java获取客户端ip地址

java获取客户端ip地址

    /**
     * 获取客户端IP
     *
     * @param request 请求对象
     * @return IP地址
     */
    public static String getIpAddr(HttpServletRequest request) {
        if (request == null) {
            return "unknown";
        }
        String ip = request.getHeader("x-forwarded-for");
        if (ipIsNull(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ipIsNull(ip)) {
            ip = request.getHeader("X-Forwarded-For");
        }
        if (ipIsNull(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipIsNull(ip)) {
            ip = request.getHeader("X-Real-IP");
        }
        if (ipIsNull(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
    public static boolean ipIsNull(String ip) {
        boolean flag = (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) ? true : false;
        return flag;
    }

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