Code of SMS application

Servlet

import javax.comm.*;
import java.io.*;
import java.sql.Connection;
import java.util.Enumeration;
import java.util.Calendar;
import java.util.Date;
import java.util.TooManyListenersException;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import Student.NewBean;

public class SmSer extends HttpServlet {
Connection con;
boolean m1=true;
public void destroy() {
super.destroy();
}

private static final int DELAY_BETWEEN_CHARS = 20;

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

Student.NewBean bean=new Student.NewBean(con);
new Thread(bean).start();
//bean.getGot();
request.setAttribute("bean", bean);
RequestDispatcher rd=request.getRequestDispatcher("/Sms.jsp");
rd.forward(request,response);

}

public void init(ServletConfig config) throws ServletException {

try
{
ServletContext ctx=config.getServletContext();
con=(Connection)ctx.getAttribute("Connection");
if(con!=null)
{

}

}
catch(Exception e)
{
e.printStackTrace(); }
}
}

NewBean

package Student;

import javax.comm.*;
import java.io.*;
import java.sql.Connection;
import java.util.Enumeration;
import java.util.Calendar;
import java.util.Date;
import java.util.TooManyListenersException;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class NewBean extends HttpServlet implements Runnable, SerialPortEventListener {
SerialPort portID;
Enumeration portList;
InputStream incoming;
InputStream inputStream;
OutputStream outgoing;
Thread readThread;
CommPortIdentifier portIdentifier;
InputStream keyInput;
StringBuffer command = new StringBuffer(200);
int c;
Connection con;
boolean b1;
String h1;
private static final int DELAY_BETWEEN_CHARS = 20;
static CommPortIdentifier portId;
//static Enumeration portList;

//InputStream inputStream;
SerialPort serialPort;
//Thread readThread;

public NewBean(Connection con) {

this.con=con;

portList = CommPortIdentifier.getPortIdentifiers();

while ( portList.hasMoreElements()) {
portIdentifier = (CommPortIdentifier)portList.nextElement();
System.out.println(portIdentifier.toString());
System.out.println(portIdentifier.getName());
}

try {
portIdentifier = CommPortIdentifier.getPortIdentifier("COM1");
portID = (SerialPort)portIdentifier.open("Serial",10);

// here we can get the input & output stream of this serial port
// we can put the AT command into this stream
incoming = portID.getInputStream();
outgoing = portID.getOutputStream();
portID.addEventListener(this);
portID.notifyOnDataAvailable(true);
try {
portID.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
}catch(UnsupportedCommOperationException ucoe) {System.out.println("unsupported serial setting command");}

} catch( NoSuchPortException pe ) { System.out.println("No such port existing");
} catch(PortInUseException piue ) { System.out.println("Sorry, this port is in use now");
} catch(IOException ioe) {
System.out.println("maybe we can't get the input/output of serial port");
}catch(TooManyListenersException tmel) {}
}

private void sendStr(String s) throws Exception
{
for (int i = 0; i < s.length(); i ++)
{
try { Thread.sleep(DELAY_BETWEEN_CHARS); } catch (Exception e) {}
outgoing.write((byte) s.charAt(i));
outgoing.flush();
}
}
private void sendChar(char s) throws Exception
{
//for (int i = 0; i < s.length(); i ++)
//{
try { Thread.sleep(DELAY_BETWEEN_CHARS); } catch (Exception e) {}
outgoing.write((byte) s);
outgoing.flush();
//}
}

public void serialEvent(SerialPortEvent event) {
switch(event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
try {
readIncoming();
}catch(Exception ioe) {};
break;
} // end of switch(event.getEventType())
}

private void readIncoming() throws Exception {
int c;
StringBuffer sb = new StringBuffer(200);

try {
while (true ) {
c = incoming.read();
if ( c == -1 ) {
break;
}
sb.append((char)c);
}
while ( sb.charAt(0) == 13 || sb.charAt(0) == 10 ) sb.delete(0,1);
System.out.println("-------------- here is the input stream ---------");
System.out.println(sb.toString());
System.out.println("-------------- here is the input stream ---------");
} catch (IOException e) {
System.out.println("we can't read from input");
}

}
public void setGot(String h)
{
this.h1=h;

}
public String getGot()
{
return h1;

}

public void run() {
try {
if (true) {

sendStr("AT+CMGS=my number");
try{

serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
} catch (PortInUseException e) {}
inputStream = portID.getInputStream();
System.out.println(inputStream);
if(inputStream.equals("<CR><LF>"))
{
System.out.println("here in cr lf");
}
//sendStr(+CMGS=9397624332");
sendChar((char)0x0d);
Thread.sleep(1000);
sendStr("This Test SMS is sent from CBLOOMS Infotech Services(SMS application) ");
Thread.sleep(10);
sendChar((char)0x1a);
setGot("Message sent Successfully");

/*while( true ) {
c = System.in.read();
if ( c == 0x0d || c == 0x0a ) {
break;
}
command.append((char)c);
}*/

//if ( command.toString().equalsIgnoreCase("quit") )
//break;

//System.out.println("try to send "+command.toString());

//command.delete(0,command.length());

}

}catch(Exception e) {

setGot("Message unsent Successfully");
System.out.println("we failed at SENDing stage");

}

portID.close();
System.out.println("port has been closed");
}

}

I am unable get response from modem when it off(power off)..How to check it
& i am unable to forward to jsp
In jsp it should print Message sent successfully ,and i need to get acknowledgement.