日志jar包冲突报错：Class path contains multiple SLF4J bindings

　　问题现象：tomcat启动卡死，报错日志如下：

十一月 07, 2017 8:35:45 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ms-notify/WEB-INF/lib/log4j-slf4j-impl-2.9.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ms-notify/WEB-INF/lib/slf4j-log4j12-1.7.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]

　　问题定位：从日志里看到两个日志jar包冲突了：log4j-slf4j-impl-2.9.1.jar和slf4j-log4j12-1.7.2.jar

　　解决问题：根据日志给出的本地tomcat路径，进入到lib下，删除其中一个，这里进入E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ms-notify/WEB-INF/lib，删除log4j-slf4j-impl-2.9.1.jar，重启即可。