能不能写一个servlet读写本地串口的数据

[sshany]

thx

[qiuyilai]

SUN Java Communications API 2.0

[qiuyilai]

import java.io.*;
import java.util.*;
import javax.comm.*;

public class SimpleRead implements Runnable, SerialPortEventListener {
static CommPortIdentifier portId;
static Enumeration portList;

InputStream inputStream;
SerialPort serialPort;
Thread readThread;

public static void main(String[] args) {
portList = CommPortIdentifier.getPortIdentifiers();

while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM1")) {
// if (portId.getName().equals("/dev/term/a")) {
SimpleRead reader = new SimpleRead();
}
}
}
}

public SimpleRead() {
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
}
catch (PortInUseException e) {}

try {
inputStream = serialPort.getInputStream();
}
catch (IOException e) {}

try {
serialPort.addEventListener(this);
}
catch (TooManyListenersException e) {}

serialPort.notifyOnDataAvailable(true);
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
}
catch (UnsupportedCommOperationException e) {}

readThread = new Thread(this);
readThread.start();
}

public void run() {
try {
Thread.sleep(20000);
}
catch (InterruptedException e) {}
}

public void serialEvent(SerialPortEvent event) {
System.out.println("event.getEventType() : " + event.getEventType());
switch (event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
byte[] readBuffer = new byte[20];

try {
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
}
System.out.print(new String(readBuffer));
}
catch (IOException e) {}
break;
}
}
}

[wangyanqiu]

up

[Acylas]

我有一篇文章你可以看看，肯定可以实现到，不过比较长这里贴不了。
你看了可以结贴了。

[wenming168]

servlet运行在服务器端不可能读本地串口，要用签名的applet

[Grace_ghb]

能说详细点？