java - Cannot change version of project facet Dynamic Web Module to 3.0? -


i using maven create dynamic webapp in eclipse. added folders src/test/java , src/test/resources. changed library in java build path obtain javase-1.7. it's ok here.

when tried change projects facet dynamic web module went wrong. had change java 1.7 in same place. , still told me, cannot change version of project facet dynamic web module 3.0.

i have changed effect changing think.

i updated web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"          xsi:schemalocation="http://java.sun.com/xml/ns/javaee            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"     version="3.0">     <display-name>servlet 3.0 web application</display-name> </web-app>

and maven -> update project ...


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