struts2.1.x 升级到struts2.3.x

由于 struts2 2.1.8.1 的版本存在漏洞，需要升级到2.3.14.3

升级所需修改的包删除

struts2-convention-plugin-2.1.x.1.jar

struts2-core-2.1.x.1.jar

struts2-embeddedjsp-plugin-2.1.x.1.jar

struts2-json-plugin-2.1.x.1.jar

struts2-spring-plugin-2.1.x.1.jar

xwork-core-2.1.8.jar

ognl-2.7.3.jar

添加

commons-lang3-3.1.jar

javassist-3.11.0.GA.jar

ognl-3.0.6.jar

struts2-convention-plugin-2.3.14.3.jar

struts2-core-2.3.14.3.jar

struts2-embeddedjsp-plugin-2.3.14.3.jar

struts2-json-plugin-2.3.14.3.jar

struts2-spring-plugin-2.3.14.3.jar

xwork-core-2.3.14.3.jar

若将asm.jar改为asm-3.3.jar 

需添加asm-tree-3.3.jar

asm-commons-3.3.jar

同时修改cglib-2.1.3为cglib-2.2

同时将：

<filter-class>org.apache.struts2.dispatcher.FilterDispatcher  

</filter-class> 

修改为

<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter  

</filter-class>