sendframe.java

这是一个用jsp+Oracle开发的联系人客户关系管理系统！

package com.test;

import java.net.*;
import java.awt.*;
import java.awt.event.*;

public class sendframe extends Frame implements Runnable,ActionListener
{
	TextField out_message = new TextField("发送数据:");
	TextArea in_message = new TextArea();
	Button b = new Button("发送数据包:");
	byte data[] = new byte[8192];
	DatagramPacket pack = null;

	//启动线程
	sendframe()
	{
		super("南京发送站");
		setSize(200,200);
		setVisible(true);
		b.addActionListener(this);
		add(out_message,"South");
		add(in_message,"Center");
		add(b,"North");
		pack = new DatagramPacket(data,data.length);
		Thread thread = new Thread(this);
		thread.start();
	}

	//主动式发送
	public void actionPerformed(ActionEvent event)
	{
		byte buffer[] = out_message.getText().trim().getBytes();
		try
		{
			InetAddress address = InetAddress.getByName("localhost");
			DatagramPacket data_pack = new DatagramPacket(buffer,buffer.length,address,888);
			DatagramSocket mail_data = new DatagramSocket();
			in_message.append("数据报目标主机地址:"+data_pack.getAddress()+"\n");
			in_message.append("数据报目标端口: "+data_pack.getPort()+"\n");
			in_message.append("数据报长度:"+data_pack.getLength()+"\n");
			mail_data.send(data_pack);
			in_message.append("发送888成功"+"\n");
		}catch(Exception e){in_message.append("发送888失败"+"\n");}
	}

	//线程监听接收
	public void run()
	{
		DatagramSocket mail_data = null;
		try
		{
			mail_data = new DatagramSocket(666);
		}catch(Exception e){}

		while(true)
		{
			if(mail_data==null)break;
			else
			{
				try
				{
					mail_data.receive(pack);
					int length = pack.getLength();
					InetAddress address = pack.getAddress();
					int port = pack.getPort();
					
					String message = new String(pack.getData(),0,length);
					in_message.append("收到的数据包长度:"+length+"\n");
					in_message.append("收到的数据包来自:"+address+";端口:"+port+"\n");
					in_message.append("收到的数据包为:"+message+"\n");
				}catch(Exception e){in_message.append("接收666失败"+"\n");}
			}
		}
	}

	public static void main(String args[])
	{
		sendframe mysend = new sendframe();
		mysend.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){System.exit(0);}
		});
		mysend.pack();
	}
};