I have the below sample code which generates a PDF file using iText.
The question I have is when I create the base64Binary by DatatypeConverter.printBase64Binary method.. I tried to copy the Sysem.out.println of "base64Binary". Used a online base64 online decoder tool to decode the content and save it output as sample.pdf and when I try to open the sample.pdf it shows empty. I am not sure why its behaving this way and help would be much appreciated. But when I directly decode using java and write it to a disk file it shows the context.
Can someone help me understand why it shows blank when I try to save "base64Binary" output as sample.pdf.
Thanks.
Below is the code snippet:
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.xml.bind.DatatypeConverter;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Font.FontFamily;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfWriter;
/**
* Creates a PDF file in memory.
*/
public class HelloWorldMemory {
/** Path to the resulting PDF file. */
public static final String RESULT = "C:////hello_memory.pdf";
public static void main(final String[] args) throws DocumentException, IOException {
// step 1
final Document document = new Document();
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final PdfWriter writer = PdfWriter.getInstance(document, baos);
document.open();
final PdfContentByte cb = writer.getDirectContent();
cb.beginText();
cb.setFontAndSize(getBaseFont(Font.NORMAL), 24);
final float exPosition = (PageSize.A4.getWidth()) / 2;
cb.showTextAligned(Element.ALIGN_CENTER, "Test No", exPosition, 670, 0);
cb.endText();
document.add(new Paragraph("Hello World!"));
document.close();
System.out.println("baos.toByteArray():" + baos.toByteArray());
final String base64Binary = DatatypeConverter.printBase64Binary(baos.toByteArray());
System.out.println("base64Binary:" + base64Binary);
final byte[] txt = DatatypeConverter.parseBase64Binary(base64Binary);
final FileOutputStream fos = new FileOutputStream(RESULT);
fos.write(txt);
fos.close();
}
private static BaseFont getBaseFont(final int fontType) {
final Font f = new Font(FontFamily.HELVETICA, 0, fontType);
final BaseFont baseFont = f.getCalculatedBaseFont(true);
return baseFont;
}
}
