smsserialdriver.java

手机发短信程序

//

package edu.soft.buaa.message.sms;

import java.io.*;
import java.util.*;

import javax.comm.*;

/**
	This class handles the operation the serial port.
	<br><br>
	This class contains all the necessary (low-level) functions that handle COMM API
	and are responsible for the serial communication with the GSM device.
	<br><br>
	Comments left to be added in next release.
*/
class SMSSerialDriver  implements SerialPortEventListener
{
	/**
		Timeout period for the phone to respond to jSMSEngine.
	*/
	private static final int RECV_TIMEOUT = 3 * 1000;

	/**
		Input/Output buffer size for serial communication.
	*/
	private static final int BUFFER_SIZE = 8192;

	/**
		Delay (20ms) after each character sent. Seems that some mobile phones
		get confused if you send them the commands without any delay, even
		in slow baud rate.
	*/
	private static final int DELAY_BETWEEN_CHARS = 5;

	private String port;
	private int baud;
	private int dataBits;
	private int stopBits;
	private int parity;

	private CommPortIdentifier portId;
	private SerialPort serialPort;
	private InputStream inStream;
	private OutputStream outStream;



	public SMSSerialDriver(String port, int baud)
	{
		this.port = port;
		this.baud = baud;
	
		dataBits = SerialPort.DATABITS_8;
		stopBits = SerialPort.STOPBITS_1;
		parity = SerialPort.PARITY_NONE;
	}

	public void setPort(String port) { this.port = port; }
	public String getPort() { return port; }
	public int getBaud() { return baud; }
	public int getDataBits() { return dataBits; }
	public int getStopBits() { return stopBits; }
	public int getParity() { return parity; }

	public boolean open() throws Exception
	{
		boolean result = false;
		Enumeration portList;

		
		portList = CommPortIdentifier.getPortIdentifiers();
		while (portList.hasMoreElements())
		{
			portId = (CommPortIdentifier) portList.nextElement();
			if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL)
				if (portId.getName().equalsIgnoreCase(getPort()))
				{
					serialPort = (SerialPort) portId.open("jSMSEngine", 1000);
					inStream = serialPort.getInputStream();
					outStream = serialPort.getOutputStream();
					serialPort.notifyOnDataAvailable(true);
					serialPort.notifyOnOutputEmpty(true);
					serialPort.notifyOnBreakInterrupt(true);
					serialPort.notifyOnFramingError(true);
					serialPort.notifyOnOverrunError(true);
					serialPort.notifyOnParityError(true);
					serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
					serialPort.addEventListener(this);
					serialPort.setSerialPortParams(getBaud(), getDataBits(), getStopBits(), getParity());
					serialPort.setInputBufferSize(BUFFER_SIZE);
					serialPort.setOutputBufferSize(BUFFER_SIZE);
					serialPort.enableReceiveTimeout(RECV_TIMEOUT);
					result = true;
				}
		}
		return result;
	}

	public void close()
	{
		
		try { serialPort.close(); } catch (Exception e) {}
	}

	public void serialEvent(SerialPortEvent event)
	{
		switch(event.getEventType())
		{
			case SerialPortEvent.BI:
				break;
			case SerialPortEvent.OE:
				
				break;
			case SerialPortEvent.FE:
				
				break;
			case SerialPortEvent.PE:
				
				break;
			case SerialPortEvent.CD:
				break;
			case SerialPortEvent.CTS:
				break;
			case SerialPortEvent.DSR:
				break;
			case SerialPortEvent.RI:
				break;
			case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
				break;
			case SerialPortEvent.DATA_AVAILABLE:
				break;
		}
	}
	public void clearBuffer() throws Exception
	{
		while (dataAvailable()) inStream.read();
	}

	public void send(String s) throws Exception
	{
		
		for (int i = 0; i < s.length(); i ++)
		{
			try { Thread.sleep(DELAY_BETWEEN_CHARS); } catch (Exception e) {}
			outStream.write((byte) s.charAt(i));
			outStream.flush();
		}
	}

	public void send(char c) throws Exception
	{
		outStream.write((byte) c);
		outStream.flush();
	}

	public void skipBytes(int numOfBytes) throws Exception
	{
		int count, c;

		count = 0;
		while (count < numOfBytes)
		{
			c = inStream.read();
			if (c != -1) count ++;
		}
	}

	public boolean dataAvailable() throws Exception
	{
		return (inStream.available() > 0 ? true : false);
	}

	public String getResponse() throws Exception
	{
		final int RETRIES = 3;
		final int WAIT_TO_RETRY = 1000;
		StringBuffer buffer;
		int c, retry;

		retry = 0;
		buffer = new StringBuffer(256);

		while (retry < RETRIES)
		{
			try
				{
					while (true)
					{
						c = inStream.read();
						if (c == -1)
						{
							buffer.delete(0, buffer.length());
							break;
						}
						buffer.append((char) c);

						if  ((buffer.toString().indexOf("OK\r") > -1) ||
							((buffer.toString().indexOf("ERROR") > -1) && (buffer.toString().lastIndexOf("\r") > buffer.toString().indexOf("ERROR")) ||
							((buffer.toString().indexOf("CPIN")  > -1) && (buffer.toString().indexOf("\r", buffer.toString().indexOf("CPIN")) > -1))))
							break;
					}
					retry = RETRIES;
				}
			catch (Exception e)
			{
				if (retry < RETRIES)
				{
					Thread.sleep(WAIT_TO_RETRY);
					retry ++;
				}
				else throw e;
			}
		}
		
		// Following line is to skip the remaining "\n" char...
		if (dataAvailable()) skipBytes(1);
		if(buffer.length()>0){
		while ((buffer.charAt(0) == 13) || (buffer.charAt(0) == 10)) buffer.delete(0, 1);
		}
		return buffer.toString();
	}
	
	
	
	
	
	public String waitResponse() throws Exception
	{
		final int RETRIES = 2;
		final int WAIT_TO_RETRY = 1000;
		StringBuffer buffer;
		int c, retry;

		retry = 0;
		buffer = new StringBuffer(256);

		while (retry < RETRIES)
		{
			try
				{
					while (true)
					{
						c = inStream.read();
						if (c == -1)
						{
							buffer.delete(0, buffer.length());
							break;
						}
						buffer.append((char) c);

						if  ((buffer.toString().indexOf("\r") > -1) ||
							((buffer.toString().indexOf("ERROR") > -1) && (buffer.toString().lastIndexOf("\r") > buffer.toString().indexOf("ERROR")) ||
							((buffer.toString().indexOf("CPIN")  > -1) && (buffer.toString().indexOf("\r", buffer.toString().indexOf("CPIN")) > -1))))
							break;
					}
					retry = RETRIES;
				}
			catch (Exception e)
			{
				if (retry < RETRIES)
				{
					Thread.sleep(WAIT_TO_RETRY);
					retry ++;
				}
				else throw e;
			}
		}
	
		// Following line is to skip the remaining "\n" char...
		if (dataAvailable()) skipBytes(1);
		//while ((buffer.charAt(0) == 13) || (buffer.charAt(0) == 10)) buffer.delete(0, 1);
		return buffer.toString();
	}
}