Class DigestUtils

java.lang.Object

org.springframework.util.DigestUtils

public abstract class DigestUtils
extends Object

Miscellaneous methods for calculating digests.

Mainly for internal use within the framework; consider Apache Commons Codec for a more comprehensive suite of digest utilities.

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller, Craig Andrews

Constructor Summary

Constructors

Constructor	Description
DigestUtils()

Method Summary

Modifier and Type	Method	Description
static StringBuilder	appendMd5DigestAsHex(byte[] bytes, StringBuilder builder)	Append a hexadecimal string representation of the MD5 digest of the given bytes to the given StringBuilder.
static StringBuilder	appendMd5DigestAsHex(InputStream inputStream, StringBuilder builder)	Append a hexadecimal string representation of the MD5 digest of the given inputStream to the given StringBuilder.
static byte[]	md5Digest(byte[] bytes)	Calculate the MD5 digest of the given bytes.
static byte[]	md5Digest(InputStream inputStream)	Calculate the MD5 digest of the given stream.
static String	md5DigestAsHex(byte[] bytes)	Return a hexadecimal string representation of the MD5 digest of the given bytes.
static String	md5DigestAsHex(InputStream inputStream)	Return a hexadecimal string representation of the MD5 digest of the given stream.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DigestUtils

public DigestUtils()

Method Details

md5Digest

public static byte[] md5Digest(byte[] bytes)

Calculate the MD5 digest of the given bytes.

Parameters:

bytes - the bytes to calculate the digest over

Returns:

the digest

md5Digest

public static byte[] md5Digest(InputStream inputStream)
                        throws IOException

Calculate the MD5 digest of the given stream.

This method does not close the input stream.

Parameters:

inputStream - the InputStream to calculate the digest over

Returns:

the digest

Throws:

IOException

Since:

4.2

md5DigestAsHex

public static String md5DigestAsHex(byte[] bytes)

Return a hexadecimal string representation of the MD5 digest of the given bytes.

Parameters:

bytes - the bytes to calculate the digest over

Returns:

a hexadecimal digest string

md5DigestAsHex

public static String md5DigestAsHex(InputStream inputStream)
                             throws IOException

Return a hexadecimal string representation of the MD5 digest of the given stream.

This method does not close the input stream.

Parameters:

inputStream - the InputStream to calculate the digest over

Returns:

a hexadecimal digest string

Throws:

IOException

Since:

4.2

appendMd5DigestAsHex

public static StringBuilder appendMd5DigestAsHex(byte[] bytes,
 StringBuilder builder)

Append a hexadecimal string representation of the MD5 digest of the given bytes to the given StringBuilder.

Parameters:

bytes - the bytes to calculate the digest over

builder - the string builder to append the digest to

Returns:

the given string builder

appendMd5DigestAsHex

public static StringBuilder appendMd5DigestAsHex(InputStream inputStream,
 StringBuilder builder)
                                          throws IOException

Append a hexadecimal string representation of the MD5 digest of the given inputStream to the given StringBuilder.

This method does not close the input stream.

Parameters:

inputStream - the inputStream to calculate the digest over

builder - the string builder to append the digest to

Returns:

the given string builder

Throws:

IOException

Since:

4.2