Three ways to convert TIF to JPG with JAI

The project requirements: Should convert TIF into JPG with JAVA, But seems only IMAGEIO can't support TIF.
So should use JAI, Java Advantage Image jars.

JAI api download page: http://download.java.net/media/jai/builds/release/1_1_3/

JAI API document page: http://download.oracle.com/docs/cd/E17802_01/products/products/java-media/jai/forDevelopers/jai-apidocs/index.html



Code as below:

package com.ebay.test1;

import java.awt.image.RenderedImage;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import javax.imageio.ImageIO;

import javax.media.jai.JAI;

import javax.media.jai.RenderedOp;

import org.junit.Test;

import com.sun.media.jai.codec.ImageCodec;

import com.sun.media.jai.codec.ImageDecoder;

import com.sun.media.jai.codec.ImageEncoder;

import com.sun.media.jai.codec.JPEGEncodeParam;

public class Snippet {

@Test

public void testTif2JPG2(){

try{

String filename =  "F:\\Downloads\\CCITT_2.TIF";

String jpegFileName = "F:\\Downloads\\CCITT_2.JPG";

RenderedOp source = JAI.create("fileload", filename);

FileOutputStream stream = null;

stream = new FileOutputStream(jpegFileName );

com.sun.media.jai.codec.JPEGEncodeParam JPEGparam = new

com.sun.media.jai.codec.JPEGEncodeParam();

ImageEncoder encoder =

ImageCodec.createImageEncoder("jpeg",stream,JPEGparam);

encoder.encode(source);

}catch(Exception e){

e.printStackTrace();

}

}

@Test

public void testTif2JPG3(){

try{

String filename =  "F:\\Downloads\\CCITT_2.TIF";

String jpegFileName = "F:\\Downloads\\CCITT_2.JPG";

FileOutputStream stream = null;

stream = new FileOutputStream(jpegFileName );

byte[] b = getBytesFromFile(new File(filename));

InputStream bais = new ByteArrayInputStream(b);

ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", bais, null);

            RenderedImage ri = decoder.decodeAsRenderedImage();

// RenderedOp source = JAI.create("TIFF", bais);

ByteArrayOutputStream baos = new ByteArrayOutputStream();

JPEGEncodeParam JPEGparam = new JPEGEncodeParam();

JPEGparam.setQuality(Float.MIN_VALUE);

ImageEncoder encoder = ImageCodec.createImageEncoder("jpeg",baos,JPEGparam);

encoder.encode(ri);

byte[] byteArray = baos.toByteArray();

FileOutputStream fos = new FileOutputStream(new File(jpegFileName));

fos.write(byteArray);

}catch(Exception e){

e.printStackTrace();

}

}

 @Test

public void testTif2JPG4(){

try{

String filename =  "F:\\Downloads\\CCITT_2.TIF";

String jpegFileName = "F:\\Downloads\\CCITT_2.JPG";

FileOutputStream stream = null;

stream = new FileOutputStream(jpegFileName );

byte[] b = getBytesFromFile(new File(filename));

InputStream bais = new ByteArrayInputStream(b);

            ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", bais, null);

            RenderedImage ri = decoder.decodeAsRenderedImage();

            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

            ImageIO.write(ri, "JPEG", outputStream);

            stream.write(outputStream.toByteArray());

}catch(Exception e){

e.printStackTrace();

}

}

// Returns the contents of the file in a byte array.

    public static byte[] getBytesFromFile(File file) throws IOException {

        InputStream is = new FileInputStream(file);

    

        // Get the size of the file

        long length = file.length();

    

        // You cannot create an array using a long type.

        // It needs to be an int type.

        // Before converting to an int type, check

        // to ensure that file is not larger than Integer.MAX_VALUE.

        if (length > Integer.MAX_VALUE) {

        throw new IllegalArgumentException("File is too big, can't support.");

        }

    

        // Create the byte array to hold the data

        byte[] bytes = new byte[(int)length];

    

        // Read in the bytes

        int offset = 0;

        int numRead = 0;

        while (offset < bytes.length

               && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {

            offset += numRead;

        }

    

        // Ensure all the bytes have been read in

        if (offset < bytes.length) {

            throw new IOException("Could not completely read file "+file.getName());

        }

    

        // Close the input stream and return bytes

        is.close();

        return bytes;

    }

}