JavaWeb 获取ip地址

 

JavaWeb 获取ip地址

CreateTime--2018年5月31日17点56分

Author:Marydon

import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.servlet.http.HttpServletRequest;

/**
 * 获取当前网络ip
 * @param request
 * @return
 */
public static String getIpAddr(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();
        if(ip.equals("127.0.0.1") || ip.equals("0:0:0:0:0:0:0:1")){
            //根据网卡取本机配置的IP
            InetAddress inet=null;
            try {
                inet = InetAddress.getLocalHost();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
            ip= inet.getHostAddress();
        }
    }
    //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
    if(ip!=null && ip.length()>15){ //"***.***.***.***".length() = 15
        if(ip.indexOf(",")>0){
            ip = ip.substring(0,ip.indexOf(","));
        }
    }
    return ip;
}

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