本文介绍如何将Maven Java EE项目从默认的Java版本升级到Java 1.7，包括更改项目构建路径中的Java库版本、调整Eclipse的编译合规级别、更新项目特性以及添加动态Web模块等步骤。
- Go to project Build Path and change the Java Library version to 1.7
Go to Eclipse Preferences -> Java -> Compilre -> Change compliance level to 1.7
Right click on project -> Properties -> Project Facets
- Uncheck Dynamic Web Module and click Apply (also uncheck JavaServer Faces if you had that)
- Change the Java facet version to 1.7 and click Apply
- Add the Dyanmic Web Module v3.0, apply.
Eclipse’s facets configuration is buggy. Make sure you keep hitting Apply between checking and unchecking of facets.
Links:
Cannot change version of project facet Dynamic Web Module to 3.0?
Change version of project facet Dynamic Web Module to 2.5
转自：http://stackoverflow.com/questions/23183931/maven-java-ee-configuration/23184418#23184418
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