[英]Byte buffer transfer via UDP
您能否提供一個通過UDP數據報在兩個Java類之間傳輸的字節緩沖區的示例?
這個怎么樣 ?
import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetSocketAddress; public class Server { public static void main(String[] args) throws IOException { DatagramSocket socket = new DatagramSocket(new InetSocketAddress(5000)); byte[] message = new byte[512]; DatagramPacket packet = new DatagramPacket(message, message.length); socket.receive(packet); System.out.println(new String(packet.getData(), packet.getOffset(), packet.getLength())); } }
import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetSocketAddress; public class Client { public static void main(String[] args) throws IOException { DatagramSocket socket = new DatagramSocket(); socket.connect(new InetSocketAddress(5000)); byte[] message = "Oh Hai!".getBytes(); DatagramPacket packet = new DatagramPacket(message, message.length); socket.send(packet); } }
@沒有
DatagramSocket類肯定需要完善,DatagramChannel對於客戶端來說稍好一些,但是對於服務器編程卻令人困惑。 例如:
import java.io.IOException; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.DatagramChannel; public class Client { public static void main(String[] args) throws IOException { DatagramChannel channel = DatagramChannel.open(); ByteBuffer buffer = ByteBuffer.wrap("Oh Hai!".getBytes()); channel.send(buffer, new InetSocketAddress("localhost", 5000)); } }
帶上JSR-203我說
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