java服务端获取客户端ip

最新推荐文章于 2024-01-08 13:56:25 发布

原创最新推荐文章于 2024-01-08 13:56:25 发布 · 540 阅读

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本文介绍了一种通过多种方式从HTTP请求中获取客户端真实IP地址的方法。该方法首先尝试从x-forwarded-for、Proxy-Client-IP、WL-Proxy-Client-IP等头部信息获取IP地址，如果这些头部不存在或者为unknown，则使用request.getRemoteAddr()获取客户端IP。

String getClientIP(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();
	}
	return ip;
}