java从HttpServletRequest中获取请求IP地址

最新推荐文章于 2024-01-04 14:49:58 发布

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#获取请求客户端IP

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本文介绍了两种从HttpServletRequest中获取客户端真实IP地址的方法。第一种方法通过检查多个请求头来确定IP，包括'x-forwarded-for'、'Proxy-Client-IP'和'WL-Proxy-Client-IP'，如果这些头不存在或为'unknown'，则使用'remoteAddr'。第二种方法简化了这一过程，直接返回'x-forwarded-for'头或'remoteAddr'。

public static String getRealIp(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;
}

public static String getRealIpV2(HttpServletRequest request) {
    String accessIp= request.getHeader("x-forwarded-for");
    return null == accessIp ? request.getRemoteAddr() : accessIp;
}