struts2升级到2.3.15.1版本

正确的升级方式如下

commons-lang3-3.1.jar （这个是新加）(并保留原来的commons-lang-2.4.jar或是2.6)

javassist-3.11.0.GA.jar(新加）

ognl-3.0.6.jar(替换)

struts2-core-2.3.15.1.jar(替换)

xwork-core-2.3.15.1.jar(替换)

其它的jar包不用变

struts2-core-2.1.8.jar                      =》   struts2-core-2.3.15.1.jar 

struts2-jasperreports-plugin-2.1.8.jar      =》   struts2-jasperreports-plugin-2.3.15.1.jar 

struts2-json-plugin-2.1.8.jar               =》   struts2-json-plugin-2.3.15.1.jar 

struts2-spring-plugin-2.1.8.jar             =》   struts2-spring-plugin-2.3.15.1.jar 

struts2-tiles-plugin-2.1.8.jar              =》   struts2-tiles-plugin-2.3.15.1.jar 

velocity-1.5.jar                            =》   velocity-1.6.4.jar 

xwork-core-2.1.6.jar                        =》   xwork-core-2.3.15.1.jar 

commons-beanutils-1.7.0.jar                 =》   commons-beanutils-1.8.0.jar 

commons-digester-1.8.jar                    =》   commons-digester-2.0.jar 

commons-fileupload-1.2.1.jar                =》   commons-fileupload-1.3.jar 

commons-io-1.4.jar                          =》   commons-io-2.0.1.jar 

commons-logging-1.0.4.jar                   =》   commons-logging-1.1.3.jar 

freemarker.jar                              =》   freemarker-2.3.19.jar 

google-collect-1.0.jar                      =》   google-collections-1.0.jar 

ognl-2.6.9.jar                              =》   ognl-3.0.6.jar 

(追加)                                      =》   commons-lang3-3.1.jar *包依赖（xwork->lang3等） 

(追加)                                      =》   javassist-3.11.0.GA.jar *包依赖（struts2-core->ognl->javassit） (追加)                                      =》   struts2-jfreechart-plugin-2.3.15.1 (与struts2整合)

★ web.xml 修改
去除 ActionContextCleanUp 过滤器。被org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter替代。

org.apache.struts2.dispatcherClass FilterDispatcherDeprecated. Since Struts 2.1.3, use StrutsPrepareAndExecuteFilter instead or StrutsPrepareFilter and StrutsExecuteFilter if needing using the ActionContextCleanUp filter in addition to this oneorg.apache.struts2.dispatcher Class ActionContextCleanUpDeprecated. Since Struts 2.1.3, use StrutsPrepareFilter and StrutsExecuteFilter to use other Servlet filters that need access to the ActionContext

ActionContextCleanUp也是自2.1.3开始由StrutsPrepareFilter和StrutsExecuteFilter的组合替代。
StrutsPrepareAndExecuteFilter是StrutsPrepareFilter和StrutsExecuteFilter的组合