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错误提示：
Could not open the editor: An unexpected exception was thrown.
java.lang.NullPointerException
at com.genuitec.eclipse.struts2.model.di.Struts2DIModeBuilder.createWebResourceNode(Struts2DIModeBuilder.java:209)
at com.genuitec.eclipse.struts2.model.di.Struts2DIModelBuilder2.crea ...
错误提示：
警告: Could not find action or result
There is no Action mapped for namespace [/] and action name [] associated with context path [/struts2_01_HelloWorld]. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
at org.apache.struts2.impl.Str ...