- 由于原来项目与本地项目的环境不一致问题，误将Maven Dependencies 删除，重新update项目后未将jar导入tomcat，部署报错：
Caused by: java.lang.NoClassDefFoundError: Lorg/apache/log4j/Logger; at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2436) at java.lang.Class.getDeclaredFields(Class.java:1806) at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106) at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:256) at org.apache.catalina.startup.WebAnnotationSet.loadApplicationFilterAnnotations(WebAnnotationSet.java:105) at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:64) at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:334) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:774) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:305) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5080) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 10 more Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) ... 24 more
解决方法如下：
- 右键项目，properties，Deployment Assembly:
- 发现没有Maven Dependencies项，点击Add，出现如下界：
- 点击Java Build Path Entris 会出现Maven Dependencies选项，添加进来即可。
- 再次运行项目，问题解决。
总结：Maven Dependencies里面包含整个项目所需的jar包，部署到容器中时，必须将这些包，放到WEB-INF/lib 目录下。
时间： 2024-10-06 17:56:29