Java中使用HttpRequest获取用户真实IP地址端口

 import javax.servlet.http.HttpServletRequest;  

 /**
  * 自定义访问对象工具类
  *
  * 获取对象的IP地址等信息
  * @author X-rapido
  *
  */
 public class CusAccessObjectUtil {  

     /**
      * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
 *
      * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
      * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
      *
      * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
      * 192.168.1.100
      *
      * 用户真实IP为： 192.168.1.110
      *
      * @param request
      * @return
      */
     public static String getIpAddress(HttpServletRequest request) {
         String ip = request.getHeader("x-forwarded-for");
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getHeader("Proxy-Client-IP");
         }
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getHeader("WL-Proxy-Client-IP");
         }
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getHeader("HTTP_CLIENT_IP");
         }
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getHeader("HTTP_X_FORWARDED_FOR");
         }
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getRemoteAddr();
         }
         return ip;
     }  

 }  

/**

*获取端口

*/

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
    String uri = request.getRequestURI();//返回请求行中的资源名称
    String url = request.getRequestURL().toString();//获得客户端发送请求的完整url
    String ip = request.getRemoteAddr();//返回发出请求的IP地址
    String params = request.getQueryString();//返回请求行中的参数部分
    String host=request.getRemoteHost();//返回发出请求的客户机的主机名
    int port =request.getRemotePort();//返回发出请求的客户机的端口号。
    System.out.println(ip);
    System.out.println(url);
    System.out.println(uri);
    System.out.println(params);
    System.out.println(host);
    System.out.println(port);
 }