jst.web的version改为3.1

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

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <faceted-project>
   <fixed facet="wst.jsdt.web"/>
-  <installed facet="jst.web" version="2.3"/>
+  <installed facet="jst.web" version="3.1"/>
   <installed facet="wst.jsdt.web" version="1.0"/>
   <installed facet="java" version="1.7"/>
+  <installed facet="jst.jaxrs" version="1.1"/>
 </faceted-project>