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找到项目下org.eclipse.wst.common.project.facet.core.xml xml文件
<?xml version="1.0" encoding="UTF-8"?> <faceted-project> <fixed facet="wst.jsdt.web"/> <installed facet="jst.web" version="2.3"/> <installed facet="wst.jsdt.web" version="1.0"/> <installed facet="java" version="1.7"/> </faceted-project>
将jst.web,的version改成3.0.
然后在eclipse里右键该工程--maven--updateProject
Cannot change version of project facet Dynamic Web Module to 3.0.
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原文地址:http://www.cnblogs.com/damonfirstblog/p/5764577.html