界面

import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

class TestFrame implements ActionListener
{

    JButton savebutton = null;
    JRadioButton dnYesButton = null;
    JRadioButton dnNoBUtton = null;

    private PlmnSwitchFileManager plmnSwitchFileManager = PlmnSwitchFileManager.getInstance();

    private void init()
    {

	JFrame jf = new JFrame("dn parameter config");
	jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	dnYesButton = new JRadioButton("yes");
	dnNoBUtton = new JRadioButton("no");
	dnYesButton.setActionCommand("JRadioButtonStatus");
	dnYesButton.setMnemonic(KeyEvent.VK_A);
	dnNoBUtton.setActionCommand("JRadioButtonStatus");
	dnNoBUtton.setMnemonic(KeyEvent.VK_B);
	dnYesButton.addActionListener(this);
	dnNoBUtton.addActionListener(this);

	ButtonGroup bg = new ButtonGroup();
	bg.add(dnYesButton);
	bg.add(dnNoBUtton);
	initDnButtonSelectStatus();

	savebutton = new JButton("save");
	savebutton.addActionListener(this);
	savebutton.setEnabled(false);

	JLabel jLabel = new JLabel("hahahha");
	jLabel.setFont(new Font("", Font.PLAIN, 25));

	JPanel pan1 = new JPanel();
	pan1.add(savebutton);
	pan1.add(dnYesButton);
	pan1.add(dnNoBUtton);
	pan1.add(jLabel);
	pan1.setVisible(true);
	pan1.setSize(300, 300);

	jf.getContentPane().add(pan1);

	jf.setVisible(true);
	jf.setSize(500, 500);
	jf.setResizable(true);

    }

    private void initDnButtonSelectStatus()
    {
	dnNoBUtton.setSelected(!plmnSwitchFileManager.getStatus());
	dnYesButton.setSelected(plmnSwitchFileManager.getStatus());
    }

    public static void main(String args[])
    {

	TestFrame testFrame = new TestFrame();
	testFrame.init();
    }

    @Override
    public void actionPerformed(ActionEvent e)
    {
	if (e.getSource() == savebutton)
	{
	    processFiles();
	    JOptionPane.showMessageDialog(null, "保存成功");
	    savebutton.setEnabled(false);
	}
	if (e.getActionCommand().equals("JRadioButtonStatus"))
	{
	    processSaveButtonEnabledStatus();
	}

    }

    private void processSaveButtonEnabledStatus()
    {
	if (isButtonAndFileStatusConsistent())
	{
	    savebutton.setEnabled(false);

	}
	else
	    savebutton.setEnabled(true);
    }

    private void processFiles()
    {
	if (dnYesButton.isSelected() != plmnSwitchFileManager.getStatus())
	{
	    processDnContainPlmn();
	}

    }

    private boolean isButtonAndFileStatusConsistent()
    {
	// TODO 返回条件或上另外一个不一致的状态
	return dnYesButton.isSelected() == plmnSwitchFileManager.getStatus();

    }

    private void processDnContainPlmn()
    {
	plmnSwitchFileManager.processDnContainPlmnFile(dnYesButton.isSelected());
    }

}

　　

 文件解析类

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class PlmnSwitchFileManager
{
    private static PlmnSwitchFileManager plmnSwitchFileManager = new PlmnSwitchFileManager();
    // 开关状态，和配置文件保持一致
    private boolean status = false;

    private String filePath = System.getProperty("user.dir") + File.separator + "conf" + File.separator
	    + "a.properties";

    public static PlmnSwitchFileManager getInstance()
    {
	return plmnSwitchFileManager;
    }

    private PlmnSwitchFileManager()
    {
	try
	{
	    status = getStatusFromFile();
	}
	catch (IOException e)
	{
	    // TODO Auto-generated catch block
	    e.printStackTrace();
	}
    }

    public boolean getStatus()
    {
	return status;
    }

    private void setStatus(Boolean content)
    {
	status = content;
    }

    public void writeStatusToFile(Boolean content)
    {
	Properties prop = new Properties();
	try
	{
	    FileOutputStream oFile = new FileOutputStream(filePath);
	    prop.setProperty("switch", String.valueOf(content));
	    prop.store(oFile, "");
	    oFile.close();
	}
	catch (Exception e)
	{
	    e.printStackTrace();
	}

    }

    private boolean getStatusFromFile() throws IOException
    {
	String value = "";
	Properties prop = new Properties();
	InputStream in = new BufferedInputStream(new FileInputStream(filePath));
	prop.load(in);
	value = prop.getProperty("switch");
	in.close();
	return Boolean.valueOf(value);
    }

    public void processDnContainPlmnFile(boolean newStatus)
    {
	setStatus(newStatus);
	writeStatusToFile(newStatus);
	synFileToSlave();
    }

    private void synFileToSlave()
    {
	File fine = new File("");

    }

}