Java通过串口读取数据例子



下载javax.comm包后才能使用这些类。
// 功能：从串行口COM4中接收数据

import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import javax.comm.*;
import javax.swing.JFrame;

public class SimpleReadForm extends JFrame implements Runnable, SerialPortEventListener {

    public SimpleReadForm() {
        initComponents();
    }

    //
    private void initComponents() {

        messageText = new javax.swing.JTextField();
        jLabel1 = new javax.swing.JLabel();
        OpenButton = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        recText = new javax.swing.JTextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("收到的数据：");

        OpenButton.setText("打开串口");
        OpenButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                OpenButtonActionPerformed(evt);
            }
        });

        recText.setColumns(20);
        recText.setRows(5);
        jScrollPane1.setViewportView(recText);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(OpenButton)
                        .addGap(127, 127, 127))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 331, Short.MAX_VALUE)
                        .addContainerGap())
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jLabel1)