참조: http://blog.springsource.com/2008/12/05/spring-framework-30-m1-released/
* revised project layout and build system with module-based sources
* updated entire codebase for Java 5 code style (generics, varargs)
* updated to JUnit 4.5 and JRuby 1.1
* introduced Spring EL parser (org.springframework.expression package)
* introduced support for #{…} expressions in