JPEG Converter
The JDeli Java image conversion library is able to open and export images as JPEG files, giving a complete bulk JPEG converter between JPEG file format and lots of other image file formats.
JDeli can do this in ONE step with the convert method or separately open and export the JPEG image.
Batch Convert images to JPEG from Command Line or other language
java -jar jdeli.jar --convert jpg "inputFileOrDir" "outputDir"
Convert into JPEG or from a JPEG image file in Java
JDeli.convert(File inFile, File outFile);
JDeli.convert(InputStream inFile, OutputStream outfile, String format);
byte[] outputData=JDeli.convert(byte[] inputData, String format);
An additional set of methods allow values to be passed in which can give more control over conversion, depending on the image formats being converted (ie different image compression options).