http://howtodoinjava.com/2013/06/04/solved-java-compiler-level-does-not-match-the-version-of-the-installed-java-project-facet/
mvn eclipse:eclipse -Dwtpversion=2.0
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http://howtodoinjava.com/2013/06/04/solved-java-compiler-level-does-not-match-the-version-of-the-installed-java-project-facet/
mvn eclipse:eclipse -Dwtpversion=2.0
转载于:https://my.oschina.net/macleo/blog/299060