java程序写一段对ubuntu16系统网络配置文件编辑的代码多个网卡

以下是使用 Java 编写的 Ubuntu 16 系统网络配置文件编辑的示例代码，支持多个网卡：

import java.io.*;

public class NetworkConfigEditor {
    public static void editNetworkConfig(String interfaceName, String ipAddress, String netmask, String gateway) {
        try {
            File configFile = new File("/etc/network/interfaces");
            BufferedReader reader = new BufferedReader(new FileReader(configFile));
            StringBuilder builder = new StringBuilder();
            String line;
            boolean isInterfaceFound = false;
            while ((line = reader.readLine()) != null) {
                if (line.startsWith("auto " + interfaceName)) {
                    isInterfaceFound = true;
                }
                if (line.startsWith("iface " + interfaceName)) {
                    builder.append("iface " + interfaceName + " inet static\n");
                    builder.append("address " + ipAddress + "\n");
                    builder.append("netmask " + netmask + "\n");
                    builder.append("gateway " + gateway + "\n");
                } else {
                    builder.append(line + "\n");
                }
            }
            reader.close();
            if (!isInterfaceFound) {
                builder.append("\nauto " + interfaceName + "\n");
                builder.append("iface " + interfaceName + " inet static\n");
                builder.append("address " + ipAddress + "\n");
                builder.append("netmask " + netmask + "\n");
                builder.append("gateway " + gateway + "\n");
            }
            BufferedWriter writer = new BufferedWriter(new FileWriter(configFile));
            writer.write(builder.toString());
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        // 示例：配置 eth0 网卡
        editNetworkConfig("eth0", "192.168.1.100", "255.255.255.0", "192.168.1.1");
        // 示例：配置 eth1 网卡
        editNetworkConfig("eth1", "192.168.2.100", "255.255.255.0", "192.168.2.1");
    }
}

请根据实际情况修改示例代码中的 IP 地址、子网掩码和网关地址等信息。注意，此代码需要在 root 用户下运行才能修改 `/etc/network/interfaces` 文件。