在启动tomcat时，出现以下错误：
严重: Exception sending context initialized event to listener instance of class org.shared.InitSharedListener
java.lang.Error: Unresolved compilation problem:
The method isEmpty() is undefined for the type String
at org.shared.InitSharedListener.contextInitialized(InitSharedListener.java:18)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
六月 08, 2015 10:07:00 上午 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.listener.QuartzListener
java.lang.Error: Unresolved compilation problem:
The method isEmpty() is undefined for the type String
at org.listener.QuartzListener.contextInitialized(QuartzListener.java:29)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
检查一下项目看看是否有错。或者试一试启动另外的成功项目看看是否还报同样的错误。
The method isEmpty() is undefined for the type String
方法没有定义，代码没有编译。
项目编译没有通过，还是先clean一下项目重新编译一下成功了再在tomcat里面发布吧。
用空对象的原故，就是没创建实例而你引用的就报这个异常．检查一下．
http://blog.163.com/stdio_01/blog/static/554685432008029236040/
The method isEmpty() is undefined for the type String：String类是没有isEmpty()方法的。你是不是搞错了，自己写了个Strings()工具类，然后写成String.isEmpty()?