java.lang.Object
- org.springframework.util.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, FileSystemUtils

Field Summary
Fields
Modifier and Type Field Description
static int BUFFER_SIZE
The default buffer size used when copying bytes.

Constructor Summary
Constructors
Constructor Description
FileCopyUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`copy(byte[] in, File out)`	Copy the contents of the given byte array to the given output File.
`static void`	`copy(byte[] in, OutputStream out)`	Copy the contents of the given byte array to the given OutputStream.
`static int`	`copy(File in, File out)`	Copy the contents of the given input File to the given output File.
`static int`	`copy(InputStream in, OutputStream out)`	Copy the contents of the given InputStream to the given OutputStream.
`static int`	`copy(Reader in, Writer out)`	Copy the contents of the given Reader to the given Writer.
`static void`	`copy(String in, Writer out)`	Copy the contents of the given String to the given Writer.
`static byte[]`	`copyToByteArray(File in)`	Copy the contents of the given input File into a new byte array.
`static byte[]`	`copyToByteArray(InputStream in)`	Copy the contents of the given InputStream into a new byte array.
`static String`	`copyToString(Reader in)`	Copy the contents of the given Reader into a String.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - BUFFER_SIZE
```
public static final int BUFFER_SIZE
```
    The default buffer size used when copying bytes.
    See Also:
    Constant Field Values
- 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 (may be null or empty)
    Returns:
    the new byte array that has been copied to (possibly empty)
    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 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 (may be null or empty)
    Returns:
    the String that has been copied to (possibly empty)
    Throws:
    IOException - in case of I/O errors

Class FileCopyUtils

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BUFFER_SIZE

Constructor Detail

FileCopyUtils

Method Detail

copy

copy

copyToByteArray

copy

copy

copyToByteArray

copy

copy

copyToString