Eclipse中配置struts2发布web项目报错：
需要检查如下：
- tomcat与jdk的版本问题。
- struts.xml文件在否在src目录下。
- struts.xml文件名大小写是否命名正确。
- jar包上是否重复（Tomcat的lib下加了jar包，项目的lib中又加入一遍jar包，造成冲突）。
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