java read com port

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</pre>java 读取串口的技术<p></p><p>       1、rxtx  </p><p>   http://rxtx.qbang.org/wiki/index.php/Download</p><pre code_snippet_id="1674392" snippet_file_name="blog_20160506_2_2194645" name="code" class="java">package fpx.grs.aliexpress.com;import java.io.IOException;import java.io.InputStream;import java.util.Enumeration;import java.util.TooManyListenersException;import gnu.io.CommPortIdentifier;import gnu.io.PortInUseException;import gnu.io.SerialPort;import gnu.io.SerialPortEvent;import gnu.io.SerialPortEventListener;import gnu.io.UnsupportedCommOperationException;public class SimpleRead implements Runnable, SerialPortEventListener {    static CommPortIdentifier portId;    static Enumeration portList;    InputStream inputStream;    SerialPort serialPort;    Thread readThread;    public static void main(String[] args) {        portList = CommPortIdentifier.getPortIdentifiers();        while (portList.hasMoreElements()) {            portId = (CommPortIdentifier) portList.nextElement();            if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {                 if (portId.getName().equals("COM4")) {            //                if (portId.getName().equals("/dev/term/a")) {                    SimpleRead reader = new SimpleRead();                }            }        }    }    public SimpleRead() {        try {            serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);        } catch (PortInUseException e) {System.out.println(e);}        try {            inputStream = serialPort.getInputStream();        } catch (IOException e) {System.out.println(e);}    try {            serialPort.addEventListener(this);    } catch (TooManyListenersException e) {System.out.println(e);}        serialPort.notifyOnDataAvailable(true);        try {            serialPort.setSerialPortParams(9600,                SerialPort.DATABITS_8,                SerialPort.STOPBITS_1,                SerialPort.PARITY_NONE);        } catch (UnsupportedCommOperationException e) {System.out.println(e);}        readThread = new Thread(this);        readThread.start();    }    public void run() {        try {            Thread.sleep(20000);        } catch (InterruptedException e) {System.out.println(e);}    }    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:            byte[] readBuffer = new byte[20];            try {                while (inputStream.available() > 0) {                    int numBytes = inputStream.read(readBuffer);                }                System.out.print(new String(readBuffer));            } catch (IOException e) {System.out.println(e);}            break;        }    }}

2、jSerialComm

在rxtx基础上不需要增加系统的dll

https://github.com/Fazecast/jSerialComm/wiki

3、jssc

google的不需要依赖系统的dll

https://code.google.com/archive/p/java-simple-serial-connector/downloads

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