Java串口操作RXTX.doc

Java串口操作RXTXRXTX是个提供串口和并口通信的开源Java类库。该项目提供了Windows，Linux，Mac os X，Solaris操作系统下的兼容m串口通讯包API的实现。一、 使用准备1.Windows将rxtxParallel.dll、rxtxSerial.dll拷贝到%JAVA_HOME%安装目录bin目录下将RXTXcomm.jar 拷贝到%JAVA_HOME%jrelibextRXTXcomm.jar2.Linux复制librxtxSerial.so,librxtxParallel.so到%JAVA_HOME%/lib/$(ARCH)/复制RXTXcomm.jar到%JAVA_HOME%/ext定义驱动类后将perties放在应用程式的根目录下二、 操作类注：串口操作类一定要继承SerialPortEventListenerpublic class SerialPortUtilityNew implements SerialPortEventListener / 检测系统中可用的通讯端口类private CommPortIdentifier portId;/ Enumeration 为枚举型类,在util中private Enumeration portList;/ 输入输出流private InputStream inputStream;private OutputStream outputStream;/ RS-232的串行口private SerialPort serialPort;public static String test = ;/保存串口返回信息private static SerialPortUtilityNew uniqueInstance;/单例创建/初始化串口public void init() / 获取系统中所有的通讯端口portList = CommPortIdentifier.getPortIdentifiers();/ 用循环结构找出串口while (portList.hasMoreElements() / 强制转换为通讯端口类型portId = (CommPortIdentifier) portList.nextElement();/ 判断是否为串口if (portId.getPortType() = CommPortIdentifier.PORT_SERIAL)/比较串口名称是否为“COM3”if (portId.getName().equals(COM3) System.out.println(找到COM3);/ 打开串口try / open:（应用程序名【随意命名】，阻塞时等待的毫秒数）serialPort = (SerialPort) portId.open(GSMModemTest2.0, 2000);/ 设置串口监听serialPort.addEventListener(new SerialPortUtilityNew();/ 设置可监听serialPort.notifyOnDataAvailable(true);/* 设置串口通讯参数 */ 波特率，数据位，停止位和校验方式/ 波特率2400,偶校验serialPort.setSerialPortParams(9600,SerialPort.DATABITS_8, SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);test = ;outputStream = serialPort.getOutputStream(); catch (PortInUseException e) e.printStackTrace(); catch (TooManyListenersException e) e.printStackTrace(); catch (UnsupportedCommOperationException e) e.printStackTrace(); catch (IOException e) e.printStackTrace();/* * 实现接口SerialPortEventListener中的方法 读取从串口中接收的数据 */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:/获取到串口返回信息readComm();break;default:break;/读取串口返回信息public void readComm() byte readBuffer = new byte1024;try inputStream = uniqueInstance.serialPort.getInputStream();/ 从线路上读取数据流int len = 0;while (len = inputStream.read(readBuffer) != -1) System.out.println(实时反馈：+new String(readBuffer, 0, len).trim()+new Date();test += new String(readBuffer, 0, len).trim();break; catch (IOException e) e.printStackTrace();/* * 关闭串口 */public static void closeSerialPort() uniqueInstance.serialPort.close();/向串口发送信息方法private void sendMsg()String information = ATr;/要发送的内容try outputStream.writ