request.getHeader("Referer"); request中很多方法和属性，这个方法能够获取请求连接的来源页面ＵＲＬ。

request.getHeader("user-agent");这个方法能够获取到客户端的ＩＰ、系统、浏览器名称等等主要信息。

附上两个获取客户端ＩＰ及系统类型的方法：

private static String getRequestBrowserInfo(String header){
  String browserVersion = null;
  if(header == null || header.equals("")){
   return "";
  }
        if(header.indexOf("MSIE")>0){
            browserVersion = "IE";
        }else if(header.indexOf("Firefox")>0){
            browserVersion = "Firefox";
        }else if(header.indexOf("Chrome")>0){
            browserVersion = "Chrome";
        }else if(header.indexOf("Safari")>0){
            browserVersion = "Safari";
        }else if(header.indexOf("Camino")>0){
            browserVersion = "Camino";
        }else if(header.indexOf("Konqueror")>0){
            browserVersion = "Konqueror";
        }
        log.info("用户的浏览器是：" + browserVersion);
        return browserVersion;
 }

 private static String getRequestSystemInfo(String header){
  String systenInfo = null;
  if(header == null || header.equals("")){
   return "";
  }
        //得到用户的操作系统
        if (header.indexOf("NT 6.0") > 0){
            systenInfo = "Windows Vista/Server 2008";
        } else if (header.indexOf("NT 5.2") > 0){
            systenInfo = "Windows Server 2003";
        } else if (header.indexOf("NT 5.1") > 0){
            systenInfo = "Windows XP";
        } else if (header.indexOf("NT 6.0") > 0){
            systenInfo = "Windows Vista";
        } else if (header.indexOf("NT 6.1") > 0){
            systenInfo = "Windows 7";
        } else if (header.indexOf("NT 6.2") > 0){
            systenInfo = "Windows Slate";
        } else if (header.indexOf("NT 6.3") > 0){
            systenInfo = "Windows 9";
        } else if (header.indexOf("NT 5") > 0){
            systenInfo = "Windows 2000";
        } else if (header.indexOf("NT 4") > 0){
            systenInfo = "Windows NT4";
        } else if (header.indexOf("Me") > 0){
            systenInfo = "Windows Me";
        } else if (header.indexOf("98") > 0){
            systenInfo = "Windows 98";
        } else if (header.indexOf("95") > 0){
            systenInfo = "Windows 95";
        } else if (header.indexOf("Mac") > 0){
            systenInfo = "Mac";
        } else if (header.indexOf("Unix") > 0){
            systenInfo = "UNIX";
        } else if (header.indexOf("Linux") > 0){
            systenInfo = "Linux";
        } else if (header.indexOf("SunOS") > 0){
            systenInfo = "SunOS";
        }
        log.info("用户的操作系统是:" + systenInfo);
        return systenInfo;
 }