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   源码介绍

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写入后看到的效果如下：

package com.mingrisoft;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

public class SavePropertiesFrame extends JFrame {

    /**
     * 
     */
    private static final long serialVersionUID = 6821023217912862890L;
    private JPanel contentPane;
    private JTextField keyTextField;
    private JTextField valueTextField;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    SavePropertiesFrame frame = new SavePropertiesFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public SavePropertiesFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 374, 227);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
        setTitle("向属性文件中写数据");
        JPanel panel = new JPanel();
        panel.setBounds(0, 0, 364, 262);
        contentPane.add(panel);
        panel.setLayout(null);

        JLabel keyLabel = new JLabel("Key值：");
        keyLabel.setBounds(41, 52, 54, 15);
        panel.add(keyLabel);

        JLabel valueLabel = new JLabel("Value值：");
        valueLabel.setBounds(34, 101, 61, 21);
        panel.add(valueLabel);

        keyTextField = new JTextField();
        keyTextField.setBounds(92, 49, 184, 21);
        panel.add(keyTextField);
        keyTextField.setColumns(10);

        valueTextField = new JTextField();
        valueTextField.setBounds(93, 101, 183, 21);
        panel.add(valueTextField);
        valueTextField.setColumns(10);

        JButton saveButton = new JButton("写入");
        saveButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                do_saveButton_actionPerformed(arg0);
            }
        });
        saveButton.setBounds(141, 149, 77, 23);
        panel.add(saveButton);
    }

    // 写入按钮的单击处理事件
    protected void do_saveButton_actionPerformed(ActionEvent arg0) {
        String key = keyTextField.getText();
        String value = valueTextField.getText();
        if ((!key.equals("") && (key != null)) && ((!value.equals("")) && (value != null))) {
            SaveProperties properties = new SaveProperties();
            properties.saveProperties(key, value);
            JOptionPane.showMessageDialog(getContentPane(), "数据写入成功！", "信息对话框", JOptionPane.WARNING_MESSAGE);
        }

    }
}