在对串口进行编程操作的时候出现了以下问题，不知道怎么解决
```java
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000180004465, pid=13000, tid=0x0000000000001f5c
#
# JRE version: Java(TM) SE Runtime Environment (8.0_341-b10) (build 1.8.0_341-b10)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.341-b10 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [rxtxSerial.dll+0x4465]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\Wt\Desktop\UsartTools-master\hs_err_pid13000.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
希望有人能帮忙解决一下
给你找个串口通信的例子
串口通信通用工具类
public class SerialPortUtils {
private static Logger log = LoggerFactory.getLogger(SerialPortUtils.class);
/**
* 打卡串口
* @param portName 串口名
* @param baudRate 波特率
* @param dataBits 数据位
* @param stopBits 停止位
* @param parity 校验位
* @return 串口对象
*/
public static SerialPort open(String portName, Integer baudRate, Integer dataBits,
Integer stopBits, Integer parity) {
SerialPort result = null;
try {
// 通过端口名识别端口
CommPortIdentifier identifier = CommPortIdentifier.getPortIdentifier(portName);
// 打开端口，并给端口名字和一个timeout（打开操作的超时时间）
CommPort commPort = identifier.open(portName, 2000);
// 判断是不是串口
if (commPort instanceof SerialPort) {
result = (SerialPort) commPort;
// 设置一下串口的波特率等参数
result.setSerialPortParams(baudRate, dataBits, stopBits, parity);
log.info("打开串口{}成功", portName);
}else{
log.info("{}不是串口", portName);
}
} catch (Exception e) {
log.error("打开串口{}错误", portName, e);
}
return result;
}
/**
* 串口增加数据可用监听器
* @param serialPort
* @param listener
*/
public static void addListener(SerialPort serialPort, DataAvailableListener listener) {
if(serialPort == null){
return;
}
try {
// 给串口添加监听器
serialPort.addEventListener(new SerialPortListener(listener));
// 设置当有数据到达时唤醒监听接收线程
serialPort.notifyOnDataAvailable(Boolean.TRUE);
// 设置当通信中断时唤醒中断线程
serialPort.notifyOnBreakInterrupt(Boolean.TRUE);
} catch (TooManyListenersException e) {
log.error("串口{}增加数据可用监听器错误", serialPort.getName(), e);
}
}
/**
* 从串口读取数据
* @param serialPort
* @return
*/
public static byte[] read(SerialPort serialPort) {
byte[] result = {};
if(serialPort == null){
return result;
}
InputStream inputStream = null;
try {
inputStream = serialPort.getInputStream();
// 缓冲区大小为1个字节，可根据实际需求修改
byte[] readBuffer = new byte[1];
while (inputStream.available() > 0) {
inputStream.read(readBuffer);
result = ArrayUtil.addAll(result, readBuffer);
}
} catch (IOException e) {
log.error("串口{}读取数据错误", serialPort.getName(), e);
} finally {
IoUtil.close(inputStream);
}
return result;
}
/**
* 往串口发送数据
* @param serialPort
* @param data
*/
public static void write(SerialPort serialPort, byte[] data) {
if(serialPort == null){
return;
}
OutputStream outputStream = null;
try {
outputStream = serialPort.getOutputStream();
outputStream.write(data);
outputStream.flush();
} catch (Exception e) {
log.error("串口{}发送数据错误", serialPort.getName(), e);
} finally {
IoUtil.close(outputStream);
}
}
/**
* 关闭串口
* @param serialPort
*/
public static void close(SerialPort serialPort) {
if (serialPort != null) {
serialPort.close();
log.warn("串口{}关闭", serialPort.getName());
}
}
/**
* 查询可用端口
* @return 串口名List
*/
public static List<String> listPortName() {
List<String> result = new ArrayList<>();
// 获得当前所有可用端口
Enumeration<CommPortIdentifier> serialPorts = CommPortIdentifier.getPortIdentifiers();
if(serialPorts == null){
return result;
}
// 将可用端口名添加到List并返回该List
while (serialPorts.hasMoreElements()) {
result.add(serialPorts.nextElement().getName());
}
return result;
}
}
测试demo
public class SerialPortTest {
public static void main(String[] args) throws Exception{
// 打开串口
SerialPort serialPort = SerialPortUtils.open("COM1", 9600, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
// 监听串口读取数据
SerialPortUtils.addListener(serialPort, () -> {
byte[] data = SerialPortUtils.read(serialPort);
System.out.println(HexUtil.encodeHexStr(data));
});
// 往串口发送数据
byte[] data = {1, 2, 3};
SerialPortUtils.write(serialPort, data);
/*// 关闭串口
Thread.sleep(2000);
SerialPortUtils.close(serialPort);*/
// 测试可用端口
//SerialPortUtils.listPortName().forEach(o -> System.out.println(o));
}
}
core dump，程序崩溃了
收发数据或解析异常了吧，具体操作可参考
Java实现串口通信_我不吃芹菜的博客-CSDN博客_java 串口
降低一下JDK版本