Java开发常见错误
2017-09-23 11:54
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Java开发常见错误
本Markdown编辑器使用[StackEdit][6]修改而来,用它写博客,将会带来全新的体验哦:1.把commons-logging-1.0.4.jar的包放到Tomcat/lib目录下即可:
Caused by: java.lang.NoClassDefFoundError: Lorg/apache/commons/logging/Log; at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getDeclaredFields(Class.java:1916) 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.loadApplicationServletAnnotations(WebAnnotationSet.java:132) at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65) at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:336) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:786) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:307) 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:5213) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) ... 6 more Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.Log at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) ... 20 more
2.jar冲突
jar冲突,把正确的那个tomcat,拷贝过去,或把tomcat下的lib下的所有jar拷贝到对应位置!如果不是这里的jar冲突,还有可能是 两个机器上classpath下的jar 不一样 。但是可以肯定的是jar版本不一致,你可以把exception stack贴出来,是可以找到相应的class和jar的。
23-Sep-2017 11:44:39.928 WARNING [localhost-startStop-1] org.springframework.context.support.AbstractApplicationContext.refresh Exception encountered during context initialization - cancelling refresh attempt org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.AbstractMethodError at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:753) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:835) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1853) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.AbstractMethodError at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:278) at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:445) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:710) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726) at org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory(LocalSessionFactoryBuilder.java:372) at org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:454) at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:439) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ... 25 more
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