需求:
当有二级域名或者通过前置机路由那么需要获取其访问的真实bathpath
实现:
protected String getBasePath(HttpServletRequest request) {
	StringBuffer url = request.getRequestURL();
	String basePath = url
			.delete(url.length() - request.getRequestURI().length(),
					url.length()).append("/").toString();
	return basePath;
}
?
原文:http://snv.iteye.com/blog/2217357