如何使用File对象获取文件的目录？

Consider the code:

考虑一下代码：

File file = new File("c:\\temp\\java\\testfile");

testfile is a file, and it may or may not exist. I want to get the directory c:\\temp\\java\\ using the File object. How do I go about doing this?

testfile是一个文件，它可能存在也可能不存在。我想使用File对象获取目录c：\\ temp \\ java \\。我该怎么做呢？

9 个解决方案

#1

130

In either case, I'd expect file.getParent() (or file.getParentFile()) to give you what you want.

在任何一种情况下，我都希望file.getParent（）（或file.getParentFile（））能够满足您的需求。

Additionally, if you want to find out whether the original File does exist and is a directory, then exists() and isDirectory() are what you're after.

另外，如果你想知道原始文件是否存在并且是一个目录，那么exists（）和isDirectory（）就是你所追求的。

#2

File.getParent() from Java Documentation

Java文档中的File.getParent（）

#3

File API File.getParent or File.getParentFile should return you Directory of file.

文件API File.getParent或File.getParentFile应该返回文件目录。

Your code should be like :

你的代码应该是这样的：

    File file = new File("c:\\temp\\java\\testfile");
    if(!file.exists()){
        file = file.getParentFile();
    }

You can additionally check your parent file is directory using File.isDirectory API

您还可以使用File.isDirectory API检查您的父文件是否为目录

if(file.isDirectory()){
    System.out.println("file is directory ");
}

#4

File directory = new File("Enter any 
                directory name or file name");
boolean isDirectory = directory.isDirectory();
if (isDirectory) {
  // It returns true if directory is a directory.
  System.out.println("the name you have entered 
         is a directory  : "  +    directory);  
  //It returns the absolutepath of a directory.
  System.out.println("the path is "  + 
              directory.getAbsolutePath());
} else {
  // It returns false if directory is a file.
  System.out.println("the name you have
   entered is a file  : " +   directory);
  //It returns the absolute path of a file.
  System.out.println("the path is "  +  
            file.getParent());
}

#5

File filePath=new File("your_file_path");
String dir="";
if (filePath.isDirectory())
{
    dir=filePath.getAbsolutePath();
}
else
{
    dir=filePath.getAbsolutePath().replaceAll(filePath.getName(), "");
}

#6

If you do something like this:

如果您这样做：

File file = new File("test.txt");
String parent = file.getParent();

parent will be null.

parent将为null。

So to get directory of this file you can do next:

因此，要获取此文件的目录，您可以执行下一步：

parent = file.getAbsoluteFile().getParent();

#7

You can use this

你可以用它

 File dir=new File(TestMain.class.getClassLoader().getResource("filename").getPath());

#8

String parentPath = f.getPath().substring(0, f.getPath().length() - f.getName().length());

This would be my solution

这将是我的解决方案

#9

-1

I found this more useful for getting the absolute file location.

我发现这对于获取绝对文件位置更有用。

File file = new File("\\TestHello\\test.txt");
System.out.println(file.getAbsoluteFile());

#1

130