1.获取Windows下的IP
java.net.InetAddress.getLocalHost().getHostAddress();
2.获取linux下的IP
/**
* 获取Linux下的IP地址
*
* @return IP地址
* @throws SocketException
*/
private static String getLinuxLocalIp() throws SocketException {
String ip = "";
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
String name = intf.getName();
if (!name.contains("docker") && !name.contains("lo")) {
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
String ipaddress = inetAddress.getHostAddress().toString();
if (!ipaddress.contains("::") && !ipaddress.contains("0:0:")
&& !ipaddress.contains("fe80")) {
ip = ipaddress;
}
}
}
}
}
} catch (SocketException ex) {
ip = "127.0.0.1";
ex.printStackTrace();
}
return ip;
}
3.判断操作系统的类型
/**
* 判断操作系统是否是Windows
*
* @return
*/
public static boolean isWindowsOS() {
boolean isWindowsOS = false;
// 注：这里的system，系统指的是 JRE (runtime)system，不是指 OS
String osName = System.getProperty("os.name");
if (osName.toLowerCase().indexOf("windows") > -1) {
isWindowsOS = true;
}
return isWindowsOS;
}
4.最后将上面三个方法进行整合
/**
* 获取本地IP地址
*
* @throws SocketException
*/
public static String getLocalIP() throws UnknownHostException, SocketException {
if (isWindowsOS()) {
return InetAddress.getLocalHost().getHostAddress();
} else {
return getLinuxLocalIp();
}
}
5.这里关于System.getProperty("os.name")说明一下（参考自http://blog.****.net/brotherdong90/article/details/49073941）
key 注释
file.separator File separator (e.g., "/")
java.class.path Java classpath
java.class.version Java class version number
java.home Java installation directory
java.vendor Java vendor-specific string
java.vendor.url Java vendor URL
java.version Java version number
line.separator Line separator
os.arch Operating system architecture
os.name Operating system name
path.separator Path separator (e.g., ":")
user.dir User's current working directory
user.home User home directory
user.name User account name
