MD5 (onecode-common-client 1.1.1 API)

java.lang.Object
- com.ds.common.md5.MD5

```
public class MD5
extends Object
```
MD5 hash generator. More information about this class is available from ostermiller.org.
This class takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given pre-specified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.
For more information see RFC1321.

从以下版本开始:

ostermillerutils 1.00.00

作者:

Santeri Paavolainen http://santtu.iki.fi/md5/, Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities

另请参阅:

MD5OutputStream, MD5InputStream

构造器概要

构造器
构造器和说明

MD5()
Class constructor

构造器
构造器和说明
`MD5()` Class constructor

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`byte[]`	`getHash()` Gets this hash sum as an array of 16 bytes.
`static byte[]`	`getHash(byte[] b)` Gets the MD5 hash of the given byte array.
`static byte[]`	`getHash(File f)` Gets the MD5 hash of the given file.
`static byte[]`	`getHash(InputStream in)` Gets the MD5 hash the data on the given InputStream.
`static byte[]`	`getHash(String s)` Gets the MD5 hash of the given String.
`static byte[]`	`getHash(String s, String enc)` Gets the MD5 hash of the given String.
`String`	`getHashString()` Returns 32-character hex representation of this hash.
`static String`	`getHashString(byte[] b)` Gets the MD5 hash of the given byte array.
`static String`	`getHashString(File f)` Gets the MD5 hash of the given file.
`static String`	`getHashString(InputStream in)` Gets the MD5 hash the data on the given InputStream.
`static String`	`getHashString(String s)` Gets the MD5 hash of the given String.
`static String`	`getHashString(String s, String enc)` Gets the MD5 hash of the given String.
`static void`	`main(String[] args)` Command line program that will take files as arguments and output the MD5 sum for each file.
`void`	`reset()` Reset the MD5 sum to its initial state.
`String`	`toString()` Returns 32-character hex representation of this hash.
`void`	`update(byte b)` Updates this hash with a single byte.
`void`	`update(byte[] buffer)` Update this hash with the given data.
`void`	`update(byte[] buffer, int length)` Update this hash with the given data.
`void`	`update(byte[] buffer, int offset, int length)` Update this hash with the given data.
`void`	`update(String s)` Update this hash with a String.
`void`	`update(String s, String enc)` Update this hash with a String.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - MD5
```
public MD5()
```
    Class constructor
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
- 方法详细资料
  - main
```
public static void main(String[] args)
```
    Command line program that will take files as arguments and output the MD5 sum for each file.
    
    参数:
    
    args - command line arguments
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public byte[] getHash()
```
    Gets this hash sum as an array of 16 bytes.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public String getHashString()
```
    Returns 32-character hex representation of this hash.
    
    返回:
    
    String representation of this object's hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public static byte[] getHash(byte[] b)
```
    Gets the MD5 hash of the given byte array.
    
    参数:
    
    b - byte array for which an MD5 hash is desired.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public static String getHashString(byte[] b)
```
    Gets the MD5 hash of the given byte array.
    
    参数:
    
    b - byte array for which an MD5 hash is desired.
    
    返回:
    
    32-character hex representation the data's MD5 hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public static byte[] getHash(InputStream in)
                      throws IOException
```
    Gets the MD5 hash the data on the given InputStream.
    
    参数:
    
    in - byte array for which an MD5 hash is desired.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    抛出:
    
    IOException - if an I/O error occurs.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public static String getHashString(InputStream in)
                            throws IOException
```
    Gets the MD5 hash the data on the given InputStream.
    
    参数:
    
    in - byte array for which an MD5 hash is desired.
    
    返回:
    
    32-character hex representation the data's MD5 hash.
    
    抛出:
    
    IOException - if an I/O error occurs.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public static byte[] getHash(File f)
                      throws IOException
```
    Gets the MD5 hash of the given file.
    
    参数:
    
    f - file for which an MD5 hash is desired.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    抛出:
    
    IOException - if an I/O error occurs.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public static String getHashString(File f)
                            throws IOException
```
    Gets the MD5 hash of the given file.
    
    参数:
    
    f - file array for which an MD5 hash is desired.
    
    返回:
    
    32-character hex representation the data's MD5 hash.
    
    抛出:
    
    IOException - if an I/O error occurs.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public static byte[] getHash(String s)
```
    Gets the MD5 hash of the given String. The string is converted to bytes using the current platform's default character encoding.
    
    参数:
    
    s - String for which an MD5 hash is desired.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public static String getHashString(String s)
```
    Gets the MD5 hash of the given String. The string is converted to bytes using the current platform's default character encoding.
    
    参数:
    
    s - String for which an MD5 hash is desired.
    
    返回:
    
    32-character hex representation the data's MD5 hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHash
```
public static byte[] getHash(String s,
                             String enc)
                      throws UnsupportedEncodingException
```
    Gets the MD5 hash of the given String.
    
    参数:
    
    s - String for which an MD5 hash is desired.
    
    enc - The name of a supported character encoding.
    
    返回:
    
    Array of 16 bytes, the hash of all updated bytes.
    
    抛出:
    
    UnsupportedEncodingException - If the named encoding is not supported.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - getHashString
```
public static String getHashString(String s,
                                   String enc)
                            throws UnsupportedEncodingException
```
    Gets the MD5 hash of the given String.
    
    参数:
    
    s - String for which an MD5 hash is desired.
    
    enc - The name of a supported character encoding.
    
    返回:
    
    32-character hex representation the data's MD5 hash.
    
    抛出:
    
    UnsupportedEncodingException - If the named encoding is not supported.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - reset
```
public void reset()
```
    Reset the MD5 sum to its initial state.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - toString
```
public String toString()
```
    Returns 32-character hex representation of this hash.
    
    覆盖:
    
    toString 在类中 Object
    
    返回:
    
    String representation of this object's hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(byte[] buffer,
                   int offset,
                   int length)
```
    Update this hash with the given data.
    If length bytes are not available to be hashed, as many bytes as possible will be hashed.
    
    参数:
    
    buffer - Array of bytes to be hashed.
    
    offset - Offset to buffer array.
    
    length - number of bytes to hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(byte[] buffer,
                   int length)
```
    Update this hash with the given data.
    If length bytes are not available to be hashed, as many bytes as possible will be hashed.
    
    参数:
    
    buffer - Array of bytes to be hashed.
    
    length - number of bytes to hash.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(byte[] buffer)
```
    Update this hash with the given data.
    
    参数:
    
    buffer - Array of bytes to be hashed.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(byte b)
```
    Updates this hash with a single byte.
    
    参数:
    
    b - byte to be hashed.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(String s)
```
    Update this hash with a String. The string is converted to bytes using the current platform's default character encoding.
    
    参数:
    
    s - String to be hashed.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00
  - update
```
public void update(String s,
                   String enc)
            throws UnsupportedEncodingException
```
    Update this hash with a String.
    
    参数:
    
    s - String to be hashed.
    
    enc - The name of a supported character encoding.
    
    抛出:
    
    UnsupportedEncodingException - If the named encoding is not supported.
    
    从以下版本开始:
    
    ostermillerutils 1.00.00

类 MD5

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

MD5

方法详细资料

main

getHash

getHashString

getHash

getHashString

getHash

getHashString

getHash

getHashString

getHash

getHashString

getHash

getHashString

reset

toString

update

update

update

update

update

update