JAVA+Struts2获取服务器地址的方法

HttpServletRequest request=ServletActionContext.getRequest(); 
String path=request.getRequestURI(); 
String actionPath=".."+path.substring(9); 
//访问服务器所带有的参数信息 
String queryInfo=request.getQueryString(); 
if(queryInfo!=null&&(!queryInfo.equals(""))){ 
  actionPath=actionPath+"?"+queryInfo; 
} 
logger.debug("用户访问的路径是:"+actionPath); 
ActionContext.getContext().getSession().put(GlobalField.PRE_PATH, actionPath);