java - 通过网络发送文件 - JAVA

Question

我正在编写一个应用程序，该应用程序的所有者必须能够将文件发送到网络中的其他可用设备。此时我可以检索连接到网络的设备的所有 IP 地址。

如果我有这些设备的内部 IP 地址，是否可以将文件发送到这些设备

当前代码:

InetAddress localhost = null;
    try {
        localhost = InetAddress.getLocalHost();
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    // this code assumes IPv4 is used
    byte[] ip = localhost.getAddress();

    for (int i = 1; i <= 254; i++)
    {
        ip[3] = (byte)i;
        InetAddress address = null;
        try {
            address = InetAddress.getByAddress(ip);
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    try {
        if (address.isReachable(100))
        {
            System.out.println(address + " machine is turned on and can be pinged");
        }
        else if (!address.getHostAddress().equals(address.getHostName()))
        {
            System.out.println(address + " machine is known in a DNS lookup");
        }
        else
        {
            System.out.println(address + " the host address and host name are equal, meaning the host name could not be resolved");
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    }

Answer 1

您必须在目标设备上有一些备用设备 - 一个将接收文件的应用程序。或者，您可以使用内置组件和硬件(例如蓝牙)共享文件。