获取IP

于 2013-01-18 16:17:00 发布 · 125 阅读

本文介绍了一种通过Java代码从HttpServletRequest请求中获取客户端真实IP地址的方法。该方法首先尝试从请求头中读取x-forwarded-for字段，如果未找到则继续检查Proxy-Client-IP和WL-Proxy-Client-IP，最后如果所有方法都未能获取到IP，则直接使用request.getRemoteAddr()获取客户端地址。

public String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}