the selected server is enabled, but is not configured properly. deployment to it will not be permitted until the problem is corrected. please navigate to the server preference pages and verify the field with the prompt: tomcat 7.X jdk name
解決方法：
preferences -> Myeclipse -> server -> tomcat -> tomcat 7.X-> jdk 選擇你安裝的jdk，就可以了。
如圖：
2..
