There was a problem with a project that was not published this week in development
Online Search to http://www.cnblogs.com/chanedi/articles/2112477.html this peer blog, a smooth solution to the problem, the method is posted here.
Through search, found in Project's. Setting folder below, there is a file called Org.eclipse.wst.common.project.facet.core.xml, which is configured with various version information. At this point, the problem is solved by modifying the file according to the native configuration.
<?xml version= "1.0" encoding= "UTF-8"?>
<faceted-project>
<runtime name= "Apache Tomcat v5.5"/>
<fixed facet= "Jst.web"/>
<fixed facet= "Jst.java"/>
<installed facet= "Jst.java" version= "5.0"/>
<installed facet= "Jst.web" version= "2.4"/>
<installed facet= "Wst.jsdt.web" version= "1.0"/>
</faceted-project>
》
For bugs like me, you can download Tomcat 7. 0 solve, but I am busy trouble, simply in the configuration file <installed facet= "Jst.web" version= "3.0"/> To lower version version= "2.5" just fine
Tomcat version 6.0 only supports EE 1.2, 1.3, 1.4, and Java EE 5 Web Modules