clojure.java.io/copy

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Type: function Added: Clojure 1.2 Examples: 3 Runnable: 0

([input output & opts])

Copies input to output. Returns nil or throws IOException. Input may be an InputStream, Reader, File, byte[], char[], or String. Output may be an OutputStream, Writer, or File.

Options are key/value pairs and may be one of

:buffer-size  buffer size to use, default is 1024.
:encoding     encoding to use if converting between
              byte and char streams.

Does not close any streams except those it opens itself (on a File).

Examples

by devn on 2011-05-27 . May have evaluation errors. ▶

(ns your-project (:require [clojure.java.io :as io])) (defn copy-file [source-path dest-path] (io/copy (io/file source-path) (io/file dest-path))) (copy-file "/home/username/squirrel.txt" "/home/username/burt-reynolds.txt") ;; Or, after extending the related multimethod: (defmethod @#'io/do-copy [String String] [in out opts] (apply io/copy (io/file in) (io/file out) opts)) (io/copy "/home/username/squirrel.txt" "/home/username/burt-reynolds.txt")

by Hindol on 2019-12-23 . May have evaluation errors. ▶

;; Can be used to save a URL to disk. See: https://stackoverflow.com/a/19297746/1019491 (defn copy-uri-to-file [uri file] (with-open [in (clojure.java.io/input-stream uri) out (clojure.java.io/output-stream file)] (clojure.java.io/copy in out)))

by wedesoft on 2023-02-11 . May have evaluation errors. ▶

;; Concatenate two files. (with-open [out (clojure.java.io/output-stream "output.txt")] (clojure.java.io/copy (clojure.java.io/file "input1.txt") out) (clojure.java.io/copy (clojure.java.io/file "input2.txt") out))

See also

• clojure.java.io/file (0)

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