Ho usato quello della Commons Logging, in esecuzione mi apre un frame ma non visualizzo nulla, mi segnala questi errori:
"gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream
gen 21, 2015 12:37:46 PM org.apache.pdfbox.filter.FlateFilter decode
GRAVE: Stop reading corrupt stream"