获取ip地址

如果Linux系统是刚建的，ifconfig找不到

ifconfig

yum install ifconfig
//报错
yum search ifconfig
//最后一行如果有net-tools.x86_64
yum install net-tools

ipconfig

//html引入


//js测试
console.info(returnCitySN["cip"]);

 注意：http和https请求头都可以查到ip地址，推荐https，实际项目中如果使用HTTP请求，则无影响，若项目使用https，这里地址必须也是https，否则前端报错returnCitySN未定义

转载于两种快速查询主机公网IP的方法_Thomas_Lean的博客-CSDN博客_公网ip查询

• http://ip.42.pl/raw
• https://ifconfig.me/ip
• http://jsonip.com
• http://httpbin.org/ip
• https://api.ipify.org/?format=json

$. ajax( {
    url :'https://api.ipify.org/?format=json',
    type :'get' ,
    success : function(rel){
        console. info(rel) ;
    }
})

import java.net.InetAddress;
 
public class Main {
   public static void main(String[] args) 
   throws Exception {
      InetAddress addr = InetAddress.getLocalHost();
      System.out.println("Local HostAddress: 
      "+addr.getHostAddress());
      String hostname = addr.getHostName();
      System.out.println("Local host name: "+hostname);
   }
}