Java InputStream to OutputStream copyStream(InputStream in, OutputStream out)

Description

copy Stream

License

Apache License

Declaration

public static long copyStream(InputStream in, OutputStream out) throws IOException 

Method Source Code

//package com.java2s;
/*// w  w  w.  j  a v  a 2  s.  c o  m
 * Copyright (C) 2013 salesforce.com, inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;
import java.io.InputStream;

import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;

import java.util.logging.Level;
import java.util.logging.Logger;

public class Main {
    public static long copyStream(InputStream in, OutputStream out) throws IOException {
        return copyStream(in, out, new byte[8192]);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf) throws IOException {
        return copyStream(in, out, buf, null, null);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf, Logger logger, Level level)
            throws IOException {
        return copyStream(in, out, buf, logger, level, true);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf, Logger logger, Level level,
            boolean closeStream) throws IOException {
        return copyStream(in, out, buf, closeStream, logger, level);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf, boolean close, Logger log,
            Level level) throws IOException {
        return copyStream(in, out, buf, close, log, level, Long.MAX_VALUE);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf, boolean closeInputStream)
            throws IOException {
        return copyStream(in, out, buf, closeInputStream, null, null, Long.MAX_VALUE);
    }

    public static long copyStream(InputStream in, OutputStream out, byte[] buf, boolean closeStream, Logger logger,
            Level level, final long numBytesToCopy) throws IOException {
        if (buf == null) {
            buf = new byte[8192];
        }
        try {
            int len;
            long copied = 0;
            while (numBytesToCopy > copied
                    && (len = in.read(buf, 0, (int) Math.min(buf.length, (numBytesToCopy - copied)))) != -1) {
                out.write(buf, 0, len);
                if (logger != null && logger.isLoggable(level)) {
                    logger.log(level, new String(buf, 0, len));
                }
                copied += len;
            }
            if (numBytesToCopy != Long.MAX_VALUE && numBytesToCopy != copied) {
                throw new IOException("expected to copy " + numBytesToCopy + ", actually copied " + copied);
            }
            return copied;
        } finally {
            try {
                out.flush();
            } finally {
                if (closeStream) {
                    in.close();
                }
            }
        }
    }

    public static void copyStream(Reader in, Writer out) throws IOException {
        char[] buf = new char[8192];
        try {
            int len;
            while ((len = in.read(buf)) != -1) {
                out.write(buf, 0, len);
            }
            out.flush();
        } finally {
            in.close();
        }
    }
}

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2. copyStream(InputStream in, File outputFile)
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4. copyStream(InputStream in, OutputStream os)
5. copyStream(InputStream in, OutputStream os)
6. copyStream(InputStream in, OutputStream out)
7. copyStream(InputStream in, OutputStream out)
8. copyStream(InputStream in, OutputStream out)
9. copyStream(InputStream in, OutputStream out)