JSP通过IP获取用户（客户端）的地理位置信息

<%!
//获取客户端的IP
public String getRemoteIP(HttpServletRequest request) { 
    if (request.getHeader("x-forwarded-for") == null) { 
        return request.getRemoteAddr(); 
    } 
    return request.getHeader("x-forwarded-for"); 
}%> 

<%
　　String ip = getRemoteIP(request);

    URL url = new URL("http://ip.taobao.com/service/getIpInfo.php?ip=" + ip);//使用的IP库是淘宝IP库
    HttpURLConnection urlConn = (HttpURLConnection)url.openConnection();

    InputStream res = urlConn.getInputStream();
    Scanner scanner = new Scanner(res);
    String urlContent = "";

    while (scanner.hasNextLine()) {
        urlContent += (String)scanner.nextLine();
    }
    
    System.out.println(urlContent);
%>