错误:Tomcat version 7.0 only supports J2EE 1.2, 1.3, 1.4, and Java EE 5 and 6 Web
在eclipse的workspace里面找到该项目。依次进入:.settings->org.eclipse.wst.common.project.facet.core.xml。打开文件后,将下面的版本改低一点。<installed facet="jst.web" version="3.1"/> 改成 <installed facet="jst.we...