如何确定使用Java连接到Internet的网络接口？例如,我跑
InetAddress.getLocalHost().getHostAddress();
在Eclipse中,这完全返回我想要的内容,192.168.1.105.但是,如果我将其打包到jar文件并运行该程序,则代码返回169.254.234.50.看看这个,我发现这是我机器上的VMware虚拟以太网适配器接口的IP地址.
有没有办法确定连接到互联网的接口,但同时保持我的代码的可移植性？
接口比较
界面[net4]
display name : Intel(R) Centrino(R) Ultimate-N 6300 AGN
MTU : 1500
loopback : false
point to point: false
up : true
virtual : false
multicast : true
HW address : 00 24 D7 2C 5F 70
INET address (IPv4): 192.168.1.105
host name : MyComputer
canonical host name : MyComputer
loopback : false
site local : true
any local : false
link local : false
multicast : false
reachable : true
界面[eth5]
display name : …我需要获取运行该程序的系统的mac地址.但我无法做到这一点.
我正在编写以下代码:
public class App{
public static void main(String[] args){
InetAddress ip;
try {
ip = InetAddress.getLocalHost();
System.out.println("Current IP address : " + ip.getHostAddress());
NetworkInterface network = NetworkInterface.getByInetAddress(ip);
byte[] mac = network.getHardwareAddress();
System.out.print("Current MAC address : ");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < mac.length; i++) {
sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
}
System.out.println(sb.toString());
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e){
e.printStackTrace();
}
}
}
我得到以下结果: …
我在获取机器的mac地址时遇到了问题,使用以下代码解决了这个问题:
Process p = Runtime.getRuntime().exec("getmac /fo csv /nh");
java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(p.getInputStream()));
String line;
line = in.readLine();
String[] result = line.split(",");
System.out.println(result[0].replace('"', ' ').trim());
但是,我想知道为什么这段代码不起作用.每次读取MAC地址时,它都会返回不同的值.首先我认为这是因为getHash,可能使用我不知道的时间戳......但即使删除它,结果也会改变.
码
public static byte[] getMacAddress() {
try {
Enumeration<NetworkInterface> nwInterface = NetworkInterface.getNetworkInterfaces();
while (nwInterface.hasMoreElements()) {
NetworkInterface nis = nwInterface.nextElement();
if (nis != null) {
byte[] mac = nis.getHardwareAddress();
if (mac != null) {
/*
* Extract each array of mac address and generate a
* hashCode for it
*/
return mac;//.hashCode(); …我想得到机器的MAC地址..但是下面写的代码只显示互联网连接到我的机器的MAC地址,否则它将返回null ...我正在使用Windows 7
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
class test
{
public static void main(String[] args)
{
InetAddress ip;
try {
ip = InetAddress.getLocalHost();
System.out.println("The mac Address of this machine is :" + ip.getHostAddress());
NetworkInterface network = NetworkInterface.getByInetAddress(ip);
byte[] mac = network.getHardwareAddress();
System.out.print("The mac address is : ");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < mac.length; i++){
sb.append(String.format("%02X%s", mac[i],(i< mac.length - 1)?"-":""));
}
System.out.println(sb.toString());
}
catch (UnknownHostException e) {
e.printStackTrace();
}
catch …我正在尝试在scala应用程序中获取我的机器的MAC地址.搜索时有几个结果,但它们都使用如下所示的内容,InetAddress.getLocalHost()后面跟着NetworkInterface.getByInetAddress(...):使用Java在本地计算机上获取MAC地址
我的问题是结果最终为null:
val localhost = InetAddress.getLocalHost
println(s"lh: $localhost")
val localNetworkInterface = NetworkInterface.getByInetAddress(localhost)
println(s"lni: $localNetworkInterface")
>>lh: ubuntu/127.0.1.1
>>lni: null