java获取客户端ip

最新推荐文章于 2023-08-17 10:52:03 发布

转载最新推荐文章于 2023-08-17 10:52:03 发布 · 407 阅读

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本文介绍了一种通过Java代码从HttpServletRequest对象中获取客户端真实IP地址的方法。该方法首先尝试从请求头中读取x-forwarded-for字段，如果未找到则继续检查Proxy-Client-IP和WL-Proxy-Client-IP等字段，最后若所有尝试均失败，则使用request.getRemoteAddr()来获取IP地址。

public String getIpAddr(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;
    }