Java File to String readFileAsString(String filePath)

Description

read File As String

License

Open Source License

Parameter

Parameter	Description
filePath	the name of the file to open. Not sure if it can accept URLs or just filenames. Path handling could be better, and buffer sizes are hardcoded

Declaration

public static String readFileAsString(String filePath) throws java.io.IOException 

Method Source Code

//package com.java2s;
/*//from w  w  w  .j a va 2s.  c o m
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002. All
 * rights reserved. Software written by Ian F. Darwin and others. $Id:
 * LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer. 2.
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the
 * Java language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully
 * acknowledged.
 */

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

public class Main {
    /**
     * @param filePath
     *            the name of the file to open. Not sure if it can accept URLs
     *            or just filenames. Path handling could be better, and buffer
     *            sizes are hardcoded
     */
    public static String readFileAsString(String filePath) throws java.io.IOException {
        File inFile = new File(filePath);
        BufferedReader reader = new BufferedReader(new FileReader(inFile));

        int cap = (int) inFile.length();
        if (inFile.length() > Integer.MAX_VALUE) {
            cap = Integer.MAX_VALUE;
        }
        StringBuffer fileData = new StringBuffer(cap);
        char[] buf = new char[32 * 1024];
        int numRead = 0;
        while ((numRead = reader.read(buf)) != -1) {
            String readData = String.valueOf(buf, 0, numRead);
            fileData.append(readData);
        }
        reader.close();
        return fileData.toString();
    }
}

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