12个构成Struts核心的包

struts2-core-2.3.1.2.jar，asm-commons-3.3.jar，commons-fileupload-1.2.2.jar，commons-io-2.0.1.jar，commons-lang-2.5.jar，freemarker-2.3.18.jar，javassist-3.11.0.GA.jar，ognl-3.0.4.jar，struts2-dojo-plugin-2.3.1.2.jar