Java FileInputStream Read readFileAsInputStream(String fileName)

Description

Reads the file corresponding to the passed file name.

License

Open Source License

Parameter

Parameter	Description
fileName	The name of the file to read.

Exception

Parameter	Description
IOException	If we cannot read the file or create a stream.

Return

See above.

Declaration

public static InputStream readFileAsInputStream(String fileName) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w  w w  .  j  a  v a  2 s .c o  m
 * org.openmicroscopy.shoola.util.file.IOUtil 
 *
 *------------------------------------------------------------------------------
 *  Copyright (C) 2006-2015 University of Dundee. All rights reserved.
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *------------------------------------------------------------------------------
 */

import java.io.BufferedInputStream;

import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Reads the file corresponding to the passed file name. Returns
     * the input stream or <code>null</code> if the file doesn't exist.
     * 
     * @param fileName The name of the file to read.
     * @return See above.
     * @throws IOException If we cannot read the file or create a stream.
     */
    public static InputStream readFileAsInputStream(String fileName) throws IOException {
        if (fileName == null)
            throw new IllegalArgumentException("No file name specified.");
        File f = new File(fileName);
        FileInputStream input = null;
        try {
            input = new FileInputStream(f);
            return new BufferedInputStream(input);
        } catch (Exception e) {
            if (input != null)
                input.close();
            throw new IOException("Cannot read the file " + fileName + ". " + "Error: " + e.getMessage());
        }
    }
}

Related

1. readFile(String pPathToFile)
2. readFile(String resource)
3. readFile(String sFileName)
4. readFileAsBinary(File file)
5. readFileAsInputStream(File file)
6. readFileAsProperties(File file)
7. readFileAsResource(String fileName)
8. ReadFileAsUtf8String(String filePath)
9. readFileAtOnce(final File file)