https://www.cnblogs.com/longronglang/p/7156383.html(copy)
help->install new software
web - http://download.eclipse.org/releases/luna
Kepler - http://download.eclipse.org/releases/kepler
eclipse没有(添加)”Dynamic Web Project”选项的方法
原文：https://www.cnblogs.com/dianzan/p/9784802.html