Java File to String fileToString(File f)

Description

file To String

License

Open Source License

Declaration

public static String fileToString(File f) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w  ww  .  j a  va  2  s . c  o m
 * Spirit, a study/biosample management tool for research.
 * Copyright (C) 2018 Idorsia Pharmaceuticals Ltd., Hegenheimermattweg 91,
 * CH-4123 Allschwil, Switzerland.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>
 *
 * @author Joel Freyss
 */

import java.io.BufferedReader;

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

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.Reader;

public class Main {
    public static String fileToString(File f) throws IOException {
        return fileToString(f, Integer.MAX_VALUE);
    }

    public static String fileToString(File f, int maxSize) throws IOException {
        try (Reader reader = new BufferedReader(new InputStreamReader(new FileInputStream(f), "UTF-8"))) {
            return readerToString(reader, maxSize);
        }
    }

    public static String readerToString(Reader reader) throws IOException {
        return readerToString(reader, Integer.MAX_VALUE);
    }

    public static String readerToString(Reader reader, int maxSize) throws IOException {
        char[] buf = new char[512];
        int c;
        StringBuilder sb = new StringBuilder();
        while (sb.length() < maxSize
                && (c = reader.read(buf, 0, Math.min(buf.length, maxSize - sb.length()))) > 0) {
            sb.append(buf, 0, c);
        }
        String s = sb.toString();

        //Remove BOM
        if (s.startsWith("\uFEFF"))
            s = s.substring(1);
        return s;
    }
}

Related

1. fileToStr(String strInput)
2. fileToStream(File source, OutputStream target)
3. fileToStream(final File file)
4. fileToStream(String filename)
5. fileToString(File f)
6. fileToString(File f)
7. fileToString(File f)
8. fileToString(File f)