java 获取请求IP地址

1：获取ip地址

public static String getIpAddrhj(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 ("0:0:0:0:0:0:0:1".equals(ip)){
            ip = "127.0.0.1";
        }
        if (ip.split(",").length > 1){
            ip = ip.split(",")[0];
        }
        return ip;
    }

2: 获取主机名

    /**
     * 获取主机名
     * 
     * @return 本地主机名
     */
    public static String getHostName()
    {
        try
        {
            return InetAddress.getLocalHost().getHostName();
        }
        catch (UnknownHostException e)
        {
        }
        return "未知";
    }

3：获取ip地址

import javax.servlet.http.HttpServletRequest;

public class IPAddressUtil {
    public static String getIPAddress(HttpServletRequest request) {
        String ipAddress = request.getHeader("X-Forwarded-For");

        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
        }

        // 如果使用了代理服务器，可能会返回多个IP地址，其中第一个IP地址为真实IP地址
        if (ipAddress != null && ipAddress.contains(",")) {
            ipAddress = ipAddress.split(",")[0].trim();
        }

        return ipAddress;
    }
}