java串口通信以及示例代码！可以运行！

import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Enumeration; import java.util.StringTokenizer; import java.util.TooManyListenersException; import javax.comm.CommPortIdentifier; import javax.comm.PortInUseException; import javax.comm.SerialPort; import javax.comm.SerialPortEvent; import javax.comm.SerialPortEventListener; import javax.comm.UnsupportedCommOperationException; /* * Created on 2005-4-18 10:36:39 * */ /** * @author zxub * */ public class CommConnection implements SerialPortEventListener { private Enumeration portList; private String portName; private CommPortIdentifier portId;//串口管理器,负责打开,调用,和初始化串口等管理工作 private SerialPort serialPort=null; private int getReplyInterval; private int commandDelay; private String replyString; private InputStream inputStream=null; private OutputStream outputStream=null; private int Baudrate; private String sendMode; private String message; private int msgCount = 0; public boolean errFlag = false; public CommConnection() { getSysConfig(); } public void getSysConfig() { OperaXML ox = new OperaXML(); ox.read("config.xml"); this.portName = ox.getNodeValue("Config1/PortName"); this.Baudrate = Integer.parseInt(ox.getNodeValue("Config1/BAUDRATE")); this.sendMode = ox.getNodeValue("Config1/SendMode"); this.getReplyInterval = Integer.parseInt(ox .getNodeValue("Config1/GetReplyInterval")); this.commandDelay = Integer.parseInt(ox .getNodeValue("Config1/CommandDelay")); ox.close(); } //******************************************************************** //列出所有串口 public void listSerialPort() { // CommPortIdentifier类的getPortIdentifiers方法可以找到系统所有的串口， //每个串口对应一个CommPortIdentifier类的实例。 portList=null; portId=null; portList = CommPortIdentifier.getPortIdentifiers(); returnStateInfo("串口列表："); while (portList.hasMoreElements()) { portId = (CommPortIdentifier) portList.nextElement(); /* 如果端口类型是串口，则打印出其端口信息 */ if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) { returnStateInfo(portId.getName()); } } returnStateInfo("串口列表显示结束！"); } //******************************************************************** //******************************************************************** public void getSerialPort() { if (this.errFlag == true) return; returnStateInfo("检查连接情况..."); if (this.portName == "") { returnStateInfo("串口号为空，请检查配置文件！"); this.errFlag = true; return; //System.out.println("Portname is null, get err, the program now // exit!"); //System.exit(0); } portList = CommPortIdentifier.getPortIdentifiers(); while (portList.hasMoreElements()) { portId = (CommPortIdentifier) portList.nextElement(); if ((portId.getPortType() == CommPortIdentifier.PORT_SERIAL) && portId.getName().equalsIgnoreCase(this.portName)) { try { this.serialPort = (SerialPort) portId.open("SendSms", 2000); } catch (PortInUseException e) { returnStateInfo("获取" + this.portName + "时出错！原因：" + e.getMessage()); this.errFlag = true; return; } } } } public void listenSerialPort() { if (this.errFlag == true) return; if (this.serialPort == null) { returnStateInfo("不存在" + this.portName + "，请检查相关配置！"); this.errFlag = true; return; } //设置输入输出流 try { outputStream = (OutputStream) this.serialPort.getOutputStream(); inputStream = (InputStream) this.serialPort.getInputStream(); } catch (IOException e) { returnStateInfo(e.getMessage()); } try { //监听端口 this.serialPort.notifyOnDataAvailable(true); this.serialPort.notifyOnBreakInterrupt(true); this.serialPort.addEventListener(this); } catch (TooManyListenersException e) { this.serialPort.close(); returnStateInfo(e.getMessage()); } try { this.serialPort.enableReceiveTimeout(20); } catch (UnsupportedCommOperationException e) { } //设置端口的基本参数 try { this.serialPort.setSerialPortParams(this.Baudrate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); } catch (UnsupportedCommOperationException e) { } } //******************************************************************** //******************************************************************** //对串口的读写操作 public void writeToSerialPort(String msgString) { try { this.outputStream.write(msgString.getBytes()); //CTRL+Z=(char)26 } catch (IOException e) { System.out.println(e.getMessage()); } } private void waitForRead(int waitTime) { try { Thread.sleep(waitTime); } catch (Exception e) { System.out.println(e.getMessage()); } } public String readFromSerialPort(String messageString) { int strLength; String messageStr; String returnString; strLength = messageString.length(); messageStr = messageString.substring(strLength - 4, strLength - 2); if (messageStr.equals("OK")) { returnString = messageStr; } else { returnString = messageString; } messageStr = messageString.substring(strLength - 7, strLength - 2); if (messageStr.equals("ERROR")) { returnString = messageStr; } return returnString; } //******************************************************************** //******************************************************************** //操作结束，关闭所用资源 public void closeSerialPort() { if (this.serialPort != null) { try { this.serialPort.close(); } catch (RuntimeException e) { System.out.println(e.getMessage()); } } returnStateInfo("已断开连接！"); } public void closeIOStream() { if (this.inputStream!=null) { try { this.inputStream.close(); } catch (IOException e) { System.out.println(e.getMessage()); } } if (this.outputStream!=null) { try { this.outputStream.close(); } catch (IOException e1) { System.out.println(e1.getMessage()); } } //returnStateInfo("已关闭I/O流！"); } //******************************************************************** public void setToNull() { if (this.serialPort!=null) this.serialPort.close(); this.serialPort = null; this.inputStream=null; this.outputStream=null; } //******************************************************************** //监听事件 public void serialEvent(SerialPortEvent e) { StringBuffer inputBuffer = new StringBuffer(); int newData = 0; switch (e.getEventType()) { case SerialPortEvent.DATA_AVAILABLE ://DATA_AVAILABLE - 有数据到达 while (newData != -1) { try { newData = this.inputStream.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; } } this.message = this.message + new String(inputBuffer); break; case SerialPortEvent.BI ://BI - 通讯中断. System.out.println("\n--- BREAK RECEIVED ---\n"); } } //***************************************************************** //***************************************************************** //信息发送 public void sendmsg(String messageString, String phoneNumber) { boolean sendSucc = false; getSerialPort(); listenSerialPort(); checkConn(); if (this.errFlag == true) return; int msglength; String sendmessage, tempSendString; returnStateInfo("开始发送..."); switch (Integer.parseInt(this.sendMode)) { case 0 ://按PDU方式发送 { this.message = ""; writeToSerialPort("AT+CMGF=0\r");