「Java入門」HttpServletRequestによる訪問者のIPアドレスを取得する方法

2014年9月5日

Javaコード：
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;
}