Using a Reader and a Writer, returns a String from an InputStream : InputStream « File « Java Tutorial

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Java Tutorial » File » InputStream 
11. 7. 12. Using a Reader and a Writer, returns a String from an InputStream
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;

/* Copyright (c) 1995-2000, The Hypersonic SQL Group.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of the Hypersonic SQL Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 HYPERSONIC SQL GROUP,
 * 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.
 *
 * This software consists of voluntary contributions made by many individuals
 * on behalf of the Hypersonic SQL Group.
 *
 *
 * For work added by the HSQL Development Group:
 *
 * Copyright (c) 2001-2009, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * 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.
 */

/**
 * Collection of static methods for converting strings between different formats
 * and to and from byte arrays.
 
 
 * Includes some methods based on Hypersonic code as indicated.
 
 @author Thomas Mueller (Hypersonic SQL Group)
 @author Fred Toussi (fredt@users dot sourceforge.net)
 @version 1.9.0
 @since 1.7.2
 */
public class Main {

  private static final byte[] HEXBYTES = { (byte'0'(byte'1'(byte'2'(byte'3',
      (byte'4'(byte'5'(byte'6'(byte'7'(byte'8'(byte'9'(byte'a',
      (byte'b'(byte'c'(byte'd'(byte'e'(byte'f' };


  /**
   * Using a Reader and a Writer, returns a String from an InputStream.
   *
   * Method based on Hypersonic Code
   *
   @param x InputStream to read from
   @throws IOException
   @return a Java string
   */
  public static String inputStreamToString(InputStream x,
          String encodingthrows IOException {

      InputStreamReader in        = new InputStreamReader(x, encoding);
      StringWriter      writer    = new StringWriter();
      int               blocksize = 1024;
      char[]            buffer    = new char[blocksize];

      for (;;) {
          int read = in.read(buffer);

          if (read == -1) {
              break;
          }

          writer.write(buffer, 0, read);
      }

      writer.close();

      return writer.toString();
  }
}
11. 7. InputStream
11. 7. 1. Creating an input or output stream on a ByteBuffer
11. 7. 2. Creating a Manifest for a JAR File
11. 7. 3. Convert InputStream to String
11. 7. 4. Compare the contents of two Streams to determine if they are equal or not.
11. 7. 5. Compare two InputStream
11. 7. 6. Counts down from a specified value the number of bytes actually read from the wrapped InputStream.
11. 7. 7. EOLConvertingInputStream: InputStream which converts \r bytes not followed by \n and \n not preceded by \r to \r\n.
11. 7. 8. Minimal InputStream subclass to fetch bytes form a String
11. 7. 9. Read and return the entire contents of the supplied InputStream.
11. 7. 10. Read and return the entire contents of the supplied InputStream. This method always closes the stream when finished reading.
11. 7. 11. Reads at most certain bytes from input stream and returns them as a byte array.
11. 7. 12. Using a Reader and a Writer, returns a String from an InputStream
11. 7. 13. Write the entire contents of the supplied string to the given stream. This method always flushes and closes the stream when finished.
11. 7. 14. Resettable File InputStream
11. 7. 15. An InputStream class that terminates the stream when it encounters a particular byte sequence.
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