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java232教程

Java教程 来源： 网络 编辑：小编 发布时间：2025-02-27 14:42:03 浏览量：59



package com.elkan1788.view; import java.awt.BorderLayout; import java.awt.Button; import java.awt.Color; import java.awt.Font; import java.awt.GridLayout; import java.awt.Image; import java.awt.TextArea; import java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.Enumeration; import java.util.List; import java.util.TooManyListenersException; import javax.comm.CommPortIdentifier; import javax.comm.NoSuchPortException; import javax.comm.PortInUseException; import javax.comm.SerialPort; import javax.comm.SerialPortEvent; import javax.comm.SerialPortEventListener; import javax.comm.UnsupportedCommOperationException; import javax.imageio.ImageIO; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.SwingConstants; import javax.swing.border.EmptyBorder; public class JavaRs232 extends JFrame implements ActionListener, SerialPortEventListener { / * JDK Serial Version UID */ private static final long serialVersionUID = -L; protected int WIN_WIDTH = 380; protected int WIN_HEIGHT = 300; private JComboBox<?> portCombox, rateCombox, dataCombox, stopCombox, parityCombox; private Button openPortBtn, closePortBtn, sendMsgBtn; private TextField sendTf; private TextArea readTa; private JLabel statusLb; private String portname, rate, data, stop, parity; protected CommPortIdentifier portId; protected Enumeration<?> ports; protected List<String> portList; protected SerialPort serialPort; protected OutputStream outputStream = null; protected InputStream inputStream = null; protected String mesg; protected int sendCount, reciveCount; / * 默认构造函数 */ public JavaRs232() { super("Java RS-232串口通信测试程序 凡梦星尘"); setSize(WIN_WIDTH, WIN_HEIGHT); setLocationRelativeTo(null); Image icon = null; try { icon = ImageIO.read(JavaRs232.class.getResourceAsStream("/res/rs232.png")); } catch (IOException e) { showErrMesgbox(e.getMessage()); } setIconImage(icon); setResizable(false); scanPorts(); initComponents(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } / * 初始化各UI组件 * @since 2012-3-22 下午11:56:39 */ public void initComponents() { // 共用常量 Font lbFont = new Font("微软雅黑", Font.TRUETYPE_FONT, 14); // 创建左边面板 JPanel northPane = new JPanel(); northPane.setLayout(new GridLayout(1, 1)); // 设置左边面板各组件 JPanel leftPane = new JPanel(); leftPane.setOpaque(false); leftPane.setLayout(new GridLayout(3,2)); JLabel portnameLb = new JLabel("串口号："); portnameLb.setFont(lbFont); portnameLb.setHorizontalAlignment(SwingConstants.RIGHT); portCombox = new JComboBox<String>((String [])portList.toArray(new String[0])); portCombox.addActionListener(this); JLabel databitsLb = new JLabel("数据位："); databitsLb.setFont(lbFont); databitsLb.setHorizontalAlignment(SwingConstants.RIGHT); dataCombox = new JComboBox<Integer>(new Integer[]{5, 6, 7, 8}); dataCombox.setSelectedIndex(3); dataCombox.addActionListener(this); JLabel parityLb = new JLabel("校验位："); parityLb.setFont(lbFont); parityLb.setHorizontalAlignment(SwingConstants.RIGHT); parityCombox = new JComboBox<String>(new String[]{"NONE","ODD","EVEN","MARK","SPACE"}); parityCombox.addActionListener(this); // 添加组件至面板  leftPane.add(portnameLb); leftPane.add(portCombox); leftPane.add(databitsLb); leftPane.add(dataCombox); leftPane.add(parityLb); leftPane.add(parityCombox); //创建右边面板 JPanel rightPane = new JPanel(); rightPane.setLayout(new GridLayout(3,2)); // 设置右边面板各组件 JLabel baudrateLb = new JLabel("波特率："); baudrateLb.setFont(lbFont); baudrateLb.setHorizontalAlignment(SwingConstants.RIGHT); rateCombox = new JComboBox<Integer>(new Integer[]{2400,4800,9600,14400,19200,38400,56000}); rateCombox.setSelectedIndex(2); rateCombox.addActionListener(this); JLabel stopbitsLb = new JLabel("停止位："); stopbitsLb.setFont(lbFont); stopbitsLb.setHorizontalAlignment(SwingConstants.RIGHT); stopCombox = new JComboBox<String>(new String[]{"1","2","1.5"}); stopCombox.addActionListener(this); openPortBtn = new Button("打开端口"); openPortBtn.addActionListener(this); closePortBtn = new Button("关闭端口"); closePortBtn.addActionListener(this); // 添加组件至面板  rightPane.add(baudrateLb); rightPane.add(rateCombox); rightPane.add(stopbitsLb); rightPane.add(stopCombox); rightPane.add(openPortBtn); rightPane.add(closePortBtn); // 将左右面板组合添加到北边的面板  northPane.add(leftPane); northPane.add(rightPane); // 创建中间面板 JPanel centerPane = new JPanel(); // 设置中间面板各组件 sendTf = new TextField(42); readTa = new TextArea(8,50); readTa.setEditable(false); readTa.setBackground(new Color(225,242,250)); centerPane.add(sendTf); sendMsgBtn = new Button(" 发送 "); sendMsgBtn.addActionListener(this); // 添加组件至面板  centerPane.add(sendTf); centerPane.add(sendMsgBtn); centerPane.add(readTa); // 设置南边组件 statusLb = new JLabel(); statusLb.setText(initStatus()); statusLb.setOpaque(true); // 获取主窗体的容器,并将以上三面板以北、中、南的布局整合 JPanel contentPane = (JPanel)getContentPane(); contentPane.setLayout(new BorderLayout()); contentPane.setBorder(new EmptyBorder(0, 0, 0, 0)); contentPane.setOpaque(false); contentPane.add(northPane, BorderLayout.NORTH); contentPane.add(centerPane, BorderLayout.CENTER); contentPane.add(statusLb, BorderLayout.SOUTH); } / * 初始化状态标签显示文本 * @return String * @since 2012-3-23 上午12:01:53 */ public String initStatus() { portname = portCombox.getSelectedItem().toString(); rate = rateCombox.getSelectedItem().toString(); data = dataCombox.getSelectedItem().toString(); stop = stopCombox.getSelectedItem().toString(); parity = parityCombox.getSelectedItem().toString(); StringBuffer str = new StringBuffer("当前串口号:"); str.append(portname).append(" 波特率:"); str.append(rate).append(" 数据位:"); str.append(data).append(" 停止位:"); str.append(stop).append(" 校验位:"); str.append(parity); return str.toString(); } / * 扫描本机的所有COM端口 * @since 2012-3-23 上午12:02:42 */ public void scanPorts() { portList = new ArrayList<String>(); Enumeration<?> en = CommPortIdentifier.getPortIdentifiers(); CommPortIdentifier portId; while(en.hasMoreElements()){ portId = (CommPortIdentifier) en.nextElement(); if(portId.getPortType() == CommPortIdentifier.PORT_SERIAL){ String name = portId.getName(); if(!portList.contains(name)) { portList.add(name); } } } if(null == portList || portList.isEmpty()) { showErrMesgbox("未找到可用的串行端口号,程序无法启动!"); System.exit(0); } } / * 打开串行端口 * @since 2012-3-23 上午12:03:07 */ public void openSerialPort() { // 获取要打开的端口 try { portId = CommPortIdentifier.getPortIdentifier(portname); } catch (NoSuchPortException e) { showErrMesgbox("抱歉,没有找到"+portname+"串行端口号!"); setComponentsEnabled(true); return ; } // 打开端口 try { serialPort = (SerialPort) portId.open("JavaRs232", 2000); statusLb.setText(portname+"串口已经打开!"); } catch (PortInUseException e) { showErrMesgbox(portname+"端口已被占用,请检查!"); setComponentsEnabled(true); return ; } // 设置端口参数 try { int rate = Integer.parseInt(this.rate); int data = Integer.parseInt(this.data); int stop = stopCombox.getSelectedIndex()+1; int parity = parityCombox.getSelectedIndex(); serialPort.setSerialPortParams(rate,data,stop,parity); } catch (UnsupportedCommOperationException e) { showErrMesgbox(e.getMessage()); } // 打开端口的IO流管道  try { outputStream = serialPort.getOutputStream(); inputStream = serialPort.getInputStream(); } catch (IOException e) { showErrMesgbox(e.getMessage()); } // 给端口添加监听器 try { serialPort.addEventListener(this); } catch (TooManyListenersException e) { showErrMesgbox(e.getMessage()); } serialPort.notifyOnDataAvailable(true); } / * 给串行端口发送数据 * @since 2012-3-23 上午12:05:00 */ public void sendDataToSeriaPort() { try { sendCount++; outputStream.write(mesg.getBytes()); outputStream.flush(); } catch (IOException e) { showErrMesgbox(e.getMessage()); } statusLb.setText(" 发送: "+sendCount+" 接收: "+reciveCount); } / * 关闭串行端口 * @since 2012-3-23 上午12:05:28 */ public void closeSerialPort() { try { if(outputStream != null) outputStream.close(); if(serialPort != null) serialPort.close(); serialPort = null; statusLb.setText(portname+"串口已经关闭!"); sendCount = 0; reciveCount = 0; sendTf.setText(""); readTa.setText(""); } catch (Exception e) { showErrMesgbox(e.getMessage()); } } / * 显示错误或警告信息 * @param msg 信息 * @since 2012-3-23 上午12:05:47 */ public void showErrMesgbox(String msg) { JOptionPane.showMessageDialog(this, msg); } / * 各组件行为事件监听 */ public void actionPerformed(ActionEvent e) { if(e.getSource() == portCombox || e.getSource() == rateCombox || e.getSource() == dataCombox || e.getSource() == stopCombox || e.getSource() == parityCombox){ statusLb.setText(initStatus()); } if(e.getSource() == openPortBtn){ setComponentsEnabled(false); openSerialPort(); } if(e.getSource() == closePortBtn){ if(serialPort != null){ closeSerialPort(); } setComponentsEnabled(true); } if(e.getSource() == sendMsgBtn){ if(serialPort == null){ showErrMesgbox("请先打开串行端口!"); return ; } mesg = sendTf.getText(); if(null == mesg || mesg.isEmpty()){ showErrMesgbox("请输入你要发送的内容!"); return ; } sendDataToSeriaPort(); } } / * 端口事件监听 */ 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[50]; try { while (inputStream.available() > 0) { inputStream.read(readBuffer); } StringBuilder receivedMsg = new StringBuilder("/-- "); receivedMsg.append(new String(readBuffer).trim()).append(" --/ "); readTa.append(receivedMsg.toString()); reciveCount++; statusLb.setText(" 发送: "+sendCount+" 接收: "+reciveCount); } catch (IOException e) { showErrMesgbox(e.getMessage()); } } } / * 设置各组件的开关状态 * @param enabled 状态 * @since 2012-3-23 上午12:06:24 */ public void setComponentsEnabled(boolean enabled) { openPortBtn.setEnabled(enabled); openPortBtn.setEnabled(enabled); portCombox.setEnabled(enabled); rateCombox.setEnabled(enabled); dataCombox.setEnabled(enabled); stopCombox.setEnabled(enabled); parityCombox.setEnabled(enabled); } / * 运行主函数 * @param args * @since 2012-3-23 上午12:06:45 */ public static void main(String[] args) { new JavaRs232(); } }

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