java获取真实的IP地址工具类

在实际项目中，有调用微信支付完成支付功能，在微信支付的请求参数中需要传递一个本机的ip地址，java代码运行环境目前为windows10以及centos7.

以下为获取ip地址工具类：

 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;
         }
     }
 }

在服务器上跑代码可以测试