在此代码完美运行之前的一周，但在格式化系统之后，在尝试通过usb发送短信连接我的诺基亚c3手机时会发出NoSuchPortException
错误日志为
enter code here`INFO: Server startup in 17344 ms
+919032055002 null
problem is here in getting port number
javax.comm.NoSuchPortException
Port id is : null
at javax.comm.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:105)
at com.gces.sms.SerialConnection.openConnection(SerialConnection.java:73)
at com.gces.sms.Sender.send(Sender.java:68)
at com.gces.sms.SMSClient.run(SMSClient.java:38)
at java.lang.Thread.run(Unknown Source)
in sms client & msg is : null
java.lang.NullPointerException
at com.gces.sms.SerialConnection.openConnection(SerialConnection.java:90)
at com.gces.sms.Sender.send(Sender.java:68)
at com.gces.sms.SMSClient.run(SMSClient.java:38)
at java.lang.Thread.run(Unknown Source)
并且代码在这里
package com.gces.sms;
import javax.comm.*;
import java.io.*;
import java.awt.TextArea;
import java.awt.event.*;
import java.util.TooManyListenersException;
public class SerialConnection implements SerialPortEventListener,
CommPortOwnershipListener {
private SerialParameters parameters;
private OutputStream os;
private InputStream is;
private KeyHandler keyHandler;
private CommPortIdentifier portId;
private SerialPort sPort;
private boolean open;
private String receptionString="";
public String getIncommingString(){
byte[] bVal= receptionString.getBytes();
receptionString="";
return new String (bVal);
}
public SerialConnection(SerialParameters parameters) {
this.parameters = parameters;
open = false;
}
public void openConnection() throws SerialConnectionException {
try {
portId = CommPortIdentifier.getPortIdentifier(parameters.getPortName());
} catch (NoSuchPortException e) {
System.out.println("problem is here in getting port number");
e.printStackTrace();
}catch(Exception e)
{
e.printStackTrace();
}
System.out.println("Port id is : "+portId);
try {
sPort = (SerialPort)portId.open("SMSConnector", 30000);
} catch (PortInUseException e) {
throw new SerialConnectionException(e.getMessage());
}
sPort.sendBreak(1000);
try {
setConnectionParameters();
} catch (SerialConnectionException e) {
sPort.close();
throw e;
}
try {
os = sPort.getOutputStream();
is = sPort.getInputStream();
} catch (IOException e) {
sPort.close();
throw new SerialConnectionException("Error opening i/o streams");
}
try {
sPort.addEventListener(this);
} catch (TooManyListenersException e) {
sPort.close();
throw new SerialConnectionException("too many listeners added");
}
sPort.notifyOnDataAvailable(true);
try {
sPort.enableReceiveTimeout(30);
} catch (UnsupportedCommOperationException e) {
}
portId.addPortOwnershipListener(this);
open = true;
}
public void setConnectionParameters() throws SerialConnectionException {
int oldBaudRate = sPort.getBaudRate();
int oldDatabits = sPort.getDataBits();
int oldStopbits = sPort.getStopBits();
int oldParity = sPort.getParity();
int oldFlowControl = sPort.getFlowControlMode();
try {
sPort.setSerialPortParams(parameters.getBaudRate(),
parameters.getDatabits(),
parameters.getStopbits(),
parameters.getParity());
} catch (UnsupportedCommOperationException e) {
parameters.setBaudRate(oldBaudRate);
parameters.setDatabits(oldDatabits);
parameters.setStopbits(oldStopbits);
parameters.setParity(oldParity);
throw new SerialConnectionException("Unsupported parameter");
}
try {
sPort.setFlowControlMode(parameters.getFlowControlIn()
| parameters.getFlowControlOut());
} catch (UnsupportedCommOperationException e) {
throw new SerialConnectionException("Unsupported flow control");
}
}
public void closeConnection() {
if (!open) {
return;
}
if (sPort != null) {
try {
os.close();
is.close();
} catch (IOException e) {
System.err.println(e);
}
sPort.close();
portId.removePortOwnershipListener(this);
}
open = false;
}
public void sendBreak() {
sPort.sendBreak(1000);
}
public boolean isOpen() {
return open;
}
public void serialEvent(SerialPortEvent e) {
StringBuffer inputBuffer = new StringBuffer();
int newData = 0;
switch (e.getEventType()) {
case SerialPortEvent.DATA_AVAILABLE:
while (newData != -1) {
try {
newData = is.read();
if (newData == -1) {
break;
}
if ('\r' == (char)newData) {
inputBuffer.append('\n');
} else {
inputBuffer.append((char)newData);
}
} catch (IOException ex) {
System.err.println(ex);
return;
}
}
receptionString=receptionString+ (new String(inputBuffer));
break;
case SerialPortEvent.BI:
receptionString=receptionString+("\n--- BREAK RECEIVED ---\n");
}
}
public void ownershipChange(int type) {
/*
if (type == CommPortOwnershipListener.PORT_OWNERSHIP_REQUESTED) {
PortRequestedDialog prd = new PortRequestedDialog(parent);
}
*/
}
class KeyHandler extends KeyAdapter {
OutputStream os;
/**
Creates the KeyHandler.
@param os The OutputStream for the port.
*/
public KeyHandler(OutputStream os) {
super();
this.os = os;
}
/**
Handles the KeyEvent.
Gets the <code>char</char> generated by the <code>KeyEvent</code>,
converts it to an <code>int</code>, writes it to the <code>
OutputStream</code> for the port.
*/
public void keyTyped(KeyEvent evt) {
char newCharacter = evt.getKeyChar();
if ((int)newCharacter==10) newCharacter = '\r';
System.out.println ((int)newCharacter);
try {
os.write((int)newCharacter);
} catch (IOException e) {
System.err.println("OutputStream write error: " + e);
}
}
}
public void send(String message) {
byte[] theBytes= (message+"\n").getBytes();
for (int i=0; i<theBytes.length;i++){
char newCharacter = (char)theBytes[i];
if ((int)newCharacter==10) newCharacter = '\r';
try {
os.write((int)newCharacter);
} catch (IOException e) {
System.err.println("OutputStream write error: " + e);
}
}
//System.out.println (">'" +message +"' sent");
}
}
，第二个文件代码为
package com.gces.sms;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Date;
import com.gces.sms.SerialConnection;
import com.gces.sms.SerialConnectionException;
import com.gces.sms.SerialParameters;
public class Sender implements Runnable {
private static final long STANDARD=500;
private static final long LONG=2000;
private static final long VERYLONG=20000;
SerialConnection mySerial =null;
static final private char cntrlZ=(char)26;
String in, out;
Thread aThread=null;
private long delay=STANDARD;
String recipient=null;
String message=null;
//private String csca="+919084051550"; // the message center uninor
//private String csca="+919837099995"; // the message center idea
private String csca="+919032055002"; // the message center docomo
private SerialParameters defaultParameters= new SerialParameters ("COM4",9600,0,0,8,1,0);
public int step;
public int status=-1;
public long messageNo=-1;
public Sender(String recipient, String message){
this.recipient=recipient;
this.message=message;
}
public int send () throws Exception {
File file = new File("C:\\db_backup\\SMS.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line = null;
String port = null;
int flag=0;
while( (line = br.readLine())!= null ){
if(flag==0)
port=line;
else if(flag==1)
csca=line;
else
br.close();
flag++;
}
//br.close();
defaultParameters= new SerialParameters (port,9600,0,0,8,1,0);
SerialParameters params = defaultParameters;
System.out.println(csca+" "+port);
mySerial =new SerialConnection (params);
mySerial.openConnection();
aThread=new Thread(this);
aThread.start() ;
//log("start");
return 0;
}
public void run(){
boolean timeOut=false;
long startTime=(new Date()).getTime();
while ((step <7) && (!timeOut)){
timeOut=((new Date()).getTime() - startTime)>delay;
//if atz does not work, type to send cntrlZ and retry, in case a message was stuck
if (timeOut && (step==1)) {
step=-1;
mySerial.send( ""+cntrlZ);
}
//read incoming string
String result= mySerial.getIncommingString() ;
//System.out.println("<- in rrrrrrrrrr "+result+"\n--------");
int expectedResult=-1;
try{
//log ("Step:"+step);
switch (step){
case 0:
mySerial.send("atz");
delay=LONG;
startTime=(new Date()).getTime();
break;
case 1:
delay=STANDARD;
mySerial.send("ath0");
startTime=(new Date()).getTime();
break;
case 2:
expectedResult=result.indexOf("OK");
//log ("received ok ="+expectedResult);
if (expectedResult>-1){
mySerial.send("at+cmgf=1");
startTime=(new Date()).getTime();
}else{
step=step-1;
}
break;
case 3:
expectedResult=result.indexOf("OK");
// log ("received ok ="+expectedResult);
if (expectedResult>-1){
mySerial.send("at+csca=\""+csca+"\"");
startTime=(new Date()).getTime();
}else{
step=step-1;
}
break;
case 4:
expectedResult=result.indexOf("OK");
// log ("received ok ="+expectedResult);
if (expectedResult>-1){
mySerial.send("at+cmgs=\""+recipient+"\"");
startTime=(new Date()).getTime();
}else{
step=step-1;
}
break;
case 5:
expectedResult=result.indexOf(">");
//log ("received ok ="+expectedResult);
if (expectedResult>-1){
mySerial.send(message+cntrlZ);
startTime=(new Date()).getTime();
}else{
step=step-1;
}
delay=VERYLONG;//waiting for message ack
break;
case 6:
expectedResult=result.indexOf("OK");
//read message number
if (expectedResult>-1){
int n=result.indexOf("CMGS:");
result=result.substring(n+5);
//System.out.println(result);
n=result.indexOf("\n");
status=0;
// result="1 11";
try{
messageNo=Long.parseLong(result.substring(0,n).trim() );
}
catch(NumberFormatException e){
//result="1 ";
messageNo=1;
}
log ("sent message no:"+messageNo);
}else{
step=step-1;
}
break;
}
step=step+1;
aThread.sleep(100);
}catch (Exception e){
e.printStackTrace();
}
}
mySerial.closeConnection() ;
//if timed out set status
if (timeOut ) {
status=-2;
log("*** time out at step "+step+"***");
}
}
private void log(String s){
System.out.println (new java.util.Date()+":"+this.getClass().getName()+":"+s);
}
}
此代码工作正常，但在格式化系统后会出现这些错误......