起因是公司一个springboot项目启动类打印了本机IP地址加端口号,方便访问项目页面,但是发现打印出来的不是“无线局域网”的ip而是“以太网适配器”ip,如下图所示
这样就导致后续本地起项目连接xxl-job注册节点的时候因为不在同个局域网下ping不通出问题,所以需要解决一下。
一、直接获取本机IP(会受到虚拟机干扰)
public static String getInterIP1() throws Exception {
return InetAddress.getLocalHost().getHostAddress();
}
二、获取本机IP(排除虚拟机干扰)
public 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;
}
}
三、获取本机公网IP
public static String getOutIP() {
try {
URL whatismyip = new URL("http://checkip.amazonaws.com");
BufferedReader in = new BufferedReader(new InputStreamReader(whatismyip.openStream()));
String ip = in.readLine();
return ip;
} catch (Exception e) {}
return "";
}
四、测试
public class IpTest {
public static void main(String[] args) throws Exception {
System.out.println("获取本机ip: " + getInterIP1());
// System.out.println("getInterIP2: " + getInterIP2());
System.out.println("获取本机ip(排除虚拟机干扰): " + String.valueOf(getLocalHostLANAddress()).substring(1));
// System.out.println("getOutIPV4: " + getOutIPV4());
System.out.println("获取本机公网ip: " + getOutIP());
}
public static String getInterIP1() throws Exception {
return InetAddress.getLocalHost().getHostAddress();
}
public 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;
}
}
public static String getOutIP() {
try {
URL whatismyip = new URL("http://checkip.amazonaws.com");
BufferedReader in = new BufferedReader(new InputStreamReader(whatismyip.openStream()));
String ip = in.readLine();
return ip;
// System.out.println("Public IP Address: " + ip);
} catch (Exception e) {
// System.out.println("Error occurred: " + e.getMessage());
}
return "";
}
}
获取本机ip: 172.17.16.1
获取本机ip(排除虚拟机干扰): 192.168.100.100
获取本机公网ip: 14.145.43.147
这里打印出来的便对应上前言命令行截图里的ip信息,然后公网ip对应的是百度搜索ip查到的公网ip地址
五、手动禁用虚拟机排除干扰
除了用代码逻辑排除虚拟机干扰,我们也可以直接禁用电脑的虚拟机适配器。
步骤:
- win+R
- devmgmt.msc 打开设备管理器
- 找到网络适配器-Hyper-V Virtual 开头的 右键禁用
此时win+R cmd 输入ipconfig,可以看到已经没有虚拟机ip了
此时java使用
InetAddress.getLocalHost().getHostAddress()
也可以获取到192.168开头的wifi地址了