获取tomcat路径
String savePath3 = System.getProperty("catalina.home");
E:\apache-tomcat-7.0.63
获取工程路径
String savePath = request.getSession().getServletContext().getRealPath("/");
E:\apache-tomcat-7.0.63\webapps\cloud-tool\
原文：http://www.cnblogs.com/zrui-xyu/p/5192356.html