Eclipse安装插件长时间停留在calculating requirements and dependencies

http://blog.csdn.net/rui_dlut/article/details/6793865

把“Contact all update sites during install to find required software”（寻找指定的软件前先访问所有更新站点）前面的勾去掉，然后返回重新安装，这样之后问题迎刃而解