have different Class objects for the type javax/el/ExpressionFactory used in the signature
使用Tomcat發布時,需將jurl.jar,jurl-engine.jar,jurl-impl.jar替換Tomcat安裝目錄lib下的el-api.jar
并且項目中不能有這3個包。
Or you can still use Tomcat 6.0, but you must replace el-api.jar with juel.jar. And don't forget to remove juel.jar from your app lib(A duplicate import, ...