Socket

使用TCP

客户端

Socket socket = new Socket("ip", 端口);

InputStream is = socket.getInputStream();
DataInputStream dis = new DataInputStream(is);

OutputStream os = socket.getOutputStream();
DataInputStream dos = new DataOutputStream(os);

服务器端

ServerSocket serverSocket = new ServerSocket(端口);
Socket socket = serverSocket.accept();
//获取流的方式与客户端一样

读取输入流

byte[] buffer = new byte[1024]; 
do{ 
    int count = is.read(buffer); 
    if(count <= 0){ break; }
    else{ 
    // 对buffer保存或者做些其他操作 
        } 
    }
while(true);

使用UDP

客户端和服务器端一样的

DatagramSocket socket = new DatagramSocket(端口);
InetAddress serverAddress = InetAddress.getbyName("ip");
//发送
DatagramPackage packet = new DatagramPacket(buffer, length, host, port);
socket.send(packet);
//接收
byte[] buf = new byte[1024];
DatagramPacket packet = new DatagramPacket(buf, 1024);
Socket.receive(packet);