Tomcat 加载时会出现如下异常:

java.lang.SecurityException: class "org.apache.commons.collections.FastHashMap"'s signer information does not match signer information of other classes in the same package
 at java.lang.ClassLoader.checkCerts(Unknown Source)
 at java.lang.ClassLoader.preDefineClass(Unknown Source)
 at java.lang.ClassLoader.defineClass(Unknown Source)
 at java.security.SecureClassLoader.defineClass(Unknown Source)
 at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1817)
 at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
 at java.lang.ClassLoader.loadClassInternal(Unknown Source)
 at org.apache.struts.action.ActionServlet.<init>(ActionServlet.java:205)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
 at java.lang.reflect.Constructor.newInstance(Unknown Source)
 at java.lang.Class.newInstance0(Unknown Source)
 at java.lang.Class.newInstance(Unknown Source)
 at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1104)
 at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
 at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4042)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4348)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
 at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
 at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
 at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
 at org.apache.catalina.core.StandardService.start(StandardService.java:516)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
2007-9-6 11:59:47 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2007-9-6 11:59:48 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2007-9-6 11:59:48 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47  config=null
2007-9-6 11:59:48 org.apache.catalina.startup.Catalina start
信息: Server startup in 11735 ms

遭遇安全侵犯时由安全管理器抛出的异常!  数据类型的问题!!
数据类型问题检查一下hibernat 映射文件,写的类里的属性类型,表里的字段类型