关于java串口通信的问题

[cxxlp]

java 发送数据,另一端,有时会正常接收到 有时只会接收前8个字符,,经常数据接收不完整,请问这是怎么回事啊

[紫炎圣骑]

贴一下你的代码看看

[cxxlp]

 发送数据

	public void WritePortData(byte [] aa){
		
		try{
			
			outputStream = serialPort.getOutputStream(); 
			outputStream.write(aa);
			outputStream.flush();

		}catch(Exception ee){
			
			
			return ;
			
		}
		
		
	}
	

串口连接:

public void connectPort() {
	
	
		
		if (this.serialPort != null) {
			this.serialPort.close();
		}
		try {
			portId = CommPortIdentifier.getPortIdentifier(this.portName);
			serialPort = (SerialPort) portId.open("ReadComm", 2000);
			this.p3f2.setText(this.portName + " Success\n");

		} catch (Exception ee) {

			JOptionPane.showMessageDialog(this, ee.toString(), "Message",
					JOptionPane.INFORMATION_MESSAGE);
			this.p3f2.setText(this.portName + " failure\n");
		}
		try {
			serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
					SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);

		} catch (Exception ee) {

			JOptionPane.showMessageDialog(this,
					"Please connect serial port first!", "Message",
					JOptionPane.INFORMATION_MESSAGE);
		}
		try {

			this.inputStream = serialPort.getInputStream();
			this.serialPort.addEventListener(this);

		} catch (Exception ee) {}
		serialPort.notifyOnDataAvailable(true);
	}

接收数据代码:

public void serialEvent(SerialPortEvent event) {

		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[21];  			     
             try{                      
           	  while(inputStream.available()>0){           		  
                     int numBytes=inputStream.read(readBuffer);                                
           	  }           	  
           	
           	  String comStr = new String(readBuffer).trim();

           	       	  
           	  
           	  }
			} catch (Exception e) {	}
			break;
		}
	}

[三仙半]

你检查下你发送的字符中是否有控制代码，如果存在，数据会被切断。