Cannot change version of project facet Dynamic Web Module to 3.0.

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使用maven的组建spring + spring mvc + spring security时，出现这个异常，并且伴随另一个错误，大意是：很多示例没有实例化

并且，程序可以运行，运行提示的是contextConfigLocation找不到类

网上找了很多文章，最方便的是：

在工程目录下有一个.settings文件夹,打开org.eclipse.wst.common.project.facet.core.xml做如下修改:
<installed facet="jst.web" version="2.5"/>

将version改成需要的编号即可

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Maven web项目报异常：Cannot change version of project facet Dynamic Web Module to 3.0.
异常——（4）Cannot change version of project facet Dynamic Web Module to 3.0
cannot change version of project facet dynamic web module to 3.0异常修复
Eclipse EE Cannot change version of project facet Dynamic web module to 3.0
解决Cannot change version of project facet Dynamic web module to 3.0
Maven下解决Cannot change version of project facet Dynamic Web module to 3.0
ERROR: Cannot change version of project facet Dynamic Web Module to 3.0?
解决Cannot change version of project facet Dynamic web module to 3.0
Cannot change version of project facet Dynamic Web Module to 3.0
Cannot change version of project facet Dynamic Web Module to 3.0.
Cannot change version of project facet Dynamic web module to 3.0 解决方案
错误Cannot change version of project facet Dynamic Web Module to 3.0
Cannot change version of project facet Dynamic Web Module to 3.0?
Cannot change version of project facet Dynamic Web Module to 3.0.
解决Cannot change version of project facet Dynamic web module to 3.0
Cannot change version of project facet Dynamic Web Module to 2.5.或者3.0
Cannot change version of project facet Dynamic Web Module to 2.5(3.0)
解决Cannot change version of project facet Dynamic web module to 3.0
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Cannot change version of project facet Dynamic Web Module to 3.0.
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