java獲取真實的IP地址工具類

在實際項目中，有調用微信支付完成支付功能，在微信支付的請求參數中需要傳遞一個本機的ip地址，java代碼運行環境目前為windows10以及centos7.

以下為獲取ip地址工具類：

package com.dq.schooldomain.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.UnknownHostException;
import java.util.Enumeration;
/**
 * @Author Allen.Lv
 * @Description //TODO 
 * @Date 9:50 2019/4/11
 * @Desc: Coding Happy!
 **/
public class IpAddress {
    public static InetAddress getLocalHostLANAddress() throws UnknownHostException {
        try {
            InetAddress candidateAddress = null;
            // 遍歷所有的網絡接口
            for (Enumeration ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements();) {
                NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
                // 在所有的接口下再遍歷IP
                for (Enumeration inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements();) {
                    InetAddress inetAddr = (InetAddress) inetAddrs.nextElement();
                    if (!inetAddr.isLoopbackAddress()) {// 排除loopback類型地址
                        if (inetAddr.isSiteLocalAddress()) {
                            // 如果是site-local地址，就是它了
                            return inetAddr;
                        } else if (candidateAddress == null) {
                            // site-local類型的地址未被發現，先記錄候選地址
                            candidateAddress = inetAddr;
                        }
                    }
                }
            }
            if (candidateAddress != null) {
                return candidateAddress;
            }
            // 如果沒有發現 non-loopback地址.只能用最次選的方案
            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;
        }
    }
}

 

在服務器上跑代碼可以測試