Tomcat7+Spring3异常Failed to start component

我做的一个考试系统，使用了hibernate和spring，原来使用的tomcat版本是6，后来把tomcat换成了apache-tomcat-7.0.30-windows-x64，spring的版本是：3.1结果启动tomcat时报错如下：.6.Feb 27, 2013 12:18:00 AM org.apache.catalina.core.AprLifecycleListener initINFO: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].Feb 27, 2013 12:18:01 AM org.apache.catalina.core.AprLifecycleListener initializeSSLINFO: OpenSSL successfully initialized (OpenSSL 1.0.1c 10 May 2012)Feb 27, 2013 12:18:01 AM org.apache.coyote.AbstractProtocol initINFO: Initializing ProtocolHandler ["http-apr-8084"]Feb 27, 2013 12:18:01 AM org.apache.coyote.AbstractProtocol initINFO: Initializing ProtocolHandler ["ajp-apr-8009"]Feb 27, 2013 12:18:01 AM org.apache.catalina.startup.Catalina loadINFO: Initialization processed in 1026 msFeb 27, 2013 12:18:01 AM org.apache.catalina.core.StandardService startInternalINFO: Starting service CatalinaFeb 27, 2013 12:18:01 AM org.apache.catalina.core.StandardEngine startInternalINFO: Starting Servlet Engine: Apache Tomcat/7.0.30Feb 27, 2013 12:18:01 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\docsFeb 27, 2013 12:18:01 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\exam004Feb 27, 2013 12:18:01 AM org.apache.catalina.loader.WebappClassLoader validateJarFileINFO: validateJarFile(C:\kunlunsoft\exam2\tomcat\webapps\exam004\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.classFeb 27, 2013 12:18:08 AM org.apache.catalina.core.ContainerBase addChildInternal SEVERE: ContainerBase.addChild: start:org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/exam004]] 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:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)Caused by: java.lang.NullPointerException at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:142) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5274) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 11 moreFeb 27, 2013 12:18:08 AM org.apache.catalina.startup.HostConfig deployDirectorySEVERE: Error deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\exam004java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/exam004]] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:904) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)Feb 27, 2013 12:18:08 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\host-managerFeb 27, 2013 12:18:08 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\managerFeb 27, 2013 12:18:08 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory C:\kunlunsoft\exam2\tomcat\webapps\ROOTFeb 27, 2013 12:18:08 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["http-apr-8084"]Feb 27, 2013 12:18:08 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["ajp-apr-8009"]Feb 27, 2013 12:18:08 AM org.apache.catalina.startup.Catalina startINFO: Server startup in 7167 ms 解决办法：后来 在网上查了好长时间，看到了如下文章：http://hi.baidu.com/renyijiu/item/9dfda05328afe7464eff20b7把 spring 的版本更新为3.2.1.RELEASE ，问题就解决了。