java 获取客户端真实ip、局域网ip ip工具类

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已于 2022-02-10 22:46:30 修改 · 7k 阅读

2 ·

CC 4.0 BY-SA版权

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#java

于 2021-10-13 11:55:02 首次发布

该代码实现了一个IPUtils工具类，主要用于获取HttpServletRequest请求的IP地址，判断是否为内部IP，并提供了从IPv4地址字符串转换为字节的方法。此外，还包含了获取本地主机IP和主机名的功能，适用于网络通信和服务器环境中的IP处理。

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public class IpUtils
{
    public static String getIpAddr(HttpServletRequest request)
    {
        if (request == null)
        {
            return "unknown";
        }
        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("X-Forwarded-For");
        }
        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.getHeader("X-Real-IP");
        }

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
        {
            ip = request.getRemoteAddr()