org.apache.commons.compress.utils

Class IOUtils



  • public final class IOUtilsextends Object
    Utility functions
    This class is immutable
    (has mutable data but it is write-only)
    • Method Detail

      • copy

        public static long copy(InputStream input,        OutputStream output)                 throws IOException
        Copies the content of a InputStream into an OutputStream. Uses a default buffer size of 8024 bytes.
        Parameters:
        input - the InputStream to copy
        output - the target Stream
        Returns:
        the number of bytes copied
        Throws:
        IOException - if an error occurs
      • copy

        public static long copy(InputStream input,        OutputStream output,        int buffersize)                 throws IOException
        Copies the content of a InputStream into an OutputStream
        Parameters:
        input - the InputStream to copy
        output - the target Stream
        buffersize - the buffer size to use
        Returns:
        the number of bytes copied
        Throws:
        IOException - if an error occurs
      • skip

        public static long skip(InputStream input,        long numToSkip)                 throws IOException
        Skips the given number of bytes by repeatedly invoking skip on the given input stream if necessary.

        In a case where the stream's skip() method returns 0 before the requested number of bytes has been skip this implementation will fall back to using the read() method.

        This method will only skip less than the requested number of bytes if the end of the input stream has been reached.

        Parameters:
        input - stream to skip bytes in
        numToSkip - the number of bytes to skip
        Returns:
        the number of bytes actually skipped
        Throws:
        IOException - on error
      • readFully

        public static int readFully(InputStream input,            byte[] b)                     throws IOException
        Reads as much from input as possible to fill the given array.

        This method may invoke read repeatedly to fill the array and only read less bytes than the length of the array if the end of the stream has been reached.

        Parameters:
        input - stream to read from
        b - buffer to fill
        Returns:
        the number of bytes actually read
        Throws:
        IOException - on error
      • readFully

        public static int readFully(InputStream input,            byte[] b,            int offset,            int len)                     throws IOException
        Reads as much from input as possible to fill the given array with the given amount of bytes.

        This method may invoke read repeatedly to read the bytes and only read less bytes than the requested length if the end of the stream has been reached.

        Parameters:
        input - stream to read from
        b - buffer to fill
        offset - offset into the buffer to start filling at
        len - of bytes to read
        Returns:
        the number of bytes actually read
        Throws:
        IOException - if an I/O error has occurred
      • toByteArray

        public static byte[] toByteArray(InputStream input)                          throws IOException
        Gets the contents of an InputStream as a byte[].

        This method buffers the input internally, so there is no need to use a BufferedInputStream.

        Parameters:
        input - the InputStream to read from
        Returns:
        the requested byte array
        Throws:
        NullPointerException - if the input is null
        IOException - if an I/O error occurs
        Since:
        1.5
      • closeQuietly

        public static void closeQuietly(Closeable c)
        Closes the given Closeable and swallows any IOException that may occur.
        Parameters:
        c - Closeable to close, can be null
        Since:
        1.7

Copyright © 2016 The Apache Software Foundation. All rights reserved.



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