java串口通信
java串口通信,由于没有相应的串口硬件,选了一款windows串口虚拟机机器
1. 准备
串口模拟器
Launch Virtual Serial Port Driver 下载地址
模拟两对四个串口,COM1发送数据给COM2,COM3发送数据给COM4
java包
<dependency>
<groupId>com.fazecast</groupId>
<artifactId>jSerialComm</artifactId>
<version>[2.0.0,3.0.0)</version>
</dependency>
2. java源代码
mport com.fazecast.jSerialComm.SerialPort;
import com.fazecast.jSerialComm.SerialPortDataListener;
import com.fazecast.jSerialComm.SerialPortEvent;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @Classname ComTest
* @Description com串口通信
* @Date 2021/9/4 10:44
* @Created by huangsm
*/
public class ComTest {
/**
* <com名称,SerialPort>串口通信map,存储串口名称与串口信息
*/
private Map<String, SerialPort> comMap = new HashMap<>();
/**
* com口列表
*/
private List<String> comList = new ArrayList<>();
public ComTest() {
//将所有的串口信息放入comlist,comMap中
SerialPort[] commPorts = SerialPort.getCommPorts();
for (SerialPort commPort : commPorts) {
comList.add(commPort.getSystemPortName());
comMap.put(commPort.getSystemPortName(), commPort);
//监听所有串口通信的数据
commPort.openPort();
commPort.addDataListener(new SerialPortDataListener() {
@Override
public int getListeningEvents() {
return SerialPort.LISTENING_EVENT_DATA_RECEIVED;
}
@Override
public void serialEvent(SerialPortEvent serialPortEvent) {
byte[] newData = serialPortEvent.getReceivedData();
System.err.println(String.format("串口%s接收到数据大小:%s,串口数据内容:%s"
,serialPortEvent.getSerialPort().getSystemPortName(),newData.length,new String(newData)));
}
});
}
}
public static void main(String[] args) throws Exception {
ComTest comTest = new ComTest();
List<String> comList = comTest.comList;
Map<String, SerialPort> comMap = comTest.comMap;
BufferedReader systemIn = new BufferedReader(new InputStreamReader(System.in));
while (true) {
System.out.println("你的可以通信的串口列表");
for (String comName : comList) {
System.out.println("========" + comName + "========");
}
System.out.println("请输入你的串口:");
String com = systemIn.readLine();
if(!comList.contains(com)){
System.out.println("输入的串口不正确:");
continue;
}
System.out.println("输入你要发送的消息:");
String msg = systemIn.readLine();
SerialPort serialPort = comMap.get(com);
serialPort.writeBytes(msg.getBytes(),msg.getBytes().length);
//这里是让串口先接收到数据再重新发送数据
Thread.sleep(1000);
}
}
}
3. 运行结果
你的可以通信的串口列表
========COM1========
========COM2========
========COM3========
========COM4========
请输入你的串口:
COM3
输入你要发送的消息:
137912037
串口COM4接收到数据大小:9,串口数据内容:137912037
你的可以通信的串口列表
========COM1========
========COM2========
========COM3========
========COM4========
请输入你的串口: