系统获取 IP 工具类
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
/**
* 系统获取IP工具类
*/
public final class IPUtil {
/**
* 取到当前机器的IP地址，这里可以直接获取该服务器的所有网卡ip，如果包括内外网网卡，就是两个ip，中间以,分隔。
*/
public static String getIp() {
String hostIp = null;
List<String> ips = new ArrayList<String>();
Enumeration<NetworkInterface> netInterfaces = null;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
while (netInterfaces.hasMoreElements()) {
NetworkInterface netInterface = netInterfaces.nextElement();
Enumeration<InetAddress> inteAddresses = netInterface.getInetAddresses();
while (inteAddresses.hasMoreElements()) {
InetAddress inetAddress = inteAddresses.nextElement();
if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
ips.add(inetAddress.getHostAddress());
}
}
}
} catch (SocketException ex) {
ex.printStackTrace();
}
hostIp = collectionToDelimitedString(ips, ",");
return hostIp;
}
/**
* 集合转化为连接字符串
*/
private static String collectionToDelimitedString(Collection<String> coll, String delim) {
if (coll == null || coll.isEmpty()) {
return "";
}
StringBuilder sb = new StringBuilder();
Iterator<?> it = coll.iterator();
while (it.hasNext()) {
sb.append(it.next());
if (it.hasNext()) {
sb.append(delim);
}
}
return sb.toString();
}
/**
* 获取服务器名称
*/
public static String getHostName() {
String hostName = null;
try {
hostName = InetAddress.getLocalHost().getHostName();
} catch (Exception e) {
e.fillInStackTrace();
}
return hostName;
}
public static void main(String[] args) {
System.out.println(IPUtil.getIp());
System.out.println(IPUtil.getHostName());
String[] strArr = {"Google", "Baidu", "IBM", "Github", "Stackoverflow"};
List<String> list = Arrays.asList(strArr);
String result = collectionToDelimitedString(list, "、");
System.out.println(result);
}
}
运行结果
```
192.168.50.116
DESKTOP-C6NCOA8
Google、Baidu、IBM、Github、Stackoverflow
```
192.168.50.116
DESKTOP-C6NCOA8
Google、Baidu、IBM、Github、Stackoverflow
```