检查路径是表示文件还是文件夹 [英] Check if a path represents a file or a folder

问题描述

我需要一个有效的方法来检查 String 是否代表文件或目录的路径。 Android中有效的目录名称是什么？当它出来时，文件夹名称可以包含'。'字符，那么系统如何理解是存在文件还是文件夹？在此先感谢。

I need a valid method to check if a String represents a path for file or a directory. What are valid directory names in Android? As it comes out, folder names can contain '.' chars, so how does system understand whether there's a file or a folder? Thanks in advance.

推荐答案

假设路径是你的字符串。

File file = new File(path);

boolean exists =      file.exists();      // Check if the file exists
boolean isDirectory = file.isDirectory(); // Check if it's a directory
boolean isFile =      file.isFile();      // Check if it's a regular file

参见 文件 Javadoc

See File Javadoc

或者您可以使用NIO类文件并检查以下内容：

Or you can use the NIO class Files and check things like this:

Path file = new File(path).toPath();

boolean exists =      Files.exists(file);        // Check if the file exists
boolean isDirectory = Files.isDirectory(file);   // Check if it's a directory
boolean isFile =      Files.isRegularFile(file); // Check if it's a regular file

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