在启动tomcat时，报错：
五月 04, 2017 10:56:15 上午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-nio-8110"]
五月 04, 2017 10:56:15 上午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-apr-8011"]
五月 04, 2017 10:56:15 上午 org.apache.catalina.startup.Catalina start
信息: Server startup in 75562 ms
五月 04, 2017 10:56:15 上午 org.apache.catalina.core.StandardServer await
严重: StandardServer.await: create[localhost:8012]:
java.net.BindException: Address already in use: JVM_Bind
at java.net.DualStackPlainSocketImpl.bind0(Native Method)
at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
at java.net.ServerSocket.bind(ServerSocket.java:376)
at java.net.ServerSocket.<init>(ServerSocket.java:237)
at org.apache.catalina.core.StandardServer.await(StandardServer.java:427)
at org.apache.catalina.startup.Catalina.await(Catalina.java:779)
at org.apache.catalina.startup.Catalina.start(Catalina.java:725)
at 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:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
五月 04, 2017 10:56:15 上午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["http-nio-8110"]
五月 04, 2017 10:56:15 上午 org.apache.coyote.AbstractProtocol pause
信息: Pausing ProtocolHandler ["ajp-apr-8011"]
五月 04, 2017 10:56:15 上午 org.apache.catalina.core.StandardService stopInternal
信息: Stopping service Catalina
五月 04, 2017 10:56:16 上午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/bvrfis_zc] registered the JDBC driver [oracle.jdbc.driver.OracleDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
五月 04, 2017 10:56:16 上午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/bvrfis_zc] registered the JDBC driver [com.microsoft.jdbc.sqlserver.SQLServerDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
五月 04, 2017 10:56:16 上午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/bvrfis_zc] appears to have started a thread named [FileWatchdog] but has failed to stop it. This is very likely to create a memory leak.
五月 04, 2017 10:56:16 上午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/bvrfis_zc] created a ThreadLocal with key of type [javax.faces.context.FacesContext$1] (value [javax.faces.context.FacesContext$1@22d21372]) and a value of type [com.sun.faces.config.InitFacesContext] (value [com.sun.faces.config.InitFacesContext@dfab33a]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
五月 04, 2017 10:56:16 上午 org.apache.coyote.AbstractProtocol stop
信息: Stopping ProtocolHandler ["http-nio-8110"]
五月 04, 2017 10:56:16 上午 org.apache.coyote.AbstractProtocol stop
信息: Stopping ProtocolHandler ["ajp-apr-8011"]
五月 04, 2017 10:56:16 上午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["http-nio-8110"]
五月 04, 2017 10:56:16 上午 org.apache.coyote.AbstractProtocol destroy
信息: Destroying ProtocolHandler ["ajp-apr-8011"]
错误原因：网络上存在其他的j解释，可以参考博客 http://blog.csdn.net/flyfish778/article/details/9164285。
我的错误是由于这个tomcat已经启动了。关闭后，可以正常启动。