Is it possible to create a File object from InputStream

Question

Is there any way to create a java io File object from an java io InputStream    My requirement is reading the File from a RAR   I am not trying to write a temporary File  I have a file inside RAR archive which I am trying to read

User · Answer

If you are using Java version 7 or higher  you can use try-with-resources to properly close the FileOutputStream  The following code use IOUtils copy   from commons-io   public void copyToFile InputStream inputStream  File file  throws IOException       try OutputStream outputStream   new FileOutputStream file             IOUtils copy inputStream  outputStream

User · Answer

In one line    FileUtils copyInputStreamToFile inputStream  file      org apache commons io

User · Answer

Easy Java 9 solution with try with resources block public static void copyInputStreamToFile InputStream input  File file           try  OutputStream output   new FileOutputStream file             input transferTo output         catch  IOException ioException            ioException printStackTrace              java io InputStream transferTo is available since Java 9

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If you do not want to use other library  here is a simple function to convert InputStream to OutputStream   public static void copyStream InputStream in  OutputStream out  throws IOException       byte   buffer   new byte 1024       int read      while   read   in read buffer      -1            out write buffer  0  read             Now you can easily write an Inputstream into file by using FileOutputStream-  FileOutputStream out   new FileOutputStream outFile   copyStream  inputStream  out   out close

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Since Java 7  you can do it in one line even without using any external libraries   Files copy inputStream  outputPath  StandardCopyOption REPLACE EXISTING     See the API docs

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Create a temp file first   File tempFile   File createTempFile prefix  suffix   tempFile deleteOnExit    FileOutputStream out   new FileOutputStream tempFile   IOUtils copy in  out   return tempFile

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You need to create new file and copy contents from InputStream to that file   File file         try OutputStream outputStream   new FileOutputStream file        IOUtils copy inputStream  outputStream     catch  FileNotFoundException e           handle exception here   catch  IOException e           handle exception here     I am using convenient IOUtils copy   to avoid manual copying of streams  Also it has built-in buffering

[java] Is it possible to create a File object from InputStream

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