通过Request从用户请求中获取用户IP地址字符串

晓岩 发表于:2018-07-11 18:52 阅读: 194次

通过HttpServletRequest类对象,获取访问用户的IP地址

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import sun.net.util.IPAddressUtil;

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

/*******************************************************************************
 * author:岩涛 
 * -------------------------------------------------------------------------------
 * 本类的作用是: 从用户请求中获取用户IP地址字符串
 ******************************************************************************/
public class IpAddressUtil extends IPAddressUtil {


    private static Logger logger = LogManager.getLogger(IpAddressUtil.class);


    public static String getIpAddress(HttpServletRequest request) {
        String ipAddress = null;
        // ipAddress = this.getRequest().getRemoteAddr();
        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.getRemoteAddr();
            if (ipAddress.equals("127.0.0.1")) {
                // 根据网卡取本机配置的IP
                java.net.InetAddress inet = null;
                try {
                    inet = java.net.InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    logger.error("IP地址获取失败.", e);
                }
                ipAddress = 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 (ipAddress != null && ipAddress.length() > 15) {
            if (ipAddress.indexOf(",") > 0) {
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }
}
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