Java Convert via ByteBuffer toString(Reader reader)

Description

to String

License

Apache License

Declaration

public static String toString(Reader reader) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringWriter;

import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public class Main {
    public static String toString(Reader reader) throws IOException {
        StringWriter sw = new StringWriter();
        copyStream(reader instanceof BufferedReader ? (BufferedReader) reader : new BufferedReader(reader),
                new BufferedWriter(sw));
        return sw.toString();
    }//from  w ww. j a  va 2  s  .co  m

    public static void copyStream(BufferedReader reader, BufferedWriter writer) throws IOException {
        String line = null;
        while ((line = reader.readLine()) != null) {
            writer.write(line);
        }
        writer.flush();
    }

    public static void copyStream(final ReadableByteChannel src, final WritableByteChannel dest)
            throws IOException {
        final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);

        while (src.read(buffer) != -1) {
            buffer.flip();
            dest.write(buffer);
            buffer.compact();
        }

        buffer.flip();

        while (buffer.hasRemaining()) {
            dest.write(buffer);
        }
    }

    public static void copyStream(InputStream in, OutputStream out) throws IOException {
        final ReadableByteChannel inputChannel = Channels.newChannel(in);
        final WritableByteChannel outputChannel = Channels.newChannel(out);
        copyStream(inputChannel, outputChannel);
    }
}

Related

1. toString(final String filename)
2. toString(final Xid xid)
3. toString(InputStream is)
4. toString(Object o)
5. toString(Reader r)
6. toText(@Nonnull byte[] bytes)
7. toThriftBinary(UUID uuid)
8. toURI(String value)
9. toUTF(byte[] bytes)