ECP项目 启动tomcat报错?报错

@龙影 你好，想跟你请教个问题：错误信息：

SEVERE: Exception starting filter jfinal
java.lang.NoClassDefFoundError: de/odysseus/el/ExpressionFactoryImpl
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at org.snaker.engine.helper.ClassHelper.instantiate(ClassHelper.java:106)
    at org.snaker.engine.impl.SimpleContext.put(SimpleContext.java:105)
    at org.snaker.engine.core.ServiceContext.put(ServiceContext.java:95)
    at org.snaker.engine.cfg.Configuration.parser(Configuration.java:185)
    at org.snaker.engine.cfg.Configuration.parser(Configuration.java:127)
    at org.snaker.engine.cfg.Configuration.buildSnakerEngine(Configuration.java:97)
    at org.snaker.jfinal.plugin.SnakerPlugin.start(SnakerPlugin.java:65)
    at net.loyin.cfg.JFWebConfig.configPlugin(JFWebConfig.java:107)
    at com.jfinal.core.Config.configJFinal(Config.java:48)
    at com.jfinal.core.JFinal.init(JFinal.java:67)
    at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:64)
    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$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: de.odysseus.el.ExpressionFactoryImpl
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    ... 29 more

四月 23, 2015 9:11:54 下午 org.apache.catalina.core.StandardContext startInternal
SEVERE: Error filterStart
四月 23, 2015 9:11:54 下午 org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/ECP-OPEN] startup failed due to previous errors

请问这个怎么解决？