org.springframework.util

Class FileCopyUtils


  • public abstract class FileCopyUtils
    extends Object
    Simple utility methods for file and stream copying. All copy methods use a block size of 4096 bytes, and close all affected streams when done. A variation of the copy methods from this class that leave streams open can be found in StreamUtils.

    Mainly for use within the framework, but also useful for application code.

    Since:
    06.10.2003
    Author:
    Juergen Hoeller
    See Also:
    StreamUtils
    • Field Summary

      Fields  
      Modifier and Type Field and Description
      static int BUFFER_SIZE 
    • Constructor Summary

      Constructors  
      Constructor and Description
      FileCopyUtils() 
    • Constructor Detail

      • FileCopyUtils

        public FileCopyUtils()
    • Method Detail

      • copy

        public static int copy(File in,
               File out)
                        throws IOException
        Copy the contents of the given input File to the given output File.
        Parameters:
        in - the file to copy from
        out - the file to copy to
        Returns:
        the number of bytes copied
        Throws:
        IOException - in case of I/O errors
      • copy

        public static void copy(byte[] in,
                File out)
                         throws IOException
        Copy the contents of the given byte array to the given output File.
        Parameters:
        in - the byte array to copy from
        out - the file to copy to
        Throws:
        IOException - in case of I/O errors
      • copyToByteArray

        public static byte[] copyToByteArray(File in)
                                      throws IOException
        Copy the contents of the given input File into a new byte array.
        Parameters:
        in - the file to copy from
        Returns:
        the new byte array that has been copied to
        Throws:
        IOException - in case of I/O errors
      • copy

        public static int copy(InputStream in,
               OutputStream out)
                        throws IOException
        Copy the contents of the given InputStream to the given OutputStream. Closes both streams when done.
        Parameters:
        in - the stream to copy from
        out - the stream to copy to
        Returns:
        the number of bytes copied
        Throws:
        IOException - in case of I/O errors
      • copy

        public static void copy(byte[] in,
                OutputStream out)
                         throws IOException
        Copy the contents of the given byte array to the given OutputStream. Closes the stream when done.
        Parameters:
        in - the byte array to copy from
        out - the OutputStream to copy to
        Throws:
        IOException - in case of I/O errors
      • copyToByteArray

        public static byte[] copyToByteArray(InputStream in)
                                      throws IOException
        Copy the contents of the given InputStream into a new byte array. Closes the stream when done.
        Parameters:
        in - the stream to copy from
        Returns:
        the new byte array that has been copied to
        Throws:
        IOException - in case of I/O errors
      • copy

        public static int copy(Reader in,
               Writer out)
                        throws IOException
        Copy the contents of the given Reader to the given Writer. Closes both when done.
        Parameters:
        in - the Reader to copy from
        out - the Writer to copy to
        Returns:
        the number of characters copied
        Throws:
        IOException - in case of I/O errors
      • copy

        public static void copy(String in,
                Writer out)
                         throws IOException
        Copy the contents of the given String to the given output Writer. Closes the writer when done.
        Parameters:
        in - the String to copy from
        out - the Writer to copy to
        Throws:
        IOException - in case of I/O errors
      • copyToString

        public static String copyToString(Reader in)
                                   throws IOException
        Copy the contents of the given Reader into a String. Closes the reader when done.
        Parameters:
        in - the reader to copy from
        Returns:
        the String that has been copied to
        Throws:
        IOException - in case of I/O errors