java.lang.RuntimeException: java.lang.reflect.InvocationTargetException

<span style="font-size:24px;">项目启动报的异常，怎么回事啊？？？求赐教啊</span>

原来是少了 javassist-3.11.0.GA.jar 这个jar

java.lang.RuntimeException: java.lang.reflect.InvocationTargetExceptionat com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:301)at com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.construct(ContainerImpl.java:438)at com.opensymphony.xwork2.inject.ContainerBuilder$5.create(ContainerBuilder.java:207)at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:51)at com.opensymphony.xwork2.inject.ContainerBuilder$3.create(ContainerBuilder.java:93)at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:487)at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:484)at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:584)at com.opensymphony.xwork2.inject.ContainerBuilder.create(ContainerBuilder.java:484)at com.opensymphony.xwork2.config.impl.DefaultConfiguration.createBootstrapContainer(DefaultConfiguration.java:340)at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:229)at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445)at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:489)at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4809)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5485)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1229)at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1875)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)at java.util.concurrent.FutureTask.run(FutureTask.java:166)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)at java.lang.Thread.run(Thread.java:722)Caused by: java.lang.reflect.InvocationTargetExceptionat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:601)at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:299)... 32 moreCaused by: java.lang.ExceptionInInitializerErrorat com.opensymphony.xwork2.ognl.OgnlValueStackFactory.setContainer(OgnlValueStackFactory.java:84)... 37 moreCaused by: java.lang.IllegalArgumentException: Javassist library is missing in classpath! Please add missed dependency!at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:168)... 38 moreCaused by: java.lang.ClassNotFoundException: javassist.ClassPoolat org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)at java.lang.Class.forName0(Native Method)at java.lang.Class.forName(Class.java:188)at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:165)... 38 more四月 02, 2015 8:55:20 上午 org.apache.catalina.core.StandardContext filterStartSEVERE: Exception starting filter struts2java.lang.reflect.InvocationTargetException - Class: com.opensymphony.xwork2.inject.ContainerImpl$MethodInjectorFile: ContainerImpl.javaMethod: injectLine: 301 - com/opensymphony/xwork2/inject/ContainerImpl.java:301:-1at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:501)at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4809)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5485)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1229)at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1875)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)at java.util.concurrent.FutureTask.run(FutureTask.java:166)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)at java.lang.Thread.run(Thread.java:722)Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetExceptionat com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:301)at com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.construct(ContainerImpl.java:438)at com.opensymphony.xwork2.inject.ContainerBuilder$5.create(ContainerBuilder.java:207)at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:51)at com.opensymphony.xwork2.inject.ContainerBuilder$3.create(ContainerBuilder.java:93)at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:487)at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:484)at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:584)at com.opensymphony.xwork2.inject.ContainerBuilder.create(ContainerBuilder.java:484)at com.opensymphony.xwork2.config.impl.DefaultConfiguration.createBootstrapContainer(DefaultConfiguration.java:340)at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:229)at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445)at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:489)... 19 moreCaused by: java.lang.reflect.InvocationTargetExceptionat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:601)at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:299)... 32 moreCaused by: java.lang.ExceptionInInitializerErrorat com.opensymphony.xwork2.ognl.OgnlValueStackFactory.setContainer(OgnlValueStackFactory.java:84)... 37 moreCaused by: java.lang.IllegalArgumentException: Javassist library is missing in classpath! Please add missed dependency!at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:168)... 38 moreCaused by: java.lang.ClassNotFoundException: javassist.ClassPoolat org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)at java.lang.Class.forName0(Native Method)at java.lang.Class.forName(Class.java:188)at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:165)... 38 more