Java FileInputStream Read readFile(File file)

Description

Reads the content of a file (fully)

License

Open Source License

Parameter

Parameter	Description
file	file to retrieve the content from

Exception

Parameter	Description
Exception	an exception

Return

content of the file as a byte array

Declaration

public static byte[] readFile(File file) throws IOException 

Method Source Code

//package com.java2s;
/******************************************************************************
 *                                     __                                     *
 *                              <-----/@@\----->                              *
 *                             <-< <  \\//  > >->                             *
 *                               <-<-\ __ /->->                               *
 *                               Data /  \ Crow                               *
 *                                   ^    ^                                   *
 *                       (c) 2003 The Data Crow team                          *
 *                              info@datacrow.net                             *
 *                                                                            *
 *                                                                            *
 *       This library is free software; you can redistribute it and/or        *
 *        modify it under the terms of the GNU Lesser General Public          *
 *       License as published by the Free Software Foundation; either         *
 *     version 2.1 of the License, or (at your option) any later version.     *
 *                                                                            *
 *      This library 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       *
 *           Lesser General Public License for more details.                  *
 *                                                                            *
 *     You should have received a copy of the GNU Lesser General Public       *
 *    License along with this library; if not, write to the Free Software     *
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA   *
 *                                                                            *
 ******************************************************************************/

import java.io.BufferedInputStream;

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

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

public class Main {
    /**//  w w  w. java2  s  .  c  o m
     * Reads the content of a file (fully)
     * @param file file to retrieve the content from
     * @return content of the file as a byte array
     * @throws Exception
     */
    public static byte[] readFile(File file) throws IOException {
        InputStream is = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(is);

        long length = file.length();
        if (length > Integer.MAX_VALUE) {
            bis.close();
            throw new IOException("File is too large to read " + file.getName());
        }

        byte[] bytes = new byte[(int) length];

        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length && (numRead = bis.read(bytes, offset, bytes.length - offset)) >= 0)
            offset += numRead;

        bis.close();
        is.close();

        // Ensure all the bytes have been read in
        if (offset < bytes.length) {
            throw new IOException("Could not completely read file " + file.getName());
        }

        return bytes;
    }

    public static String getName(String firstname, String lastname) {
        firstname = firstname == null ? "" : firstname.trim();
        lastname = lastname == null ? "" : lastname.trim();
        return (firstname + " " + lastname).trim();
    }
}

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