struts2异常
由于使用WTP插件，tomcat部署跟myEclipse不太一样，使struts2碰到个问题：
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ERROR [Dispatcher] Dispatcher initialization failed
Unable to load configuration. - bean - jar:file:.../WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
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Caused by: Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:.../WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
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Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - jar:file:/D:/apache-tomcat-6.0.20/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72 - bean - jar:file:.../WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
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看错误第三条，很明显是重复加载了struts2-core.jar文件，这里粗心大意了，之前某项目的jar包配置到了tomcat的lib下面，所以新部署的项目先加载tomcat的lib，然后加载项目/WEB-INF/lib目录，造成重复加载。
