一、在Web请求中获取请求用户的真正IP：
public static String getUserRealIP(HttpServletRequest request) throws UnknownHostException {
String ip = "";
// 有的user可能使用代理，为处理用户使用代理的情况，使用x-forwarded-for
if (request.getHeader("x-forwarded-for") == null) {
ip = request.getRemoteAddr();
} else {
ip = request.getHeader("x-forwarded-for");
}
if ("127.0.0.1".equals(ip)) {
// 获取本机真正的ip地址
ip = InetAddress.getLocalHost().getHostAddress();
}
return ip;
}
二、获取本机ip地址和主机名：
import java.util.*;
import java.net.*;
public class getMyIP
{
public static void main(String[] args) {
String ip = null;
String host = null;
try{
InetAddress ia = InetAddress.getLocalHost();
host = ia.getHostName();//获取计算机名字
ip = ia.getHostAddress();//获取IP
} catch(UnknownHostException e) {
e.printStackTrace();
}
System.out.println(host);
System.out.println(IP);
}
}