javaweb获取访问路径、域名、项目名、

HttpServletResponse response = ServletActionContext.getResponse();
HttpServletRequest request = ServletActionContext.getRequest();
String url = request.getScheme()+"://"+ request.getServerName()+request.getRequestURI()+"?"+request.getQueryString();
System.out.println("获取全路径（协议类型：//域名/项目名/命名空间/action名称?其他参数）url="+url);
String url2=request.getScheme()+"://"+ request.getServerName();//+request.getRequestURI();
System.out.println("协议名：//域名="+url2);

System.out.println("获取项目名="+request.getContextPath());
System.out.println("获取参数="+request.getQueryString());
System.out.println("获取全路径="+request.getRequestURL());
request.getSession().getServletContext().getRealPath("/");//获取web项目的路径
this.getClass().getResource("/").getPath()//获取类的当前目录