Java获取请求ip地址，java获取ip, public S

Java获取请求ip地址，java获取ip, public S

    public String checkIpAddress(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;       }