eclipse中基于maven构建的web项目pom.xml中指定的jar包无法发布到tomcat中

eclipse运行maven web项目报错：

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信息: Starting Servlet Engine: Apache Tomcat/7.0.57 一月 07, 2015 11:50:44 下午 org.apache.catalina.core.ContainerBase startInternal 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/minisns]]     at java.util.concurrent.FutureTask.report(FutureTask.java:122)     at java.util.concurrent.FutureTask.get(FutureTask.java:188)     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)     at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)     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: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/minisns]]     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)     ... 6 more Caused by: java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext     at java.lang.Class.getDeclaredFields0(Native Method)     at java.lang.Class.privateGetDeclaredFields(Class.java:2397)     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:270)     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:139)     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)     at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:415)     at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:892)     at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)     at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5380)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     ... 6 more Caused by: java.lang.ClassNotFoundException: org.springframework.context.ApplicationContext     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)     ... 20 more 一月 07, 2015 11:50:44 下午 org.apache.catalina.core.ContainerBase startInternal 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]     at java.util.concurrent.FutureTask.report(FutureTask.java:122)     at java.util.concurrent.FutureTask.get(FutureTask.java:188)     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)     at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     at org.apache.catalina.startup.Catalina.start(Catalina.java:689)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:606)     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)     at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)     at java.util.concurrent.FutureTask.run(FutureTask.java:262)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)     at java.lang.Thread.run(Thread.java:744) Caused by: org.apache.catalina.LifecycleException: A child container failed during start     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)     at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)     ... 6 more

 原因是：tomcat对应项目的lib目录中没有pom.xml中指定的jar，但是有通过普通方法导入的jar包，解决方法如下：

1, 右键项目，选择 Properties ,然后选中 Deployment Assembly :

2. 点击 Add...

然后选中： Java Build Path Entries ，在点击 Next>

选中 Maven Dependencies ,然后 Finish , Ok 搞定。