org.postgresql.util.PSQLExceptio

1\ http://blog.chinaunix.net/uid-354915-id-3499975.html

2\\http://sun.hongxu.blog.163.com/blog/static/88276192013811101119891/

3\\\ http://www.ajaxstu.com/PostgreSQLjishu/298278.html

4  http://blog.chinaunix.net/uid-26149100-id-3189230.html

5 http://www.linuxidc.com/Linux/2011-03/33210.htm

6http://www.cnblogs.com/terrysun/archive/2012/11/30/2796479.html