I got a email with the following requirement,
I came across your post while searching for a solution to add barcode to my invoices.
I can print the invoices as a pdf file but the problem is to have my tracking number printed as a barcode.
Can you do some software customization so it can read a certain area of the pdf file, convert and insert a barcode for printing ? I usually print about 50 invoices at a time.
After many exchanges, I finally decided to use pdftohml to parser pdf and get the text with the give position, use itext to insert barcode In order to be convenient for the customer, I use gcj to compile it to native code, so it can be run without jvm.
And my customer has used this application over 3 years.