zhaojishun 的博客

• Nginx配置

proxy_set_header       X-Real-IP $remote_addr;  
   proxy_set_header       X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_set_header       X-Forwarded-For $http_x_forwarded_for;

• javautil

public static String getIpAddr(HttpServletRequest request){
        String ip = request.getHeader("X-Real-IP");
        if (!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
            return ip;
        }
        ip = request.getHeader("X-Forwarded-For");
        if (!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
// 多次反向代理后会有多个IP值，第一个为真实IP。
            int index = ip.indexOf(',');
            if (index != -1) {
                return ip.substring(0, index);
            } else {
                return ip;
            }
        } else {
            return request.getRemoteAddr();
        }
    }