IntelliJ idea running Web program error Listenerstart

18-sep-2016 17:04:03.023 SEVERE [localhost-startstop-1] Org.apache.catalina.core.StandardContext.startInternal Error Listenerstart 18-sep-2016 17:04:03.096 SEVERE [localhost-startstop-1] Org.apache.catalina.core.StandardContext.startInternal Context [/api] startup failed due to previous errors

The above problem is not clearly given where the error really appears.
The steps to resolve are as follows:
1, in the project directory web-info/classes a new logging.properties file, the file content is as follows:
Handlers = Org.apache.juli.filehandler,java.util.logging.consolehandler
Org.apache.juli.FileHandler.level = FINE
Org.apache.juli.FileHandler.directory = ${catalina.base}/logs
Org.apache.juli.FileHandler.prefix = Error-debug.

Java.util.logging.ConsoleHandler.level = FINE
Java.util.logging.ConsoleHandler.formatter = Java.util.logging.SimpleFormatter

2. Rebuild and run the Web project, and the log file beginning with Error-debug will be generated in the Logs folder under Tomcat.
3, the log file in the specific cause of error listenerstart errors, I this main reason is serious:
Error Configuring application Listener of Class Com.kindergartenmanagement.framework.listeners.MySessionListener
JVM 1 | Java.lang.ClassNotFoundException:com.kindergartenmanagement.framework.listeners.MySessionListener
JVM 1 | At Org.apache.catalina.loader.WebappClassLoaderBase.loadClass (webappclassloaderbase.java:1295)
JVM 1 | At Org.apache.catalina.loader.WebappClassLoaderBase.loadClass (webappclassloaderbase.java:1147)
JVM 1 | At Org.apache.catalina.core.DefaultInstanceManager.loadClass (defaultinstancemanager.java:520)
JVM 1 | At Org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged (defaultinstancemanager.java:501)
JVM 1 | At Org.apache.catalina.core.DefaultInstanceManager.newInstance (defaultinstancemanager.java:120)
JVM 1 | At Org.apache.catalina.core.StandardContext.listenerStart (standardcontext.java:4693)
JVM 1 | At Org.apache.catalina.core.StandardContext.startInternal (standardcontext.java:5196)
JVM 1 | At Org.apache.catalina.util.LifecycleBase.start (lifecyclebase.java:150)
JVM 1 | At Org.apache.catalina.core.ContainerBase Startchild.call (containerbase.java:1409) jvm1| Atorg.apache.catalina.core.ContainerBase Startchild.call (containerbase.java:1409) JVM 1 | At Org.apache.catalina.core.ContainerBaseStartChild.call (containerbase.java:1399)
JVM 1 | At Java.util.concurrent.FutureTask.run (Unknown Source)
JVM 1 | At Java.util.concurrent.ThreadPoolExecutor.runWorker (Unknown Source)
JVM 1 | At Java.util.concurrent.threadpoolexecutor$worker.run (Unknown Source)
JVM 1 | At Java.lang.Thread.run (Unknown Source)
The above error occurs because/web-info/ Classes can not find Com.kindergartenmanagement.framework.listeners.MySessionListener this class, and then delete the corresponding class, regenerate.