Parse more than bind and execute when connect to database by jdbc

Hi hackers,
            I used jdbc to connect to PostgreSQL ,and I found parse 
nearly three            times of bind and execute.Is is normaly? What factors may 
cause this result?
            The OS is CentOS 5. The PG is 9.0.9. The JDBC is 9.2.
     Yours,     Wang Shuo     HighGo Software Co.,Ltd.     November 18, 2013