Example usage for java.io InputStream read

Introduction

In this page you can find the example usage for java.io InputStream read.

Prototype

public int read(byte b[], int off, int len) throws IOException

Source Link

Document

Reads up to len bytes of data from the input stream into an array of bytes.

Usage

From source file:Main.java

/**
 * This method copies data from input stream to output stream.
 * //from w w  w  .j  a  v  a2s.  co  m
 * @param is
 * @param os
 */
public static void CopyStream(InputStream is, OutputStream os) {
    final int buffer_size = 1024;
    try {
        byte[] bytes = new byte[buffer_size];
        for (;;) {
            int count = is.read(bytes, 0, buffer_size);
            if (count == -1)
                break;
            os.write(bytes, 0, count);
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:Main.java

public static byte[] readBytes(InputStream is, long count) throws IOException {
    byte[] bytes = new byte[(int) count];

    int start = 0;

    do {//from   ww w. jav a  2s .  c  om
        int read = is.read(bytes, start, (int) count);

        // If we're at EOF, but trying to read the first set of bytes, return null
        if (read == -1) {
            if (start > 0) {
                throw new EOFException();
            }

            return null;
        }

        start += read;
        count -= read;
    } while (count > 0);

    return bytes;
}

From source file:Main.java

static private byte[] readBytesFromStream(InputStream input) throws IOException {

    ByteArrayOutputStream buffer = new ByteArrayOutputStream();

    int nRead;//  www .  j a va 2s  .c o  m
    byte[] data = new byte[16384];

    while ((nRead = input.read(data, 0, data.length)) != -1) {
        buffer.write(data, 0, nRead);
    }

    buffer.flush();
    input.close();
    return buffer.toByteArray();
}

From source file:Main.java

public static byte[] InputStream2Bytes(InputStream is) {
    String str = "";
    byte[] readByte = new byte[1024];
    @SuppressWarnings("unused")
    int readCount = -1;
    try {//w  w  w  .  j a  v a  2s.co m
        while ((readCount = is.read(readByte, 0, 1024)) != -1) {
            str += new String(readByte).trim();
        }
        return str.getBytes();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

/** 
 * Reads bytes from the specified inputstream into the specified target buffer until it is filled up     
 *///from   w w w . java  2 s .co m
public static void readBytesUntilFull(InputStream in, byte[] targetBuffer) throws IOException {
    int totalBytesRead = 0;
    int read;
    final int targetBytes = targetBuffer.length;
    do {
        read = in.read(targetBuffer, totalBytesRead, (targetBytes - totalBytesRead));
        if (read != -1) {
            totalBytesRead += read;
        } else {
            throw new IOException("Unexpected EOF reached before read buffer was filled");
        }
    } while (totalBytesRead < targetBytes);
}

From source file:Main.java

public static int upZipFile(File zipFile, String folderPath) throws IOException {
    ZipFile zfile = new ZipFile(zipFile);
    Enumeration zList = zfile.entries();
    ZipEntry ze = null;/*from w  w w  .j  av  a  2s.com*/
    byte[] buf = new byte[1024];
    while (zList.hasMoreElements()) {
        ze = (ZipEntry) zList.nextElement();
        if (ze.isDirectory()) {
            String dirstr = folderPath + ze.getName();
            dirstr = new String(dirstr.getBytes("8859_1"), "GB2312");
            File f = new File(dirstr);
            f.mkdirs();
            continue;
        }
        OutputStream os = new BufferedOutputStream(
                new FileOutputStream(getRealFileName(folderPath, ze.getName())));
        InputStream is = new BufferedInputStream(zfile.getInputStream(ze));
        int readLen = 0;
        while ((readLen = is.read(buf, 0, 1024)) != -1) {
            os.write(buf, 0, readLen);
        }
        is.close();
        os.close();
    }
    zfile.close();
    return 0;
}

From source file:Main.java

public static byte[] inputStreamToByte(InputStream in) throws IOException {

    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    byte[] data = new byte[BUFFER_SIZE];
    int count = -1;
    while ((count = in.read(data, 0, BUFFER_SIZE)) != -1)
        outStream.write(data, 0, count);

    data = null;//from  w  ww.  j a v  a2  s .  co m
    return outStream.toByteArray();
}

From source file:Main.java

public static byte[] InputStreamTOByteArray(InputStream in) throws IOException {
    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    int count = -1;
    byte[] data = new byte[BUFFER_SIZE];
    while ((count = in.read(data, 0, BUFFER_SIZE)) != -1) {
        outStream.write(data, 0, count);
    }//from ww  w  .j ava 2 s . c  o  m
    data = null;
    outStream.close();
    return outStream.toByteArray();

}

From source file:Main.java

public static void copyStream(InputStream is, OutputStream os) {
    final int buffer_size = 1024;

    try {//from   ww w .j  a  v a 2s .c  o  m

        byte[] bytes = new byte[buffer_size];

        for (;;) {

            int count = is.read(bytes, 0, buffer_size);
            if (count == -1) {
                break;
            }

            os.write(bytes, 0, count);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

/**
 * Converts an {@link InputStream} to byte[].
 * // w ww  .  j a  v  a 2s .com
 * @param is
 *            - an {@link InputStream}
 * 
 * @return
 * 
 * @throws IOException
 */
public static byte[] toByteArray(InputStream is) throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    int nRead;
    byte[] data = new byte[16384];
    while ((nRead = is.read(data, 0, data.length)) != -1) {
        buffer.write(data, 0, nRead);
    }
    buffer.flush();
    return buffer.toByteArray();

}