問題描述

Exception in thread 'main' java.lang.NoClassDefFoundError: org/apache/log/format/Formatterat org.apache.velocity.runtime.log.LogManager.createLogSystem(LogManager.java:200)at org.apache.velocity.runtime.RuntimeInstance.initializeLogger(RuntimeInstance.java:591)at org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:264)at org.apache.velocity.app.VelocityEngine.init(VelocityEngine.java:118)at Test2.main(Test2.java:23)

問題解答

少avalon-logkit。建議用maven管理jar依賴。用denpendency tree，所有包之間的依賴關系一目了然。