http://beans.tistory.com/37
http://neokido.tistory.com/entry/iBatis-%EC%82%AC%EC%9A%A9%EB%B0%A9%EB%B2%95-%EC%A0%95%EB%A6%AC
http://blog.naver.com/PostView.nhn?blogId=korn123&logNo=30149171393 <- 좀 심플