通过httprequest获取用户ip

最新推荐文章于 2023-09-23 04:31:52 发布

Mr_Lonely_Jeff

最新推荐文章于 2023-09-23 04:31:52 发布

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分类专栏：关于java的乱七八糟文章标签：获取ip

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本文介绍了一种在Java中通过HttpServletRequest获取客户端真实IP地址的方法，包括透过代理服务器获取真实IP的过程。该方法尝试从多种头部信息中获取IP，确保了在不同网络环境下都能准确获得客户端IP。

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import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;


public final class NetworkUtil {
	private static Logger logger = Logger.getLogger(NetworkUtil.class);

	/**
	 * 获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址;
	* @Title: getIpAddress 
	* @Description: TODO 
	* @param @param request
	* @param @return
	* @param @throws IOException     
	* @return String     
	* @throws 
	* @author zhangjf
	 */
	public final static String getIpAddress(HttpServletRequest request) throws IOException {
		String ip = request.getHeader("X-Forwarded-For");
		if (logger.isInfoEnabled()) {
			logger.info("getIpAddress(HttpServletRequest) - X-Forwarded-For - String ip=" + ip);
		}

		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("Proxy-Client-IP");
				if (logger.isInfoEnabled()) {
					logger.info("getIpAddress(HttpServletRequest) - Proxy-Client-IP - String ip=" + ip);
				}
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("WL-Proxy-Client-IP");
				if (logger.isInfoEnabled()) {
					logger.info("getIpAddress(HttpServletRequest) - WL-Proxy-Client-IP - String ip=" + ip);
				}
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("HTTP_CLIENT_IP");
				if (logger.isInfoEnabled()) {
					logger.info("getIpAddress(HttpServletRequest) - HTTP_CLIENT_IP - String ip=" + ip);
				}
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("HTTP_X_FORWARDED_FOR");
				if (logger.isInfoEnabled()) {
					logger.info("getIpAddress(HttpServletRequest) - HTTP_X_FORWARDED_FOR - String ip=" + ip);
				}
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getRemoteAddr();
				if (logger.isInfoEnabled()) {
					logger.info("getIpAddress(HttpServletRequest) - getRemoteAddr - String ip=" + ip);
				}
			}
		} else if (ip.length() > 15) {
			String[] ips = ip.split(",");
			for (int index = 0; index < ips.length; index++) {
				String strIp = (String) ips[index];
				if (!("unknown".equalsIgnoreCase(strIp))) {
					ip = strIp;
					break;
				}
			}
		}
		return ip;
	}
}