struts2 2.3.1.1启动异常原因

Exception starting filter struts2 java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils2011-10-19 21:12

?Exception starting filter struts2 java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils

myeclipse开发中出现严重：Exception starting filter struts2 java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils

上述tomcat启动时加载错误

除了基础的5个包外还缺少这几个commons-io.jar commons-lang,jar javassist-3.7.ga.jar包

项目常用包有 commons-fileupload-1.2.2 commons-logging-1.1.1? freemarker-2.3.18 ognl-3.0.3 xwork-core-2.3.1.1

?? struts2-core-2.3.1.1