从https://code.csdn.net/zhangdaiscott/JEECG上下载的工程,导入到myeclipse,无法部署到tomcat,这是为什么?pom.xml报错:Cannot upgrade/downgrade to Dynamic Web Module 3.0 facet. It is incompatibile with already installed facets: Java 1.5. Please modify project configuration.,我使用maven工程导入的