"Problem solving" Project facet Java version 1.7 is not suppor

When you migrate an Eclipse project, you encounter

"Project facet Java version 1.7 is not supported."

the jdk1.7 in the project is not supported. Note that the project was compiled by other versions of the JDK and is not supported when running in Eclipse.
Workaround:
Method 1, select the project Properties, choose Project Facets, right-click Select Java, Change Version
Law 2, in the project directory there is a. Settings folder, under which there is a Org.eclipse.wst.common.project.facet.core.xml file with the following contents
<?xml version= "1.0" encoding= "UTF-8"?>
<faceted-project>
<fixed facet= "Jst.java"/>
<fixed facet= "Jst.web"/>
<installed facet= "Jst.web" version= "2.4"/>
<installed facet= "Jst.java" version= "6.0"/>
</faceted-project>
Modify <installed facet= "Jst.java" version= "6.0"/> to <installed facet= "Jst.java" version= "5.0"/>.


 

"Problem solving" Project facet Java version 1.7 is not suppor