本文介绍了如何在HTTP请求中获取客户端的IP地址，通过检查多个HTTP头来确定客户端的真实IP，包括x-forwarded-for、Proxy-Client-IP、WL-Proxy-Client-IP等，并在找不到有效IP时使用远程地址作为备份。
/**
* 获取客户端IP地址
* @param request
* @return
*/
public String getIpAddr(HttpServletRequest request){
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getRemoteAddr();
}
return ip;
}
* 获取客户端IP地址
* @param request
* @return
*/
public String getIpAddr(HttpServletRequest request){
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() < 1
|| "unknown".equalsIgnoreCase(ip)){
ip = request.getRemoteAddr();
}
return ip;
}
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