之前在运行一个网上下载的SSM（SpringMVC+Spring+Mybatis）论坛DEMO的时候然后就报了下面的错，搜索了很久也找不到原因，今天发现我以前一个整合好的SSM工程也打不开了，还是报同样的错误，我在想是不是Tomcat的配置被改变了还是啥，我重装Tomcat有用吗，或者说有其他的什么解决办法吗，求各位大神
七月 11, 2017 4:39:08 下午 org.apache.catalina.core.ContainerBase addChildInternal
严重: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
Caused by: org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 18
七月 11, 2017 4:39:08 下午 org.apache.tomcat.util.modeler.BaseModelMBean invoke
严重: Exception invoking method manageApp
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
[2017-07-11 04:39:08,888] Artifact SSMtest:war exploded: Error during artifact deployment. See server log for details.
七月 11, 2017 4:39:08 下午 org.apache.tomcat.util.modeler.BaseModelMBean invoke
严重: Exception invoking method createStandardContext
javax.management.RuntimeOperationsException: Exception invoking method manageApp
Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
