dao

http://tutorials.jenkov.com/java-persistence/dao-design-problems.html
http://www.odi.ch/prog/design/newbies.php
http://www.kurumsaljava.com/yazilim-metotlari/tasarim-sablonlari/
http://www.kurumsaljava.com/yazilim-metotlari/yazilim-mimarisi/
http://www.cihataltuntas.com/data-access-object-pattern-dao/
http://www.kurumsaljava.com/2008/12/01/data-access-object-dao-tasarim-sablonu/
http://msdn.microsoft.com/tr-tr/library/et1kh6d3.aspx
http://yazilimcorbasi.blogspot.com.tr/2012/04/spring-ve-dao.html