获取客户端IP地址

通过客户端发送请求到服务端，在服务端获取客户端IP，转入 request 头信息：

服务端获取：

package com.chinadatapay.util;

/**
* 获取客户端IP
* @author Cloud
*
*/

public class RemoteHostUtil {

public static String getRemoteHost(javax.servlet.http.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.equals("0:0:0:0:0:0:0:1")?"127.0.0.1":ip;//最后用三元表达式判断是否是本地IP；
}
}


通过JS获取： <script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
    <script type="text/javascript">
        document.write(returnCitySN["cip"]+','+returnCitySN["cname"]);
    </script>


更多使用Js脚本方式获取IP请查阅：
http://www.jb51.net/article/52484.htm