Question

也许有点尴尬，但几个小时后我仍然无法用Java创建文件......

File file = new File(dirName + "/" + fileName);
try
{
    // --> ** this statement gives an exception 'the system cannot find the path'
    file.createNewFile();
    // --> ** this creates a folder also named a directory with the name fileName
    file.mkdirs();
    System.out.println("file != null");
    return file;
}
catch (Exception e)
{
    System.out.println(e.getMessage());
    return null;
}

我在这里缺少什么？

Answer 1

首先尝试创建父目录：

File file = new File(dirName + File.separator + fileName);
try {
    file.getParentFile().mkdirs();
    file.createNewFile();
    System.out.println("file != null");
    return file;
}
catch (Exception e)
{
    System.out.println(e.getMessage());
    return null;
}

Answer 2

String dirName="c:\\dir1\\dir2";
    String fileName="fileName.txt";
    File file = new File(dirName + "/" + fileName);
    try {
        new File(dirName).mkdirs();   // directory created here
        file.createNewFile();  // file created here
        System.out.println("file != null");
        return file;
    }catch(Exception e)
         {
            System.out.println(e.getMessage());
            return null;
         }

如何在java（不是文件夹）中创建文件？

2 个答案: