpha - Whether to encode alpha transparency (not supported by all ImageEncoders).
        Returns:
        The byte[] that is the encoded image.
        Throws:
        IOException - if there is an IO problem.
      • writeBufferedImage

        public static void writeBufferedImage​(BufferedImage image,
                                              String format,
                                              OutputStream outputStream)
                                       throws IOException
        Encode the image in a specific format and write it to an OutputStream.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        outputStream - The OutputStream to write the encoded image to.
        Throws:
        IOException - if there is an IO problem.
      • writeBufferedImage

        public static void writeBufferedImage​(BufferedImage image,
                                              String format,
                                              OutputStream outputStream,
                                              float quality)
                                       throws IOException
        Encode the image in a specific format and write it to an OutputStream.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        outputStream - The OutputStream to write the encoded image to.
        quality - The quality to use for the image encoding (not supported by all ImageEncoders).
        Throws:
        IOException - if there is an IO problem.
      • writeBufferedImage

        public static void writeBufferedImage​(BufferedImage image,
                                              String format,
                                              OutputStream outputStream,
                                              boolean encodeAlpha)
                                       throws IOException
        Encode the image in a specific format and write it to an OutputStream.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        outputStream - The OutputStream to write the encoded image to.
        encodeAlpha - Whether to encode alpha transparency (not supported by all ImageEncoders).
        Throws:
        IOException - if there is an IO problem.
      • writeBufferedImage

        public static void writeBufferedImage​(BufferedImage image,
                                              String format,
                                              OutputStream outputStream,
                                              float quality,
                                              boolean encodeAlpha)
                                       throws IOException
        Encode the image in a specific format and write it to an OutputStream.
        Parameters:
        image - The image to be encoded.
        format - The ImageFormat to use.
        outputStream - The OutputStream to write the encoded image to.
        quality - The quality to use for the image encoding (not supported by all ImageEncoders).
        encodeAlpha - Whether to encode alpha transparency (not supported by all ImageEncoders).
        Throws:
        IOException - if there is an IO problem.