Eclipse warn: Implementation of project facet maven could not be found. Functionality will be limit

警告：

Implementation of project facet maven could not be found. Functionality will be limited.

Implementation of project facet me.hibernate could not be found. Functionality will be limited.

Implementation of project facet me.spring could not be found. Functionality will be limited.

PROJECT_DIR/.settings/org.eclipse.wst.common.project.facet.core.xml

<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
  <fixed facet="wst.jsdt.web"/>
  <installed facet="java" version="1.7"/>
  <installed facet="jst.web" version="2.4"/>
  <installed facet="wst.jsdt.web" version="1.0"/>
  <installed facet="me.hibernate" version="4.1"/>
  <installed facet="me.spring" version="3.1"/>
  <installed facet="maven" version="1.0"/>
</faceted-project>

解決方案：

將文件org.eclipse.wst.common.project.facet.core.xml中的下面三行去掉。

  <installed facet="me.hibernate" version="4.1"/>
  <installed facet="me.spring" version="3.1"/>
  <installed facet="maven" version="1.0"/>