dubbo服务多网卡IP问题

起因

更换电脑，dubbo服务不能调试，win7电脑好使，win10不行

分析

经过调试发现注册的ip地址，不是VPN分配的地址，多方面查找资料说ip排序的问题，尝试一下方法：

• 网络连接重新命名成一样的
• 设置网络活跃点数
• 2台电脑java版本安装一致

以上测试都不能解决，于是调试代码，发现NetUtils获取网卡是直接取的第一块网卡的地址，由于是静态对象，这样启动的时候，根据自己的规则先获取下，赋个初值就可以了，代码如下：

package com.masg.test;

import com.alibaba.dubbo.common.utils.NetUtils;
import com.alibaba.dubbo.container.Main;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.util.regex.Pattern;

public class StartMain {

    public static void setFinalStatic(Field field, Object newValue) throws Exception {
        field.setAccessible(true);
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
        field.set(null, newValue);
    }

    public static InetAddress getLocalHost() throws UnknownHostException {
        Pattern IP_PATTERN = Pattern.compile("\\d{1,2}(\\.\\d{1,3}){3,5}$");
        try {
            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
            if (interfaces != null) {
                while (interfaces.hasMoreElements()) {
                    NetworkInterface network = (NetworkInterface) interfaces.nextElement();
                    Enumeration<InetAddress> addresses = network.getInetAddresses();
                    if (addresses != null) {
                        while (addresses.hasMoreElements()) {
                            InetAddress address = (InetAddress) addresses.nextElement();
                            if (address != null && !address.isLoopbackAddress()) {
                                String name = address.getHostAddress();
                                if (name != null && !"0.0.0.0".equals(name) && !"127.0.0.1".equals(name) && IP_PATTERN.matcher(name).matches()) {
                                    return address;
                                }
                            }
                        }
                    }
                }
            }
        } catch (Throwable var8) {
        }
        return null;
    }

    public static void main(String[] args) throws Exception {
        NetUtils net = new NetUtils();
        InetAddress address = getLocalHost();

        Class<NetUtils> netUtilsClass = (Class<NetUtils>) net.getClass();
        Field LOCAL_ADDRESS = netUtilsClass.getDeclaredField("LOCAL_ADDRESS");
        setFinalStatic(LOCAL_ADDRESS, address);

        System.setProperty("dubbo.protocol.dubbo.host", address.getHostAddress()); 

        Main.main(args);
    }
}