Java 工具类 IpUtil - 获取本机所有 IP 地址，LocalHost 对应地址 IP

你的名字 2021-12-01 12:52 664阅读 0赞

### Java 工具类 IpUtil - 获取本机所有 IP 地址，LocalHost 对应地址 IP ###

IP 工具类

**源代码：**

/** * <p> * * @author XiaoPengwei * @since 2019-07-20 */
    import java.net.Inet4Address;
    import java.net.InetAddress;
    import java.net.NetworkInterface;
    import java.net.SocketException;
    import java.net.UnknownHostException;
    import java.util.Enumeration;
    
    
    public class IpUtil { 
    
        public static void main(String[] args) { 
    
            IpUtil testGetIP = new IpUtil();
    
            System.out.println("Your LocalHost IP(ipv4) is:");
    
            System.out.println(testGetIP.getIP());
    
            System.out.println("\nHere are all your IPS:");
            testGetIP.printAllIp();
        }
    
        /** * Fond LocalHost ipv4 * * @return java.lang.String */
        public String getIP() { 
            try { 
                // 根据 hostname 找 ip
                InetAddress address = InetAddress.getLocalHost();
                if (address.isLoopbackAddress()) { 
                    Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
                    while (allNetInterfaces.hasMoreElements()) { 
                        NetworkInterface netInterface = allNetInterfaces.nextElement();
                        Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
                        while (addresses.hasMoreElements()) { 
                            InetAddress ip = addresses.nextElement();
                            if (!ip.isLinkLocalAddress() && !ip.isLoopbackAddress() && ip instanceof Inet4Address) { 
                                return ip.getHostAddress();
                            }
                        }
                    }
                }
                return address.getHostAddress();
            } catch (UnknownHostException | SocketException e) { 
                e.printStackTrace();
                return null;
            }
        }
    
        /** * Find all network interfaces */
        public void printAllIp() { 
            try { 
                Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
                while (allNetInterfaces.hasMoreElements()) { 
                    NetworkInterface netInterface = allNetInterfaces.nextElement();
    
                    // Remove loopback interface, sub-interface, unrun and interface
                    if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp()) { 
                        continue;
                    }
    
                    Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
                    while (addresses.hasMoreElements()) { 
                        InetAddress ip = addresses.nextElement();
                        if (ip != null) { 
    
                            System.out.println("ip = " + ip.getHostAddress());
                            // ipv4
                            if (ip instanceof Inet4Address) { 
                                System.out.println("ipv4 = " + ip.getHostAddress());
    
                                if (!ip.getHostAddress().startsWith("192") && !ip.getHostAddress().startsWith("10") && !ip.getHostAddress().startsWith("172")) { 
                                    // Intranet
                                    ip.getHostAddress();
                                }
                            }
                        }
                    }
                }
            } catch (SocketException e) { 
                System.err.println("[Error] can't get host ip address" + e.getMessage());
            }
        }
    }