java 获取域名

ActionContext ctx = ActionContext.getContext();      

        HttpServletRequestrequest = (HttpServletRequest)ctx.get(ServletActionContext.HTTP_REQUEST);      

        HttpServletResponseresponse = (HttpServletResponse)ctx.get(ServletActionContext.HTTP_RESPONSE);    

 
        //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=http://localhost/kbs_new/flow/saveInfo.action?null
        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();
        int port =request.getServerPort();
        String name= request.getContextPath();
       
        // 协议名：//域名=http://localhost
        System.out.println("协议名：//域名="+url2);
       
        //request.getRequestURI();
        ///kbs_new/flow/saveInfo.action
       
        String uri =request.getRequestURI();
        //http://localhost:8088//kbs_new
        System.out.println(url2+":"+port+"/"+name+"\n"+uri);
       
       
        //获取项目名=/kbs_new
        System.out.println("获取项目名="+request.getContextPath());
       
       
        // 获取参数=null
        System.out.println("获取参数="+request.getQueryString());
        // 获取全路径=http://localhost:8088/kbs_new/flow/saveInfo.action
        System.out.println("获取全路径="+request.getRequestURL());