java java中的内存文件系统
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In-memory file system in java
提问by alle3x
I want to create a simple in-memory file system in Java, which has one root directory and is able to make new sub directory. In the directory we can make new files, write in them, read from them, delete them and also rename them. Can you please give some advice from where to start (a simple code, or resouce).
我想在 Java 中创建一个简单的内存文件系统，它有一个根目录并且能够创建新的子目录。在目录中，我们可以创建新文件、写入它们、读取它们、删除它们以及重命名它们。你能从哪里开始给出一些建议吗（一个简单的代码或资源）。
回答by Raj
A custom file system provider must implement the java.nio.file.spi.FileSystemProvider class. A file system provider is identified by a URI scheme such as file, jar, memory, cd.
自定义文件系统提供程序必须实现 java.nio.file.spi.FileSystemProvider 类。文件系统提供程序由 URI 方案标识，例如文件、jar、内存、cd。
These links below provide good starting info
下面的这些链接提供了很好的入门信息
http://docs.oracle.com/javase/7/docs/technotes/guides/io/fsp/filesystemprovider.html
http://docs.oracle.com/javase/7/docs/technotes/guides/io/fsp/filesystemprovider.html
The link below(not about in memory file system) is about virtual file system. It talks about some design issues which could help you in case you decide to create your own file system.
下面的链接（不是关于内存文件系统）是关于虚拟文件系统的。它讨论了一些设计问题，如果您决定创建自己的文件系统，这些问题可以帮助您。
http://www.flipcode.com/archives/Programming_a_Virtual_File_System-Part_I.shtml
http://www.flipcode.com/archives/Programming_a_Virtual_File_System-Part_I.shtml
But you could always use already built and tested code.This will be faster and easier to maintain and you will receive support in error conditions.
但是您始终可以使用已经构建和测试过的代码。这将更快、更容易维护，并且您将在错误情况下获得支持。
Take a look at jimfs ( An in-memory file system for Java 7+ )
看看 jimfs（Java 7+ 的内存文件系统）
https://github.com/google/jimfs
https://github.com/google/jimfs
Also look into
也看看
Commons Virtual File Systemhttp://commons.apache.org/proper/commons-vfs/
公共虚拟文件系统http://commons.apache.org/proper/commons-vfs/
marschall (An in memory implementation of a JSR-203 file system)https://github.com/marschall/memoryfilesystem
marschall（JSR-203 文件系统的内存实现）https://github.com/marschall/memoryfilesystem
回答by Reena Upadhyay
You can create In-memory file system in java using Google's Jimfs and java 7 NIO package.
您可以使用 Google 的 Jimfs 和 java 7 NIO 包在 java 中创建内存文件系统。
Please refer this link. Here you will get a sample tutorial: create In-memory file system in java
请参考这个链接。在这里你会得到一个示例教程： 在java中创建内存文件系统
回答by fge
Use memoryfilesystem.
使用内存文件系统。
Jimfs has been mentioned in a previous answer, but memoryfilesystem handles much more.
Jimfs 在之前的回答中已经提到过，但是 memoryfilesystem 处理的更多。
Example usage:
用法示例：
final FileSystem fs = MemoryFileSystem.newLinux().build("myfs");
final Path dir = fs.getPath("thedir");
Files.createDirectory(dir);
etc etc. Use the java.nio.file API to manipulate files in this (Filewon't work!). See herefor more details.
等等等等。使用 java.nio.file API 来操作这里的文件（File不会工作！）。请参阅此处了解更多详情。
