分类： 2011-11-10 10:07 848人阅读 (0)  

参考别人一幅原理图。

 

 

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class UDPClient
{
    private DatagramSocket client=null;
    private DatagramPacket packet=null;
    private InetAddress host=null;
    public static int portSend=8888;
    public static String name="192.168.142.199";


    public UDPClient()
    {
        try
        {
            host = InetAddress.getByName(name);
            client=new DatagramSocket();

            System.out.println("客户端准备就绪");
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public void UDPClientRun(byte[] buffer) throws IOException
    {
        host = InetAddress.getByName(name);
        packet=new DatagramPacket(buffer,buffer.length, host, portSend);
        client.send(packet);
        System.out.println("客户端发送消息");
    }

    public void UDPClientStop()
    {
        client.close();
    }
}

 

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class UDPService
{
    private DatagramSocket server =null;
    private DatagramPacket dPacket=null;
    private byte[] buffer = new byte[640];
    public static int portServer=8888;

    public UDPService ()
    {
        try
        {
            server  = new DatagramSocket(portServer);
            dPacket = new DatagramPacket(buffer, buffer.length);
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public byte[] UDPServiceRun()
    {
        try
        {
            server.receive(dPacket);
            System.out.println("服务端接收到消息");
        } catch (IOException e)
        {
            e.printStackTrace();
            System.out.println("服务端未收到消息");
        }
        return buffer;
    }

    public void UDPSeverStop()
    {
        server.close();
    }

    public String getClientName()
    {
        String name="";
        name=dPacket.getAddress().toString();
        return name;
    }

}