Question

java如何获取当前登录ip

Answer 1

为适应不同的网络情况，提供这个类：看下面的代码吧，Copy过去就能用。
import javax.servlet.http.HttpServletRequest;

public class HttpUtil {

public static 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;
}
}

Answer 2

第一种：获取本机的IP

Enumeration<NetworkInterface> netInterfaces = null;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface ni = netInterfaces.nextElement();
System.out.println("DisplayName:" + ni.getDisplayName());
System.out.println("Name:" + ni.getName());
Enumeration<InetAddress> ips = ni.getInetAddresses();
while (ips.hasMoreElements()) {
System.out.println("IP:" + ips.nextElement().getHostAddress());
ipTemp= ni.getInetAddresses().nextElement().getHostAddress();
if(ipTemp!="127.0.0.1" && !"127.0.0.1".equals(ipTemp))
{
ip=ipTemp;
}
}
}
}catch(Exception ee)
{
ee.printStackTrace();
}

第二种：也是本机的：
InetAddress addr = InetAddress.getLocalHost();
ip=addr.getHostAddress().toString();//获得本机IP

Answer 3

request.getRemoteAddr();