1、Java串口通信程序程序及注释 可编译运行Java的串口通信程序 对于JVM来说,要正确的识别串口,将这几个文件放在系统中合适的位置使很重要的。 %JAVA_HOME%/lib%JAVA_HOME%/jre/lib/ext %windir%system32 %JAVA_HOME%/lib%JAVA_HOME%/jre/lib你可以通过编译和运行Sun的例程来验证串口是否可以使用了。JBuilder中安装Java Communication API(以下在JBuilder 2006中测试通过)如果你使用JBuilder,那么还需要为JBuilder配置API。 BorlandJBuilder20
2、06jdk1.5的相应位置。我使用的是JCreator,在打开Configure,然后点击option,选中jdkprofile然后双击选中的jdk文件,选择edit,在弹出的窗口中选择串口通信包所在的文件(.jar文件),这样配置就算完成了。以下分别是接收和发送程序,CSDN上搜的,省的自己写了:发送程序:import java.awt.*;import java.awt.event.*;import java.io.*;import java.util.*; class S_Frame extends Frame implements Runnable,ActionListener/*检测
3、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();B
4、utton 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 byte10240;/*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.addAc
5、tionListener(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.getT
6、ext().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.
7、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 /wh
8、ile end/*调用线程发送数据*/tryreadThread = 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 (UnsupportedCommOp
9、erationException 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 endpublic class SendCommpublic static void main(String args) S_Frame
10、 S_win=new S_Frame();S_win.addWindowListener(new WindowAdapter()public void windowClosing(WindowEvent e)System.exit(0); );S_win.pack();接收程序:import java.awt.*;import java.awt.event.*;import java.io.*;import java.util.*; class R_Frame extends Frame implementsRunnable,ActionListener,SerialPortEventList
11、ener/*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();Bu
12、tton 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*/port
13、List=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, 2
14、000);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 endreadThread = new Thread(this);readThread.start(); /线程负责
15、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(200);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*/tryserialPort.setSerialPortParams(9600,SerialPort.DATABIT
16、S_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);catch (UnsupportedCommOperationException e) byte readBuffer = new byte20;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 endstr
17、=new String(readBuffer);/*接收到的数据存放到文本区中*/in_message.append(str+n);catch (IOException e) /serialEvent() end /类R_Frame endpublic class ReadCommpublic 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();
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