java向属性文件中添加信息

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); } }}