Mega Code Archive
Read string from InputStream and Reader
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/*
* $RCSfile: StringIO.java,v $
*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
* $Revision: 1.4 $
* $Date: 2007/02/09 17:20:42 $
* $State: Exp $
*/
import java.io.IOException;
import java.io.File;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
/**
* Utility class with static methods to read the entire contents of a
* file, URL, InputStream, or Reader into a single String that is
* returned to the user.
*
* @since Java 3D 1.4
*/
public class StringIO {
/**
* Read the entire contents of the specified file and return a
* single String object containing the contents of the file.
*
* @param fileName the name of the file from which to read
*
* @return a String containing the contents of the input file
*
* @throws IOException if the specified file cannot be opened, or
* if an I/O error occurs while reading the file
*/
public static String readFully(String fileName) throws IOException {
return readFully(new File(fileName));
}
/**
* Read the entire contents of the specified file and return a
* single String object containing the contents of the file.
* This method does not return until the end of the input file
* is reached.
*
* @param file a File from which to read
*
* @return a String containing the contents of the input file
*
* @throws IOException if the specified file cannot be opened, or
* if an I/O error occurs while reading the file
*/
public static String readFully(File file) throws IOException {
return readFully(new FileReader(file));
}
/**
* Read the entire contents of the specified URL and return a
* single String object containing the contents of the URL.
* This method does not return until an end of stream is reached
* for the URL.
*
* @param url a URL from which to read
*
* @return a String containing the contents of the input URL
*
* @throws IOException if the specified URL cannot be opened, or
* if an I/O error occurs while reading the URL
*/
public static String readFully(URL url) throws IOException {
return readFully(url.openStream());
}
/**
* Read the entire contents of the specified InputStream and return a
* single String object containing the contents of the InputStream.
* This method does not return until the end of the input
* stream is reached.
*
* @param stream an InputStream from which to read
*
* @return a String containing the contents of the input stream
*
* @throws IOException if an I/O error occurs while reading the input stream
*/
public static String readFully(InputStream stream) throws IOException {
return readFully(new InputStreamReader(stream));
}
/**
* Read the entire contents of the specified Reader and return a
* single String object containing the contents of the InputStream.
* This method does not return until the end of the input file or
* stream is reached.
*
* @param reader a Reader from which to read
*
* @return a String containing the contents of the stream
*
* @throws IOException if an I/O error occurs while reading the input stream
*/
public static String readFully(Reader reader) throws IOException {
char[] arr = new char[8*1024]; // 8K at a time
StringBuffer buf = new StringBuffer();
int numChars;
while ((numChars = reader.read(arr, 0, arr.length)) > 0) {
buf.append(arr, 0, numChars);
}
return buf.toString();
}
/**
* Do not construct an instance of this class.
*/
private StringIO() {
}
}
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