标签:and 靠谱 can util uri vat except || 记录
项目中遇到了要获取本地ip的需求,网上查找资料遇到很多坑,很多Java获取本机ip地址的方法要么是根本获取不到,要么是获取的有问题。
网上常见的方法如下
InetAddress.getLocalHost().getHostAddress()
但是如果电脑里面有Lan,WIFI,蓝牙热点,虚拟机网卡,即存在很多的网络接口(network interfaces),每个网络接口就包含一个IP地址,并不是所有的IP地址能被外部或局域网访问,比如说虚拟机网卡地址等等。上面获取到的ip就会有误。
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.UnknownHostException;
import java.util.Enumeration;
public class getRealIp {
public static void main(String[] args) {
try {
// 正确的IP拿法
System.out.println("get LocalHost LAN Address : " + getLocalHostLANAddress().getHostAddress());
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
// 正确的IP拿法,即优先拿site-local地址
private static InetAddress getLocalHostLANAddress() throws UnknownHostException {
try {
InetAddress candidateAddress = null;
// 遍历所有的网络接口
for (Enumeration ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements();) {
NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
// 在所有的接口下再遍历IP
for (Enumeration inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements();) {
InetAddress inetAddr = (InetAddress) inetAddrs.nextElement();
if (!inetAddr.isLoopbackAddress()) {// 排除loopback类型地址
if (inetAddr.isSiteLocalAddress()) {
// 如果是site-local地址,就是它了
return inetAddr;
} else if (candidateAddress == null) {
// site-local类型的地址未被发现,先记录候选地址
candidateAddress = inetAddr;
}
}
}
}
if (candidateAddress != null) {
return candidateAddress;
}
// 如果没有发现 non-loopback地址.只能用最次选的方案
InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
if (jdkSuppliedAddress == null) {
throw new UnknownHostException("The JDK InetAddress.getLocalHost() method unexpectedly returned null.");
}
return jdkSuppliedAddress;
} catch (Exception e) {
UnknownHostException unknownHostException = new UnknownHostException(
"Failed to determine LAN address: " + e);
unknownHostException.initCause(e);
throw unknownHostException;
}
}
}
参考博客地址:https://blog.csdn.net/u011809209/article/details/77236602
这里插上一句,上面的方法之前在java项目中能准确获取到ip,但是放在项目中之后,又不能获取准确的ip,也是很迷,然后又另外找了一种方法,如下:
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
/**
* 获取本地真正的IP地址,即获得有线或者无线WiFi地址。
* 过滤虚拟机、蓝牙等地址
*/
public class getRealLocalIP {
public static String getRealIP() {
try {
Enumeration<NetworkInterface> 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<InetAddress> 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;
}
}
参考博客地址:https://blog.csdn.net/yinshuomail/article/details/81624648
总之网上比较靠谱的方法就找到这两种,感谢其他博主的博客。
标签:and 靠谱 can util uri vat except || 记录
原文地址:https://www.cnblogs.com/ghq120/p/9572871.html