java web很常用的功能代码，可以配合实现IP白名单控制，直接贴代码：

复制代码 代码如下:

import javax.servlet.http.HttpServletRequest;

public class ClientInfoUtil{

/**

* 获得客户端的IP地址

* @param request

* @return

*/

static public String getIP(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.getRemoteAddr();

}

return ip;

}

/**

* 获得客户端访问服务器的url地址

* @param request

* @return

*/

static public String getURL(HttpServletRequest request) {

String url = request.getScheme()+"://";

url+=request.getHeader("host");

url+=request.getRequestURI();

if(request.getQueryString()!=null) {

url+="?"+request.getQueryString();

}

return url;

}

}