springboot 串口通讯

可以使用Java的RXTX库来实现Spring Boot与串口通讯。首先需要在pom.xml文件中添加RXTX依赖：

<dependency>
    <groupId>org.rxtx</groupId>
    <artifactId>rxtx</artifactId>
    <version>2.2</version>
</dependency>

然后在代码中使用SerialPort类来打开串口、读取数据和发送数据。以下是一个简单的示例：

import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

@Component
public class SerialPortService {

    private static final String PORT_NAME = "/dev/ttyUSB0"; // 串口名称
    private static final int BAUD_RATE = 9600; // 波特率

    private SerialPort serialPort;

    @PostConstruct
    public void init() throws Exception {
        CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(PORT_NAME);
        if (portIdentifier.isCurrentlyOwned()) {
            throw new Exception("Port is currently in use");
        } else {
            serialPort = (SerialPort) portIdentifier.open(this.getClass().getName(), 2000);
            serialPort.setSerialPortParams(BAUD_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
        }
    }

    public void sendData(byte[] data) throws IOException {
        OutputStream outputStream = serialPort.getOutputStream();
        outputStream.write(data);
        outputStream.flush();
    }

    public byte[] readData() throws IOException {
        InputStream inputStream = serialPort.getInputStream();
        byte[] buffer = new byte[1024];
        int len = inputStream.read(buffer);
        byte[] data = new byte[len];
        System.arraycopy(buffer, 0, data, 0, len);
        return data;
    }

}