error with NULL character

[maul attu]

Hi everybody!
I'm storing into an INNODB table some files (matlab, excel) in a field of type LONGBLOB.
I read these files and with excel files, when i write the query (insert into propulsion values('...');) with a java program, an error occours:

java.sql.SQLException: Syntax error or access violation message from server: "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ࡱá' at line 1"

This exception in thrown when the first NULL (\0x00) character is read.
How can I solve this problem?

thanks in advance!