java - 从 JAR 文件读取/写入文件

Question

我已经完成了我正在开发的一些游戏，但是当用户想要保存和加载他之前的任何游戏时，当我需要保存/写入时，它在 Netbeans 中运行时工作正常，但是当我从netbeans生成的JAR运行它，只有当应用程序永远不会关闭时，它才起作用，我的意思是，它在关闭时会丢失所有数据，我猜是因为它没有写入或加载文件，当我收到此错误时从控制台运行它。该 txt 文件中只有一个 ArrayList，其中包含每个用户的信息，它也对 Records 文件执行相同的操作，仅存储游戏中排名前 10 的玩家。

    java.io.FileNotFoundException: saveFiles\Users\Usuarios.txt (The system cannot find the path specified)
    at java.io.FileOutputStream.open0(Native Method)
    at java.io.FileOutputStream.open(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at SaveNLoad.SaveUsers.saveUsers(SaveUsers.java:26)
    at CrossyMain.MainMenu$ButtonListening.actionPerformed(MainMenu.java:309)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$500(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

这是因为路径问题吗？在netbeans中，从那里加载它时，该路径似乎是绝对路径，但是我认为从JAR文件加载它时它不一样，任何建议将不胜感激!

以下是管理用户文件写/读操作的方法

    public static void saveUsers (ArrayList<User> usersToSave){

    try {                       //Used to Save Users

        File path = new File("saveFiles/Users/Usuarios.txt");
        System.out.println(path.getAbsolutePath());
        FileOutputStream writeUsers = new FileOutputStream(path);
        ObjectOutputStream userStream = new ObjectOutputStream(writeUsers);

        userStream.writeObject(usersToSave);

        userStream.close();

    } catch (IOException ex) {
        Logger.getLogger(SaveUsers.class.getName()).log(Level.SEVERE, null, ex);
    }

    } 

    public static void loadUsers (){

    try {

        File path = new File("saveFiles/Users/Usuarios.txt");
        System.out.println(path.getAbsolutePath());
        FileInputStream readUsers = new FileInputStream(path);
        ObjectInputStream userStream = new ObjectInputStream(readUsers);

        ArrayList<User> loaded = (ArrayList<User>) userStream.readObject();

        User.setUsers(loaded);

        userStream.close();

    } catch (IOException | ClassNotFoundException ex) {
        System.out.println("File Not Created");
    }

    }

记录文件的读/写操作(注意 sort() 只是一个使用比较器对 ArrayList 进行排序的函数)

private static final String RECORDSFILE = "saveFiles/Records/Records.txt";

public static void loadScoreFile() {

    try{
        inputStream = new ObjectInputStream(new FileInputStream(RECORDSFILE));
        scores = (ArrayList<Score>) inputStream.readObject();   
        sort();
        inputStream.close();
    } catch (IOException | ClassNotFoundException e) {

    } 

}

public void updateScoreFile() {

    try {
        outputStream = new ObjectOutputStream(new FileOutputStream(RECORDSFILE));
        sort();
        outputStream.writeObject(scores);
        outputStream.close();
    } catch (IOException e) {

    }

}    

同样，它在 netbeans 中工作正常，但在 JAR 文件中不起作用，如果你们需要我已经发布的更多代码，请让我知道!但这些是处理 2 个文件记录和用户的输入/输出操作的函数!任何建议将不胜感激!

Answer 1

它可以在 Netbeans 中工作，因为它不使用 JAR 文件，而是使用文件系统。

您无法写入正在运行的 JAR 文件内的文件。重新考虑您的要求。