java - 自定义卸载程序无法在 Java 中自毁

Question

我正在尝试使用 Java 制作自定义卸载程序，我可以使用 Launch4J 将其转换为控制台应用程序。我想要实现的是卸载程序完成后，它需要打开命令提示符将其删除，然后删除安装文件夹。但是，我只收到此错误:该进程无法访问该文件，因为它正在被另一个进程使用
process，但是我可以看到卸载程序已经被删除，但是安装目录还没有。难道卸载程序仍然在内存中打开，或者我可以做什么来解决这个问题？

public static void main(String[] args) {
    String command;
    command = "\"";
    command += "echo Self Destruction Commenced.";
    command += "& del /f /q \"" + System.getProperty("user.dir") + "\\uninstaller.exe\"";
    command += "& rmdir /q /s \"" + System.getProperty("user.dir") + "\"";
    command += "& echo. & echo MyProgram successfully uninstalled...";
    command += "& set /p exitkey= \"Press [ENTER] key to finish...\" ";
    command += "\"";
    selfDestructProgram("start cmd.exe /c " + command);
}

private static void selfDestructProgram(String command) {
    ProcessBuilder processBuilder = new ProcessBuilder();
    processBuilder.command("cmd.exe", "/c", command);
    try {
        Process process = processBuilder.start();
        process.waitFor();
    } catch (Exception var3) {
        var3.printStackTrace();
    }
}

Answer 1

安装目录是新cmd中仍然打开的进程。你需要做的就是使用新打开的cmd cd 到安装目录的父目录，然后就可以删除它了。请改用下面的代码:

public static void main(String[] args) {
    //get the path to the parent directory
    File workingDir = new File(System.getProperty("user.dir"));
    String parentDir = workingDir.getParent();

    String command;
    command = "\"";
    command += "echo Self Destruction Commenced.";
    command += "& del /f /q \"" + System.getProperty("user.dir") + "\\uninstaller.exe\"";
    command += "& rmdir /q /s \"" + System.getProperty("user.dir") + "\"";
    command += "& echo. & echo MyProgram successfully uninstalled...";
    command += "& set /p exitkey= \"Press [ENTER] key to finish...\" ";
    command += "\"";

    //first cd to this parent directory before deleting the child directory, which is the installtion directory.
    selfDestructProgram("cd /d " + parentDir + " & start cmd.exe /c " + command);
}

private static void selfDestructProgram(String command) {
    ProcessBuilder processBuilder = new ProcessBuilder();
    processBuilder.command("cmd.exe", "/c", command);
    try {
        Process process = processBuilder.start();
        process.waitFor();
    } catch (Exception var3) {
        var3.printStackTrace();
    }
}

目前无法删除安装目录，因为它在cmd中打开，导致其被锁定，无法进行删除或重命名或其他一些文件操作。