jssc库实现读取485串口数据

1.添加依赖

点击查看代码

   <dependency>
            <groupId>org.scream3r</groupId>
            <artifactId>jssc</artifactId>
            <version>2.8.0</version>
        </dependency>

2.创建工具类

点击查看代码

package com.pangus.ims.custom.client.lannRay.util;

import jssc.SerialPort;
import jssc.SerialPortException;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
 * @program: ims-custom-client-lannray
 * @description: JSSC 库的串口工具类
 * @author: 王帅令
 * @create: 2024-10-16 09:20
 **/

public class SerialPortJSSCUtil {

    private boolean isEventListenerAdded = false;
    public SerialPort serialPort;

    public  SerialPortJSSCUtil(String portName) {
        serialPort = new SerialPort(portName);
    }

    public void openPort(int baudRate, int dataBits, int stopBits, int parity) throws SerialPortException {

        serialPort.openPort();
        serialPort.setParams(baudRate, dataBits, stopBits, parity);

    }

    public void closePort() throws SerialPortException {

        if (serialPort.isOpened()) {
            serialPort.closePort();
        }

    }

    public void writeData(String data) throws SerialPortException {
        serialPort.writeBytes(data.getBytes());
    }

    public void setSerialPortEventListener(SerialPortEventListener listener) throws SerialPortException {
        if (!isEventListenerAdded) {
            serialPort.addEventListener(listener);
            isEventListenerAdded = true;
        }
    }
    public boolean isPortOpened() {
        return serialPort.isOpened();
    }

    public static void main(String[] args) {
        SerialPortJSSCUtil serialUtil = new SerialPortJSSCUtil("COM1");

        try {
            serialUtil.openPort(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);

            serialUtil.setSerialPortEventListener(new SerialPortEventListener() {
                @Override
                public void serialEvent(SerialPortEvent event) {
                    if (event.isRXCHAR()) {
                        try {
                            byte[] buffer = serialUtil.serialPort.readBytes(event.getEventValue());
                            System.out.println(new String(buffer));
                        } catch (SerialPortException ex) {
                            ex.printStackTrace();
                        }
                    }
                }
            });

            System.out.println("Serial port opened and listening...");

            // Example of writing data to the serial port
            //serialUtil.writeData("Hello, Serial Port!");

        } catch (SerialPortException ex) {
            ex.printStackTrace();
        } finally {
            try {
                serialUtil.closePort();
            } catch (SerialPortException ex) {
                ex.printStackTrace();
            }
        }
    }
}

3.使用工具类

点击查看代码

/**
     * 读取出口数据数据
     *
     **/
    public void readSerialData() throws IOException {
        try {
            if (!serialPortJSSCUtil.isPortOpened()){
                serialPortJSSCUtil.openPort(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
            }
            serialPortJSSCUtil.setSerialPortEventListener(new SerialPortEventListener() {
                @Override
                public void serialEvent(SerialPortEvent event) {
                    if (event.isRXCHAR()) {
                        try {
                            byte[] buffer = serialPortJSSCUtil.serialPort.readBytes(event.getEventValue());
                            System.out.println(new String(buffer));
                            String RecvStr=new String(buffer);
                          if(!StringUtils.isEmpty(RecvStr)) {
                              ContentBody body=new ContentBody();
                              LinkedHashMap<String, Object> recvData = new LinkedHashMap<>();
                              recvData.put("RecvData",RecvStr);
                              body.setExtendData(recvData);
                              //构建iotBaseMessage
                              final ContentMessage<ContentBody> message = new ContentMessage<>();
                              message.setBody(body);
                              message.setDeviceType(getDeviceType());
                              //发送数据到上层系统
                              sendMessage(message);
                          }
                        } catch (SerialPortException ex) {
                            ex.printStackTrace();
                        }
                    }
                }
            });

        } catch (SerialPortException ex) {
            ex.printStackTrace();
        }
    }

5.将读取方法放入到线程中

点击查看代码

@Override
    public void doWork() {
        try {
            //读串口数据
            readSerialData();
            //加延时
          //  TimeUnit.MINUTES.sleep(10); // 延时10分钟
        } catch (final RemoteNetWorkException ex) {
            throw new DriverException(ex.getMessage(), ex);
        } catch (final DriverException ex) {
            //驱动解析异常，需要人工干预的，直接抛出异常
            throw ex;
        } catch (final Exception ex) {
            //其他异常，例如数据上传到MES，MES返回提示标签不存在的业务类异常,这种也要删原始日志文件
            throw new DriverException(ex.getMessage(), ex);
        }
    }