Question

我正在尝试复制和现有的目录结构（不需要文件内容本身，0长度的虚拟文件会这样做）。但是mkdirs()不会创建必要的目录，导致file.createNewFile()抛出IOException。代码是：

private static void readAndCopy(File fileToCopy) throws IOException {
    File localVersion = new File(fileToCopy.getCanonicalPath().replace("O:\\", "C:\\xfer\\"));
    System.out.println("Replicating " + fileToCopy.getCanonicalPath() + " to " + localVersion.getCanonicalPath());

    if (fileToCopy.isDirectory()) {
        boolean dirCreated = localVersion.getParentFile().mkdirs();
        System.out.println(localVersion.getCanonicalPath() + " " + (dirCreated ? "" : "not ") + "created");

        if (dirCreated) {
            for (File content : fileToCopy.listFiles()) {
                readAndCopy(content);
            }
        }

    } else {
        if (!localVersion.exists()) {
            localVersion.createNewFile();
        }
    }
}

public static void main(String[] args) throws IOException {
    readAndCopy(new File("o:\\MY_SRC_DIR"));
}

错误消息是：

java.io.IOException: The system cannot find the path specified
    at java.io.WinNTFileSystem.createFileExclusively(Native Method)
    at java.io.File.createNewFile(Unknown Source)

我也试过

File origParentFile = fileToCopy.getParentFile();
File newParent = new File(origParentFile.getCanonicalPath().replace("O:\\", "C:\\xfer\\"));
localVersion = new File(newParent, fileToCopy.getName());

，但这也不起作用。

Answer 1

你错了。 “mkdirs（）is creating all the directories including the file name itself as a directory. You need to call localVersion.getParentFile（）。mkdirs（）。`

java文件mkdirs和createNewFile将无法正常工作

1 个答案: