网站复制来的一个关于JAVA二次源码开发包出现的问题文章，解决提示等问题的错误其中的一个可能的方法：
,javax.comm.PortInUseException: Port currently owned by org.smslib
org.smslib.TimeoutException: No response from device
前些天在弄短信设备时出现一种情况，即只能发送一条信息，再次发送时就报端口占用错误。我用的是官方提供的代码 如下：public void doIt() throws Exception
{
Service srv;
OutboundMessage msg;
OutboundNotification outboundNotification = new OutboundNotification();
System.out.println("Example: Send message from a serial gsm modem.");
System.out.println(Library.getLibraryDescription());
System.out.println("Version: " + Library.getLibraryVersion());
srv = new Service();
SerialModemGateway gateway = new SerialModemGateway("modem.com1", "COM1", 115200, "wavecom", "17254");//115200是波特率，一般为9600。可以通过超级终端测试出来
gateway.setInbound(true);
gateway.setOutbound(true);
gateway.setSimPin("0000");
gateway.setOutboundNotification(outboundNotification);
srv.addGateway(gateway);
srv.startService();
System.out.println("Modem Information:");
System.out.println(" Manufacturer: " + gateway.getManufacturer());
System.out.println(" Model: " + gateway.getModel());
System.out.println(" Serial No: " + gateway.getSerialNo());
System.out.println(" SIM IMSI: " + gateway.getImsi());
System.out.println(" Signal Level: " + gateway.getSignalLevel() + "%");
System.out.println(" Battery Level: " + gateway.getBatteryLevel() + "%");
System.out.println();
// Send a message synchronously.
msg = new OutboundMessage("13152195134", "这个是用java发的中文短信!");
msg.setEncoding(MessageEncodings.ENCUCS2);//这句话是发中文短信必须的
srv.sendMessage(msg);
System.out.println(msg);
System.out.println("Now Sleeping - Hit <enter> to terminate.");
System.in.read();
srv.stopService();
}
我的程序中把这个方法放到servlet中，每次点击页面按钮时调用这个方法。但第二次点击时就报端口被占用的错误。开始认为是端口没有关闭，但后面加上removeGateway(gateway)或gateway.stopGateway()都不行。
最后一想：短信设备接上电脑即建立了连接，执行srv.startService()相当于保持一个长连接，不能用程序断开！最后把srv设为静态属性，每次点击按钮只调用 srv.sendMessage(msg)方法，就实现连续发送短信了。
修改后代码如下：public void doIt() throws Exception
{
Service srv;
OutboundMessage msg;
OutboundNotification outboundNotification = new OutboundNotification();
System.out.println("Example: Send message from a serial gsm modem.");
System.out.println(Library.getLibraryDescription());
System.out.println("Version: " + Library.getLibraryVersion());
srv = new Service();
SerialModemGateway gateway = new SerialModemGateway("modem.com1", "COM1", 115200, "wavecom", "17254");//115200是波特率，一般为9600。可以通过超级终端测试出来
gateway.setInbound(true);
gateway.setOutbound(true);
gateway.setSimPin("0000");
gateway.setOutboundNotification(outboundNotification);
srv.addGateway(gateway);
srv.startService();
System.out.println("Modem Information:");
System.out.println(" Manufacturer: " + gateway.getManufacturer());
System.out.println(" Model: " + gateway.getModel());
System.out.println(" Serial No: " + gateway.getSerialNo());
System.out.println(" SIM IMSI: " + gateway.getImsi());
System.out.println(" Signal Level: " + gateway.getSignalLevel() + "%");
System.out.println(" Battery Level: " + gateway.getBatteryLevel() + "%");
System.out.println();
// Send a message synchronously.
msg = new OutboundMessage("13152195134", "这个是用java发的中文短信!");
msg.setEncoding(MessageEncodings.ENCUCS2);//这句话是发中文短信必须的
srv.sendMessage(msg);
System.out.println(msg);
System.out.println("Now Sleeping - Hit <enter> to terminate.");
System.in.read();
srv.stopService();
}
