Scala中java.io.InputStream的替代品吗？

Question

I am designing an API where one of the methods needs to provide a way to get file content.

I do not want the method to return a file location as potentially files will be stored in the database. I also do not want to return file content as Array[Byte] as the files can be quite big.

In Java I would create a method that returns an InputStream.

What is the recommended way of doing it in Scala?

Answer 1

在Scala中推荐的方法是使用InputStream而不是重新发明轮子。

Answer 2

Scala doesn't really have much in the way of I/O. You could return a Scala.io.Source , which is really a wrapper around InputStream (as pretty much anything will have to be, since that's all any JVM program has access to).

There's an interesting Scala I/O library, not a standard library, based on Java 7 stuff, iirc. And there's Scalaz Stream, which is the best thing out there, though it still uses an InputStream under the covers if you are handling files.