****请注意，我的问题是关于另一个线程的答案。然而，当我在那个线程中发布问题时，它被删除了。所以我在这里重新发布了这个问题(有一个链接到我所指的确切帖子)。* * * *
我有几个问题，随着这个线程。如果我有一个定时器(updateTimer)，我想在窗口关闭时取消，我能把它放在System.out的地方吗?println("窗户关闭");声明吗?或者我必须把它放在实际的"视图"类中(我有三个类DesktopApplication。应用,DesktopApplication。View和DesktopApplication。AboutBox和configure Window方法在。app类中)。
在这一行，如果我可以把updateTimer.cancel();行，那么这是否意味着我可以从文件中读取/写入，并填充文本框(WindowOpen事件)，并在关闭事件中将信息写入文件?
我想做的是:当我的应用程序启动(和主窗口打开)，我想检查配置文件。如果存在，那么我想从该文件获取用户名、密码、隧道ID和IP地址——并在主jPanel中填充它们各自的文本框。如果它不存在，那么我不会对它做任何事情。
在关闭应用程序时，我想要发生两件事:1)任何正在运行的UpdateTimers将被取消(有效和干净地关闭应用程序)和2)将用户名，密码，隧道ID和IP地址写入下次运行的配置文件。
我已经在Netbeans中创建了这个文件，所以"exitMenu"是自动生成的，并且没有配置"关闭按钮"。所以我需要使用WindowClosing来完成这一点(或在文本编辑器中破解"exitMenu"方法，并希望它不会与Netbeans产生问题)。
我还应该补充说，用户名和密码实际上是真实用户名和密码的MD5哈希值。因此，虽然有人可能打开文本文件并读取它们，但他们只会看到这样的内容:
c28de38997efb893872d893982ac3289年ab83ce8f398289d938999cab12345192.168.2.2
谢谢，祝你有美好的一天。
帕特里克。编辑以包含将被存储的"用户名和密码"信息
我可以把它放在System.out的位置吗?println("窗户关闭");声明吗?
是的，您可以在侦听器中放入任意代码
是的在这一行，如果我可以把updateTimer.cancel();行，那么这是否意味着我可以从文件中读取/写入，并填充文本框(WindowOpen事件)，并在关闭事件中将信息写入文件?
我最终是这样完成的。
在我的"TunnelbrokerUpdateView"类(实际处理主框架的那个)中，我添加了以下代码:
WindowListener wl = new WindowListener(){
public void windowOpened(WindowEvent e)
{
try
{
FileReader fr = new FileReader (new File("userinfo.txt"));
BufferedReader br = new BufferedReader (fr);
jTextField1.setText(br.readLine());
jPasswordField1.setText(br.readLine());
jTextField2.setText(br.readLine());
oldIPAddress = br.readLine();
br.close();
}
catch (FileNotFoundException ex) {
// Pop up a dialog box explaining that this information will be saved
// and propogated in the future.. "First time running this?"
int result = JOptionPane.showConfirmDialog((Component)
null, "After you enter your user information, this box will no longer show.", "First Run", JOptionPane.DEFAULT_OPTION);
}
catch (java.io.IOException ea)
{
Logger.getLogger(TunnelbrokerUpdateView.class.getName()).log(Level.SEVERE, null, ea);
}
}
public void windowClosing(WindowEvent e) {
updateTimer.cancel();
BufferedWriter userData;
//Handle saving the user information to a file "userinfo.txt"
try
{
userData = new BufferedWriter(new FileWriter("userinfo.txt"));
StringBuffer sb = new StringBuffer();
sb.append(jTextField1.getText());
sb.append(System.getProperty("line.separator"));
sb.append(jPasswordField1.getText());
sb.append(System.getProperty("line.separator"));
sb.append(jTextField2.getText());
sb.append(System.getProperty("line.separator"));
sb.append(oldIPAddress);
userData.write(sb.toString());
userData.close();
}
catch (java.io.IOException ex)
{
Logger.getLogger(TunnelbrokerUpdateView.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void windowClosed(WindowEvent e) {
System.exit(0);
}
public void windowIconified(WindowEvent e) {}
public void windowDeiconified(WindowEvent e) {}
public void windowActivated(WindowEvent e) {}
public void windowDeactivated(WindowEvent e) {}
};
super.getFrame().addWindowListener(wl);
}
我将其添加到"public TunnelbrokerUpdateView(SingleFrameApplication app)"方法中。所以，一切都如我所愿。我相信有更好的方法来整合用户信息，但这种方法既快又脏。在未来，我确实计划加密数据(或将其转换为通常不可读的格式)，因为涉及密码哈希。
希望这能在将来对别人有所帮助。
(供参考，这里是整个方法(包括Netbeans自动放入的东西)
public TunnelbrokerUpdateView(SingleFrameApplication app) {
super(app);
initComponents();
// status bar initialization - message timeout, idle icon and busy animation, etc
ResourceMap resourceMap = getResourceMap();
int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
messageTimer = new Timer(messageTimeout, new ActionListener() {
public void actionPerformed(ActionEvent e) {
statusMessageLabel.setText("");
}
});
messageTimer.setRepeats(false);
int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
for (int i = 0; i < busyIcons.length; i++) {
busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
}
busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
public void actionPerformed(ActionEvent e) {
busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
}
});
idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
statusAnimationLabel.setIcon(idleIcon);
progressBar.setVisible(false);
// connecting action tasks to status bar via TaskMonitor
TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
public void propertyChange(java.beans.PropertyChangeEvent evt) {
String propertyName = evt.getPropertyName();
if ("started".equals(propertyName)) {
if (!busyIconTimer.isRunning()) {
statusAnimationLabel.setIcon(busyIcons[0]);
busyIconIndex = 0;
busyIconTimer.start();
}
progressBar.setVisible(true);
progressBar.setIndeterminate(true);
} else if ("done".equals(propertyName)) {
busyIconTimer.stop();
statusAnimationLabel.setIcon(idleIcon);
progressBar.setVisible(false);
progressBar.setValue(0);
} else if ("message".equals(propertyName)) {
String text = (String)(evt.getNewValue());
statusMessageLabel.setText((text == null) ? "" : text);
messageTimer.restart();
} else if ("progress".equals(propertyName)) {
int value = (Integer)(evt.getNewValue());
progressBar.setVisible(true);
progressBar.setIndeterminate(false);
progressBar.setValue(value);
}
}
});
// This will take care of Opening and Closing
WindowListener wl = new WindowListener(){
public void windowOpened(WindowEvent e)
{
try
{
FileReader fr = new FileReader (new File("userinfo.txt"));
BufferedReader br = new BufferedReader (fr);
jTextField1.setText(br.readLine());
jPasswordField1.setText(br.readLine());
jTextField2.setText(br.readLine());
oldIPAddress = br.readLine();
br.close();
}
catch (FileNotFoundException ex) {
// Pop up a dialog box explaining that this information will be saved
// and propogated in the future.. "First time running this?"
int result = JOptionPane.showConfirmDialog((Component)
null, "After you enter your user information, this box will no longer show.", "First Run", JOptionPane.DEFAULT_OPTION);
}
catch (java.io.IOException ea)
{
Logger.getLogger(TunnelbrokerUpdateView.class.getName()).log(Level.SEVERE, null, ea);
}
}
public void windowClosing(WindowEvent e) {
updateTimer.cancel();
BufferedWriter userData;
//Handle saving the user information to a file "userinfo.txt"
try
{
userData = new BufferedWriter(new FileWriter("userinfo.txt"));
StringBuffer sb = new StringBuffer();
sb.append(jTextField1.getText());
sb.append(System.getProperty("line.separator"));
sb.append(jPasswordField1.getText());
sb.append(System.getProperty("line.separator"));
sb.append(jTextField2.getText());
sb.append(System.getProperty("line.separator"));
sb.append(oldIPAddress);
userData.write(sb.toString());
userData.close();
}
catch (java.io.IOException ex)
{
Logger.getLogger(TunnelbrokerUpdateView.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void windowClosed(WindowEvent e) {
System.exit(0);
}
public void windowIconified(WindowEvent e) {}
public void windowDeiconified(WindowEvent e) {}
public void windowActivated(WindowEvent e) {}
public void windowDeactivated(WindowEvent e) {}
};
super.getFrame().addWindowListener(wl);
}
祝你今天愉快:)帕特里克。