java如何根据HttpServletRequest获取IP地址_Java

java根据httpservletrequest获取ip地址

解决办法：

以下整理了各个代理服务器自己开发的转发服务请求头，这些请求头都不是标准的http请求头，不一定所有的代理都会带上这些请求头，所以通过这方式只能尽可能的获取到真实ip，但不能保证一定可以获取到真实ip，而且代理服务器请求头中获取的ip是可伪造的。

参数：

x-forwarded-for：squid 服务代理
proxy-client-ip：apache 服务代理
wl-proxy-client-ip：weblogic 服务代理
http_client_ip：有些代理服务器
x-real-ip：nginx服务代理

方法一

public static string getipaddress(httpservletrequest request) {
    string ip = null;    //x-forwarded-for：squid 服务代理
    string ipaddresses = request.getheader("x-forwarded-for");
    if (ipaddresses == null || ipaddresses.length() == 0 || "unknown".equalsignorecase(ipaddresses)) {        //proxy-client-ip：apache 服务代理
        ipaddresses = request.getheader("proxy-client-ip");
    }
    if (ipaddresses == null || ipaddresses.length() == 0 || "unknown".equalsignorecase(ipaddresses)) {        //wl-proxy-client-ip：weblogic 服务代理
        ipaddresses = request.getheader("wl-proxy-client-ip");
    }
    if (ipaddresses == null || ipaddresses.length() == 0 || "unknown".equalsignorecase(ipaddresses)) {        //http_client_ip：有些代理服务器
        ipaddresses = request.getheader("http_client_ip");
    }
    if (ipaddresses == null || ipaddresses.length() == 0 || "unknown".equalsignorecase(ipaddresses)) {        //x-real-ip：nginx服务代理
        ipaddresses = request.getheader("x-real-ip");
    }    //有些网络通过多层代理，那么获取到的ip就会有多个，一般都是通过逗号（,）分割开来，并且第一个ip为客户端的真实ip
    if (ipaddresses != null && ipaddresses.length() != 0) {
        ip = ipaddresses.split(",")[0];
    }    //还是不能获取到，最后再通过request.getremoteaddr();获取
    if (ip == null || ip.length() == 0 || "unknown".equalsignorecase(ipaddresses)) {
        ip = request.getremoteaddr();
    }
    return ip;
}

方法二

public static string getipaddr(httpservletrequest request)
    {
        if (request == null)
        {
            return "unknown";
        }
        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("x-forwarded-for");
        }
        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("x-real-ip");
        }

        if (ip == null || ip.length() == 0 || "unknown".equalsignorecase(ip))
        {
            ip = request.getremoteaddr();
        }
        return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : escapeutil.clean(ip);
    }