javaEE：獲取用戶IP

/**
 * 獲取用戶真實IP地址，不使用request.getRemoteAddr();的原因是有可能用戶使用了代理軟件方式避免真實IP地址,
 * 如果通過了多級反向代理的話，X-Forwarded-For的值並不止一個，而是一串IP值，所以取X-Forwarded-For中第一個非unknown的有效IP字符串。
 *
 * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
 * 192.168.1.100
 *
 * 用戶真實IP爲： 192.168.1.110
 *
 * @param request
 * @return
 */
public static String getIpAddress(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.getHeader("HTTP_CLIENT_IP");
    }
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getHeader("HTTP_X_FORWARDED_FOR");
    }
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
        ip = request.getRemoteAddr();
    }
    return ip;

}

 

/**
 *在攔截器中測試
 */

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception{

        logger.debug("CommonLoginInterceptor ____ requst server name:" + request.getServerName());
        logger.debug("CommonLoginInterceptor ____ request client: " + this.getIpAddress(request));
        logger.debug("CommonLoginInterceptor ____ request url:" + request.getRequestURL());
        logger.debug("CommonLoginInterceptor ____ request params:" + request.getQueryString());
//        List<UserRoleMenuVo> userRoleMenuVos = roleMenuService.queryUserRoleMenuList(userId);
        return true;
    }