Java gets the IP of this machine (Linux and Windows)

[TOC]

Describe

Since the project is deployed on the cluster, it is necessary for the project to automatically collect information from each machine. Java.net.InetAddress.getLocalHost () to obtain the IP and machine name information for the local machine, but found that the actual IP and machine name information for the machine could not be obtained under Linux (obtained by localhost/127.0.0.1).

Scenario Description

Depending on the system type (Linux, Windows), the IP information of the local machine is obtained in different ways.

Get IP under Windows

java.net.InetAddress.getLocalHost().getHostAddress();

Get the IP under Linux

    /*** Get the IP address under Linux     *     * @returnIP Address     * @throws socketexception     */    Private StaticStringGetlinuxlocalip()throwssocketexception {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(); }returnip }

Determine the type of operating system

 /**   * Judging operating system is No is Windows   *   * @return   */ 
    
     public  
     static  
     boolean  
      () {boolean  Iswindowsos = false ;        //Note: The system here refers to the JRE (runtime) systems, not the OS  String osname = System. getproperty         ( "Os.name" ); if  (Osname. tolowercase  (). indexof  ( "Windows" ) >-1 ) {Iswindowsos = true;    } return  Iswindowsos; }
    

Here is a description of System.getproperty ("Os.name") (refer to from http://blog.csdn.net/brotherdong90/article/details/49073941)

Key	Notes
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

Finally, the above three methods are integrated

    /**     * 获取本地IP地址     *     * @throws SocketException     */    publicstaticgetLocalIPthrows UnknownHostException, SocketException {        if (isWindowsOS()) {            return InetAddress.getLocalHost().getHostAddress();        else {            returngetLinuxLocalIp();        }    }

Reference

Https://www.cnblogs.com/raphael5200/p/5996464.html

Java gets the IP of this machine (Linux and Windows)