There are no resources that can be added or removed from the server. .

eclipse导入一个项目后，不能加载到tomcat里面，
出现“There are no resources that can be added or removed from the server.”

解决方法：
第1步、新建一个“Dynamic Web Project”

第2步、把新建项目里面的.project文件和.settings文件夹复制到导入的那个项目里面。