Struts 2提供的插件是一个JAR文件，它以“Struts2-框架名-plugin-版本号.jar”方式命名，只需将该文件拷贝到Web应用的classpath下即可-Struts 2 is provided by the plug-in is a JAR file, it is Struts2- fr a mework name-plugin- version number.Jar naming, just copy the file to the Web application cla