Exception：Failed to start component [StandardEngine[Catalina... NoClassDefFoundError:org/apache/log4

来源：互联网发布：php 面向对象太烂编辑：程序博客网时间：2024/06/11 03:29

启动Tomcat组件失败

描述：org.apache.catalina.LifecycleException：Failed to start component[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ztsanma]]

….

Caused by:java.lang.NoClassDefFoundError:org/apache/log4j/Priority

org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ztsanma]]at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263)at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1975)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)at java.util.concurrent.FutureTask.run(FutureTask.java:262)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)at java.lang.Thread.run(Thread.java:744)Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Priorityat java.lang.Class.getDeclaredFields0(Native Method)at java.lang.Class.privateGetDeclaredFields(Class.java:2397)at java.lang.Class.getDeclaredFields(Class.java:1806)

问题解析：

Maven项目中所有依赖(jdk/jar/classes)关系都被其管理。所以如果确定项目中确实存在该包或文件(org/apache/log4j/Priority)，那必定是项目没有添加maven依赖所致。

解决方案：

右键报错项目-->属性 -->Deployment Assembly -->Add -->Java buid path entries -->Next -->MavenDependencies

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Get it!!!!!

0 0