[Java Tutorial # 5] How to Convert MemoryStream Image to PDF

In my last tutorial, I shared the java code to convert an image to PDF file. In this tutorial I am going to share code for converting MemoryStream image to PDF. I am using Image class of Aspose.PDF for Java library for this task because it offers the capability to convert an image from various sources into PDF format. This may include an image from particular location over the hard-drive, an image from MemoryStream or image placed over some web location. ImageInfo class has a method named setMemoryData() which is used specify MemoryStream as image source. You can use the library you want or you can also try this code by using Aspose Trial version. I hope the code will help you in understanding how to convert MemoryStream image to PDF file.

Code:

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try {
 
    //Create pdf document
    Pdf pdf = new Pdf();

    //Add a section into the pdf document
    Section sec1 = pdf.getSections().add();

    byte[] fileArray = null;

    //=====================================================//
    //        Get the Image contents into Byte Array
    //=====================================================//

    try {
            fileArray = getBytesFromFile(new File("d:/pdftest/Aspose.jpg"));
        } catch (IOException e) {
            e.printStackTrace();
        }

    //Create an image object in the section
    aspose.pdf.Image img1 = new aspose.pdf.Image(sec1);

    //Add image object into the Paragraphs collection of the section
    sec1.getParagraphs().add(img1);
 
    // Set the Image file type
    img1.getImageInfo().setImageFileType(ImageFileType.Jpeg);

    // create a BinayFileStream Object to hold byte array
    BinaryFileStream bstream = new BinaryFileStream(fileArray);
    //Set the image object to use BinaySgtream object
    img1.getImageInfo().setImageStream(bstream);

    //Save the PDF file
    pdf.save("d:/pdftest/Image2PDF.pdf");

}catch(java.io.IOException ioe){
                                System.out.println(ioe.getMessage());
              }catch(Exception e){
                                System.out.println(e.getMessage());
              }
}


          //=====================================================//
            // Method Returns the contents of file in a byte array
            //=====================================================//

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

        InputStream is = new FileInputStream(file);

        // Get the size of the file
        long length = file.length();

        /*
        * Ensure that file is not loarger than Integer.MAX_VALUE;
        */

        if (length > Integer.MAX_VALUE) {
            System.out.println("File is too large to process");
            return null;
        }

        // 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());
        }

        is.close();
        return bytes;

            }

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