tcpip.java

用JAVA编网页编程示例

//---------------------------------------------------------------------------- 
//head.oak 
//import java.applet.Applet;
//import java.awt.image.*;
//import java.awt.*;
import java.net.*;
import java.util.*;
import java.io.*;
import java.*;

public class tcpip
{
	protected Socket s;
	public DataInputStream dis;
	protected DataOutputStream dos;
	protected int buffer= 124;
	protected int dlength = 124;
	
			
public synchronized void disconnect()
{
}	
		
public synchronized void send(String given, boolean close)
{
	send(transS(given), close);
}

public synchronized void send(byte[] given, boolean close)
{
	int le= given.length;
	byte[] temp= new byte[le];
	for(int i= 0; i< le; i++)
		temp[i]= given[i];
	try
	{
		dos= new DataOutputStream(new BufferedOutputStream(s.getOutputStream()));
		dos.write(temp, 0, temp.length);
		dos.flush();
		if(close)
			dos.close();
	}
	catch(Exception ex)
	{
	    System.out.println("Error sending data : " + ex.toString());
	}
}

public synchronized byte[] receive(boolean close)
{
	byte[] retval= new byte[0];
	try
	{   
			
		dis= new DataInputStream(new BufferedInputStream(s.getInputStream()));
		if (dis.available ()!=0) {
		retval= new byte[dis.available()];
		dis.read(retval);
		}
		if(close)
			dis.close();
	}
	catch(Exception ex)
	{
	System.out.println("Error in receive exception Routine");
	}
 	return(retval);
}

public synchronized char rec(boolean close)
{
	byte retval[]= new byte[1];
	try
	{
		boolean rec_data = false;
		dis= new DataInputStream(new BufferedInputStream(s.getInputStream()));
		while((rec_data == false)&&(close == false)){
			if(dis.available()!=0)
				rec_data = true;
		}			
		retval= new byte[dis.available()];
		dis.read(retval);
		if((char)retval[0] == 0x1B)
		dis.close();
	}
	catch(Exception ex)
	{
		System.out.println("Error in receive exception Routine");
	}
	return((char)retval[0]);
}

public tcpip(Socket _given)
{
	s= _given;
	
		
}

public byte[] transS(String given)
{
	int length= given.length();
	byte[] retvalue= new byte[length];
	given.getBytes(0, length, retvalue, 0);
	return(retvalue);    
}

}