struts2笔记

1.获取项目根路径：

HttpServletRequest request = ServletActionContext.getRequest();
//获取物理根路径
String basePath = request.getSession().getServletContext().getRealPath("/");
//获取网络根路径
String baseUrl = request.getScheme()+":"+request.getServerName()+":"+request.getServerPort()+request.getContextPath();
//获取web相对路径
String rootPath = request.getContextPath();