网络编程udp/tcp/tomcat

来源：互联网发布：win10装mac虚拟机编辑：程序博客网时间：2024/04/30 01:28

udp:要考虑数据包的大小，防止数据丢失。64K大小

接收端：

DatagramSocket  socket = new DatagramSocket(9090);              //准备空的数据包用于存放数据。        byte[] buf = new byte[1024];        DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length); // 1024        //调用udp的服务接收数据        socket.receive(datagramPacket);        socket.close();

    发送端：

DatagramSocket datagramSocket = new DatagramSocket();        //准备数据，把数据封装到数据包中。        String data = "这个是我第一个udp的例子..";        //创建了一个数据包        DatagramPacket packet = new DatagramPacket(data.getBytes(), data.getBytes().length,InetAddress.getLocalHost() , 9090);        //调用udp的服务发送数据包        datagramSocket.send(packet);        //关闭资源 ---实际上就是释放占用的端口号        datagramSocket.close();udp实现群聊加`BufferedReader keyReader = new BufferedReader(new InputStreamReader(System.in));String line = null;DatagramPacket packet  = null;while((line = keyReader.readLine())!=null){      packet = new DatagramPacket(line.getBytes(), line.getBytes().length,   InetAddress.getByName("192.168.15.255"), 9090);  socket.send(packet)`boolean flag = true;while(flag){     socket.receive(packet); System.out.println(packet.getAddress().getHostAddress()+"Ëµ:"+new String(buf,0,packet.getLength()));}tcp:三次握手

Socket socket  = new Socket(InetAddress.getLocalHost(),9090);        OutputStream outputStream = socket.getOutputStream();        outputStream.write("aaa".getBytes());        InputStream inputStream = socket.getInputStream();        byte[] buf = new byte[1024];        int length = inputStream.read(buf);        System.out.println("aaa"+ new String(buf,0,length));        socket.close();

ServerSocket serverSocket = new ServerSocket(9090);        Socket socket  =  serverSocket.accept();         InputStream inputStream = socket.getInputStream();        byte[] buf = new byte[1024];        int length = 0;        length = inputStream.read(buf);        System.out.println("bbb"+ new String(buf,0,length));            OutputStream outputStream = socket.getOutputStream();        outputStream.write("aaa".getBytes());        serverSocket.close();

tomcat:

    OutputStream outputStream = socket.getOutputStream();        outputStream.write("<html><head><title>aaa</title></head><body>w</body></html>".getBytes());            socket.close();            ServerSocket serverSocket = new ServerSocket(9090);        while(true){            Socket socket = serverSocket.accept();            new TomcatDemo(socket).start();        }

阅读全文

0 0