Java获取电脑真实IP地址的示例代码

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
 

public class GetRealLocalIP {
 
  
  public static String getRealIP() {
    try {
      Enumeration allNetInterfaces = NetworkInterface
   .getNetworkInterfaces();
      while (allNetInterfaces.hasMoreElements()) {
 NetworkInterface netInterface = (NetworkInterface) allNetInterfaces
     .nextElement();
 
 // 去除回环接口，子接口，未运行和接口
 if (netInterface.isLoopback() || netInterface.isVirtual()
     || !netInterface.isUp()) {
   continue;
 }
 
 if (!netInterface.getDisplayName().contains("Intel")
     && !netInterface.getDisplayName().contains("Realtek")) {
   continue;
 }
 Enumeration addresses = netInterface
     .getInetAddresses();
 System.out.println(netInterface.getDisplayName());
 while (addresses.hasMoreElements()) {
   InetAddress ip = addresses.nextElement();
   if (ip != null) {
     // ipv4
     if (ip instanceof Inet4Address) {
System.out.println("ipv4 = " + ip.getHostAddress());
return ip.getHostAddress();
     }
   }
 }
 break;
      }
    } catch (SocketException e) {
      System.err.println("Error when getting host ip address"
   + e.getMessage());
    }
    return null;
  }
}

此代码中只要读取到了WiFi或者有线地址其中之一立即return。

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