我要评论起因是公司一个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
总结
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