【JAVA】读取windows的串口信息

1. 首先去https://repo1.maven.org/maven2/下载rxtx的jar包，比如下载rxtx-2.1.7.jar放在项目的lib目录中
2. 去这里https://files-cdn.cnblogs.com/files/blogs/666773/rxtx-win-x64.rar下载RXTXcomm.jar（放在项目的lib中）、rxtxParallel.dll和rxtxSerial.dll（放在项目的根目录中）
3. 如下代码就是获取指定串口的数据

package sdf;import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;import java.io.IOException;
import java.io.InputStream;public class SerialPortReader implements SerialPortEventListener {private SerialPort serialPort;private InputStream inputStream;public static void main(String[] args) {SerialPortReader reader = new SerialPortReader();reader.connect("COM1");  // 修改为实际的串口名称reader.readData();}public void connect(String portName) {try {CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);if (portIdentifier.isCurrentlyOwned()) {System.out.println("Port is currently in use.");} else {//通过portIdentifier对象打开物理串口，"SerialPortReader"是给连接起的名称标识，2000表示打开端口的超时时间（单位：毫秒）serialPort = (SerialPort) portIdentifier.open("SerialPortReader", 2000);serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);inputStream = serialPort.getInputStream();serialPort.addEventListener(this);serialPort.notifyOnDataAvailable(true);}} catch (Exception e) {e.printStackTrace();}}public void readData() {try {while (true) {// 这里可以添加一些逻辑来处理读取到的数据Thread.sleep(1000);}} catch (InterruptedException e) {e.printStackTrace();}}@Overridepublic void serialEvent(SerialPortEvent event) {if (event.getEventType() == SerialPortEvent.DATA_AVAILABLE) {try {byte[] buffer = new byte[inputStream.available()];inputStream.read(buffer);String data = new String(buffer);System.out.println("Received data: " + data);} catch (IOException e) {e.printStackTrace();}}}
}

4. 获取所有端口代码

import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import java.util.Enumeration;public class SerialPortReader {public static void main(String[] args) {// 列出所有可用串口Enumeration portList = CommPortIdentifier.getPortIdentifiers();while (portList.hasMoreElements()) {CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement();if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {System.out.println(portId.getName());}}// 打开指定串口String portName = "COM1";  // 修改为实际的串口名称try {CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);if (portIdentifier.isCurrentlyOwned()) {System.out.println("Port is currently in use.");} else {// 打开串口，参数分别为应用程序名称、超时时间SerialPort serialPort = (SerialPort) portIdentifier.open("SerialPortReader", 2000);// 设置串口参数，波特率、数据位、停止位、奇偶校验serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);}} catch (Exception e) {e.printStackTrace();}}
}