串口如何发送和接受数据 Java
时间: 2024-09-19 10:12:55 浏览: 26
串口通信在Java中通常通过`java.io`包下的`SerialPort`类以及`javax.comm`包来处理,这是Java平台提供的一种标准API。以下是发送和接收数据的基本步骤:
**发送数据**:
1. **初始化串口**:
```java
SerialPort serial = new SerialPort("COM1"); // 假设你的串口号是COM1
try {
serial.open(System.properties["com.port"], 9600); // 设置波特率等参数
} catch (Exception e) {
System.err.println("Error opening port: " + e.getMessage());
}
```
2. **设置数据格式**:
```java
serial.setFlowControl(SerialPort.FLOWCONTROL_NONE);
```
3. **发送数据**:
```java
byte[] dataToSend = {0x01, 0x02, 0x03}; // 字节数组形式的数据
serial.write(dataToSend, 0, dataToSend.length);
```
**接受数据**:
```java
serial.addEventListener(new SerialPortEventListener() {
@Override
public void serialEvent(SerialPortEvent event) {
if (event.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
byte[] receivedData = new byte[serial.getReceiveBufferSize()];
int bytesRead = serial.read(receivedData, 0, receivedData.length);
if (bytesRead > 0) {
// Process the received data
String receivedString = new String(receivedData);
System.out.println("Received: " + receivedString);
}
}
}
});
```
记得定期检查事件并读取数据,因为串口通信可能会有阻塞。