The server does not support version 3.0 of the J2EE Web module specification

Eclipse, Project->Run as->Run on Server

Tomcat 6.x 报错：The server does not support version 3.0 of the J2EE Web module specification

意思是其不支持3.0 版本的Servlet，Apache Tomcat对Servlet的支持版本对应如下：(http://tomcat.apache.org/whichversion.html)



项目根目录下，.settings子目录下org.eclipse.wst.common.project.facet.core.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
<installed facet="java" version="1.8"/>
<installed facet="jst.web" version="3.0"/>
<installed facet="wst.jsdt.web" version="1.0"/>
</faceted-project>

将version 3.0

<installed facet="jst.web" version="3.0"/>

修该成2.5，即可

<installed facet="jst.web" version="2.5"/>