/** *//******************************************
* 程序文件名称：SendComm.java
* 功能：从串行口COM1中发送数据
******************************************/
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.comm.*;
class S_Frame extends Frame implements Runnable,ActionListener
...{
/**//*检测系统中可用的通讯端口类 */
static CommPortIdentifier portId;
/**//*Enumeration 为枚举型类,在util中 */
static Enumeration portList;
OutputStream outputStream;
/**//*RS-232的串行口 */
SerialPort serialPort;
Thread readThread;
Panel p=new Panel();
TextField in_message=new TextField("打开COM1,波特率9600,数据位8,停止位1.");
TextArea out_message=new TextArea();
Button btnOpen=new Button("打开串口, 发送数据");
Button btnClose=new Button("关闭串口, 停止发送数据");
byte data[]=new byte[10240];
/**//*设置判断要是否关闭串口的标志*/
boolean mark;
/**//*安排窗体*/
S_Frame()
...{ super("串口发送数据");
setSize(200,200);
setVisible(true);
add(out_message,"Center");
add(p,"North");
p.add(btnOpen);
p.add(btnClose);
add(in_message,"South");
btnOpen.addActionListener(this);
btnClose.addActionListener(this);
} //R_Frame() end
/**//*点击按扭打开串口.*/
public void actionPerformed(ActionEvent event) ...{
if (event.getSource()==btnClose)...{
serialPort.close();//关闭串口
mark=true; //用于中止线程的run()方法
in_message.setText("串口COM1已经关闭,停止发送数据.");
}
else ...{ mark=false;
/**//*从文本区按字节读取数据*/
data=out_message.getText().getBytes();
/**//*打开串口*/
start();
in_message.setText("串口COM1已经打开,正在每2秒钟发送一次数据.....");
}
} //actionPerformed() end
/**//*打开串口,并调用线程发送数据*/
public void start()...{
/**//*获取系统中所有的通讯端口 */
portList=CommPortIdentifier.getPortIdentifiers();
/**//* 用循环结构找出串口 */
while (portList.hasMoreElements())...{
/**//*强制转换为通讯端口类型*/
portId=(CommPortIdentifier)portList.nextElement();
if(portId.getPortType() == CommPortIdentifier.PORT_SERIAL)...{
if (portId.getName().equals("COM1")) ...{
/**//*打开串口 */
try ...{
serialPort = (SerialPort) portId.open("ReadComm", 2000);
}
catch (PortInUseException e) ...{ }
/**//*设置串口输出流*/
try ...{
outputStream = serialPort.getOutputStream();
}
catch (IOException e) ...{}
} //if end
} //if end
} //while end
/**//*调用线程发送数据*/
try...{
readThread = new Thread(this);
//线程负责每发送一次数据，休眠2秒钟
readThread.start();
}
catch (Exception e) ...{ }
} //start() end
/**//*发送数据,休眠2秒钟后重发*/
public void run() ...{
/**//*设置串口通讯参数*/
try ...{
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
}
catch (UnsupportedCommOperationException e) ...{ }
/**//*发送数据流(将数组data[]中的数据发送出去)*/
try ...{
outputStream.write(data);
}
catch (IOException e) ...{ }
/**//*发送数据后休眠2秒钟,然后再重发*/
try ...{ Thread.sleep(2000);
if (mark)
...{return; //结束run方法,导致线程死亡
}
start();
}
catch (InterruptedException e) ...{ }
} //run() end
} //类S_Frame end
public class SendComm
...{public static void main(String args[])
...{ S_Frame S_win=new S_Frame();
S_win.addWindowListener(new WindowAdapter()
...{public void windowClosing(WindowEvent e)
...{System.exit(0); }
});
S_win.pack();
}
}
/** *//******************************************
* 程序文件名称：ReadComm.java
* 功能：从串行口COM1中接收数据
******************************************/
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.comm.*;
class R_Frame extends Frame implements Runnable,ActionListener,SerialPortEventListener
...{
/**//* 检测系统中可用的通讯端口类 */
static CommPortIdentifier portId;
/**//* Enumeration 为枚举型类,在java.util中 */
static Enumeration portList;
InputStream inputStream;
/**//* 声明RS-232串行端口的成员变量 */
SerialPort serialPort;
Thread readThread;
String str="";
TextField out_message=new TextField("上面文本框显示接收到的数据");
TextArea in_message=new TextArea();
Button btnOpen=new Button("打开串口");
/**//*建立窗体*/
R_Frame()
...{
super("串口接收数据");
setSize(200,200);
setVisible(true);
btnOpen.addActionListener(this);
add(out_message,"South");
add(in_message,"Center");
add(btnOpen,"North");
} //R_Frame() end
/**//*点击按扭所触发的事件：打开串口,并监听串口. */
public void actionPerformed(ActionEvent event)
...{
/**//*获取系统中所有的通讯端口 */
portList=CommPortIdentifier.getPortIdentifiers();
/**//* 用循环结构找出串口 */
while (portList.hasMoreElements())...{
/**//*强制转换为通讯端口类型*/
portId=(CommPortIdentifier)portList.nextElement();
if(portId.getPortType() == CommPortIdentifier.PORT_SERIAL)...{
if (portId.getName().equals("COM1")) ...{
try ...{
serialPort = (SerialPort) portId.open("ReadComm", 2000);
out_message.setText("已打开端口COM1 ,正在接收数据..... ");
}
catch (PortInUseException e) ...{ }
/**//*设置串口监听器*/
try ...{
serialPort.addEventListener(this);
}
catch (TooManyListenersException e) ...{ }
/**//* 侦听到串口有数据,触发串口事件*/
serialPort.notifyOnDataAvailable(true);
} //if end
} //if end
} //while end
readThread = new Thread(this);
readThread.start();//线程负责每接收一次数据休眠20秒钟
} //actionPerformed() end
/**//*接收数据后休眠20秒钟*/
public void run() ...{
try ...{
Thread.sleep(20000);
}
catch (InterruptedException e) ...{ }
} //run() end
/**//*串口监听器触发的事件，设置串口通讯参数，读取数据并写到文本区中*/
public void serialEvent(SerialPortEvent event) ...{
/**//*设置串口通讯参数：波特率、数据位、停止位、奇偶校验*/
try ...{
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
}
catch (UnsupportedCommOperationException e) ...{ }
byte[] readBuffer = new byte[20];
try ...{
inputStream = serialPort.getInputStream();
}
catch (IOException e) ...{}
try ...{
/**//* 从线路上读取数据流 */
while (inputStream.available() > 0) ...{
int numBytes = inputStream.read(readBuffer);
} //while end
str=new String(readBuffer);
/**//*接收到的数据存放到文本区中*/
in_message.append(str+" ");
}
catch (IOException e) ...{ }
} //serialEvent() end
} //类R_Frame end
public class ReadComm
...{
public static void main(String args[])
...{
/**//* 实例化接收串口数据的窗体类 */
R_Frame R_win=new R_Frame();
/**//* 定义窗体适配器的关闭按钮功能 */
R_win.addWindowListener(new WindowAdapter()
...{public void windowClosing(WindowEvent e)
...{System.exit(0); }
});
R_win.pack();
}
}
http://blog.csdn.net/djsl6071/article/details/1594204
