hex.html

java编码的一个开发包

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<A NAME="Hex()"><!-- --></A><H3>
Hex</H3>
<PRE>
public <B>Hex</B>()</PRE>
<DL>
</DL>

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<A NAME="decodeHex(char[])"><!-- --></A><H3>
decodeHex</H3>
<PRE>
public static byte[] <B>decodeHex</B>(char[]&nbsp;data)
                        throws <A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></PRE>
<DL>
<DD>Converts an array of characters representing hexidecimal values into an
 array of bytes of those same values. The returned array will be half the
 length of the passed array, as it takes two characters to represent any
 given byte. An exception is thrown if the passed char array has an odd
 number of elements.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - An array of characters containing hexidecimal digits
<DT><B>Returns:</B><DD>A byte array containing binary data decoded from
         the supplied char array.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></CODE> - Thrown if an odd number or illegal of characters 
         is supplied</DL>
</DD>
</DL>
<HR>

<A NAME="toDigit(char, int)"><!-- --></A><H3>
toDigit</H3>
<PRE>
protected static int <B>toDigit</B>(char&nbsp;ch,
                             int&nbsp;index)
                      throws <A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></PRE>
<DL>
<DD>Converts a hexadecimal character to an integer.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ch</CODE> - A character to convert to an integer digit<DD><CODE>index</CODE> - The index of the character in the source
<DT><B>Returns:</B><DD>An integer
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></CODE> - Thrown if ch is an illegal hex character</DL>
</DD>
</DL>
<HR>

<A NAME="encodeHex(byte[])"><!-- --></A><H3>
encodeHex</H3>
<PRE>
public static char[] <B>encodeHex</B>(byte[]&nbsp;data)</PRE>
<DL>
<DD>Converts an array of bytes into an array of characters representing the hexidecimal values of each byte in order.
 The returned array will be double the length of the passed array, as it takes two characters to represent any
 given byte.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - a byte[] to convert to Hex characters
<DT><B>Returns:</B><DD>A char[] containing hexidecimal characters</DL>
</DD>
</DL>
<HR>

<A NAME="decode(byte[])"><!-- --></A><H3>
decode</H3>
<PRE>
public byte[] <B>decode</B>(byte[]&nbsp;array)
              throws <A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></PRE>
<DL>
<DD>Converts an array of character bytes representing hexidecimal values into an
 array of bytes of those same values. The returned array will be half the
 length of the passed array, as it takes two characters to represent any
 given byte. An exception is thrown if the passed char array has an odd
 number of elements.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/codec/BinaryDecoder.html#decode(byte[])">decode</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/codec/BinaryDecoder.html" title="interface in org.apache.commons.codec">BinaryDecoder</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>array</CODE> - An array of character bytes containing hexidecimal digits
<DT><B>Returns:</B><DD>A byte array containing binary data decoded from
         the supplied byte array (representing characters).
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></CODE> - Thrown if an odd number of characters is supplied
                   to this function<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/codec/binary/Hex.html#decodeHex(char[])"><CODE>decodeHex(char[])</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="decode(java.lang.Object)"><!-- --></A><H3>
decode</H3>
<PRE>
public <A HREF="http://java.sun.com/products/jdk/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>decode</B>(<A HREF="http://java.sun.com/products/jdk/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;object)
              throws <A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></PRE>
<DL>
<DD>Converts a String or an array of character bytes representing hexidecimal values into an
 array of bytes of those same values. The returned array will be half the
 length of the passed String or array, as it takes two characters to represent any
 given byte. An exception is thrown if the passed char array has an odd
 number of elements.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/codec/Decoder.html#decode(java.lang.Object)">decode</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/codec/Decoder.html" title="interface in org.apache.commons.codec">Decoder</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>object</CODE> - A String or, an array of character bytes containing hexidecimal digits
<DT><B>Returns:</B><DD>A byte array containing binary data decoded from
         the supplied byte array (representing characters).
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/commons/codec/DecoderException.html" title="class in org.apache.commons.codec">DecoderException</A></CODE> - Thrown if an odd number of characters is supplied
                   to this function or the object is not a String or char[]<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/codec/binary/Hex.html#decodeHex(char[])"><CODE>decodeHex(char[])</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="encode(byte[])"><!-- --></A><H3>
encode</H3>
<PRE>
public byte[] <B>encode</B>(byte[]&nbsp;array)</PRE>
<DL>
<DD>Converts an array of bytes into an array of bytes for the characters representing the
 hexidecimal values of each byte in order. The returned array will be
 double the length of the passed array, as it takes two characters to
 represent any given byte.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/codec/BinaryEncoder.html#encode(byte[])">encode</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/codec/BinaryEncoder.html" title="interface in org.apache.commons.codec">BinaryEncoder</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>array</CODE> - a byte[] to convert to Hex characters
<DT><B>Returns:</B><DD>A byte[] containing the bytes of the hexidecimal characters<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/codec/binary/Hex.html#encodeHex(byte[])"><CODE>encodeHex(byte[])</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="encode(java.lang.Object)"><!-- --></A><H3>
encode</H3>
<PRE>
public <A HREF="http://java.sun.com/products/jdk/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>encode</B>(<A HREF="http://java.sun.com/products/jdk/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;object)
              throws <A HREF="../../../../../org/apache/commons/codec/EncoderException.html" title="class in org.apache.commons.codec">EncoderException</A></PRE>
<DL>
<DD>Converts a String or an array of bytes into an array of characters representing the
 hexidecimal values of each byte in order. The returned array will be
 double the length of the passed String or array, as it takes two characters to
 represent any given byte.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/codec/Encoder.html#encode(java.lang.Object)">encode</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/codec/Encoder.html" title="interface in org.apache.commons.codec">Encoder</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>object</CODE> - a String, or byte[] to convert to Hex characters
<DT><B>Returns:</B><DD>A char[] containing hexidecimal characters
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../org/apache/commons/codec/EncoderException.html" title="class in org.apache.commons.codec">EncoderException</A></CODE> - Thrown if the given object is not a String or byte[]<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/commons/codec/binary/Hex.html#encodeHex(byte[])"><CODE>encodeHex(byte[])</CODE></A></DL>
</DD>
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