JAVA如何获取访问真实IP地址？

解决方法：

获取请求主机IP地址,如果通过代理进来，则透过防火墙获取真实IP地址，如果没有代理，则获取真实ip

public static String getIp(HttpServletRequest request){

//代理进来，则透过防火墙获取真实IP地址

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.getHeader("X-Real-IP");

   }

 

//如果没有代理，则获取真实ip

if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getRemoteAddr();

}

 

return ip.equals("0:0:0:0:0:0:0:1")?"127.0.0.1":ip;

}