来自 Com 端口的 Java readLine

Question

有什么方法可以改变这个 java 代码(从 com 端口读取)以读取行？
例如。

我正在使用 rxtx com

原始方法:

public void serialEvent(SerialPortEvent event) {
    switch (event.getEventType()) {
        case SerialPortEvent.DATA_AVAILABLE:
            byte[] readBuffer = new byte[10];
            int numBytes = 0;
            try {
                while (inputStream.available() > 0) {                       
                    numBytes = inputStream.read(readBuffer);
                }
            } catch (IOException e) {
                System.out.println(e);
            }
        System.out.println(Arrays.toString(readBuffer));
    }
}

Answer 1

假设 inputStream 是一个 InputStream，你可以用 InputStreamReader 包装它并用 BufferedReader 包裹起来(有一个 readLine() )。类似的东西，

case SerialPortEvent.DATA_AVAILABLE:
  String line;
  BufferedReader br = null;
  try {
    br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
    while ((line = br.readLine()) != null) {
      System.out.println(line);
    }
  } catch (IOException e) {
    e.printStackTrace();
  } finally {
    try {
      br.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

或者您可以使用 try-with-resouces ,

case SerialPortEvent.DATA_AVAILABLE:
  String line;
  BufferedReader br = null;
  try (br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));) {
    while ((line = br.readLine()) != null) {
      System.out.println(line);
    }
  } catch (IOException e) {
    e.printStackTrace();
  }