base64.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#decode(java.lang.String)">decode</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;s)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decodes data from Base64 notation, automatically
 detecting gzip-compressed data and decompressing it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#decodeFromFile(java.lang.String)">decodeFromFile</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;filename)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convenience method for reading a base64-encoded
 file and decoding it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#decodeToFile(java.lang.String, java.lang.String)">decodeToFile</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;dataToDecode,
             <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;filename)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convenience method for decoding data to a file.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#decodeToObject(java.lang.String)">decodeToObject</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;encodedObject)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Attempts to decode Base64 data and deserialize a Java
 Object within. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeBytes(byte[])">encodeBytes</A></B>(byte[]&nbsp;source)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Encodes a byte array into Base64 notation.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeBytes(byte[], int)">encodeBytes</A></B>(byte[]&nbsp;source,
            int&nbsp;options)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Encodes a byte array into Base64 notation.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeBytes(byte[], int, int)">encodeBytes</A></B>(byte[]&nbsp;source,
            int&nbsp;off,
            int&nbsp;len)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Encodes a byte array into Base64 notation.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeBytes(byte[], int, int, int)">encodeBytes</A></B>(byte[]&nbsp;source,
            int&nbsp;off,
            int&nbsp;len,
            int&nbsp;options)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Encodes a byte array into Base64 notation.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeFromFile(java.lang.String)">encodeFromFile</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;filename)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convenience method for reading a binary file
 and base64-encoding it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeObject(java.io.Serializable)">encodeObject</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A>&nbsp;serializableObject)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Serializes an object and returns the Base64-encoded
 version of that serialized object. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeObject(java.io.Serializable, int)">encodeObject</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A>&nbsp;serializableObject,
             int&nbsp;options)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Serializes an object and returns the Base64-encoded
 version of that serialized object. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#encodeToFile(byte[], java.lang.String)">encodeToFile</A></B>(byte[]&nbsp;dataToEncode,
             <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;filename)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Convenience method for encoding data to a file.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ============ FIELD DETAIL =========== -->

<A NAME="field_detail"><!-- --></A>
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="NO_OPTIONS"><!-- --></A><H3>
NO_OPTIONS</H3>
<PRE>
public static final int <B>NO_OPTIONS</B></PRE>
<DL>
<DD>No options specified. Value is zero.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.geotools.data.postgis.attributeio.Base64.NO_OPTIONS">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="ENCODE"><!-- --></A><H3>
ENCODE</H3>
<PRE>
public static final int <B>ENCODE</B></PRE>
<DL>
<DD>Specify encoding.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.geotools.data.postgis.attributeio.Base64.ENCODE">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="DECODE"><!-- --></A><H3>
DECODE</H3>
<PRE>
public static final int <B>DECODE</B></PRE>
<DL>
<DD>Specify decoding.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.geotools.data.postgis.attributeio.Base64.DECODE">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="GZIP"><!-- --></A><H3>
GZIP</H3>
<PRE>
public static final int <B>GZIP</B></PRE>
<DL>
<DD>Specify that data should be gzip-compressed.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.geotools.data.postgis.attributeio.Base64.GZIP">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="DONT_BREAK_LINES"><!-- --></A><H3>
DONT_BREAK_LINES</H3>
<PRE>
public static final int <B>DONT_BREAK_LINES</B></PRE>
<DL>
<DD>Don't break lines when encoding (violates strict Base64 specification)
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../../constant-values.html#org.geotools.data.postgis.attributeio.Base64.DONT_BREAK_LINES">Constant Field Values</A></DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->


<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
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</TABLE>

<A NAME="encodeObject(java.io.Serializable)"><!-- --></A><H3>
encodeObject</H3>
<PRE>
public static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>encodeObject</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A>&nbsp;serializableObject)</PRE>
<DL>
<DD>Serializes an object and returns the Base64-encoded
 version of that serialized object. If the object
 cannot be serialized or there is another error,
 the method will return <tt>null</tt>.
 The object is not GZip-compressed before being encoded.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>serializableObject</CODE> - The object to encode
<DT><B>Returns:</B><DD>The Base64-encoded object<DT><B>Since:</B></DT>
  <DD>1.4</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="encodeObject(java.io.Serializable, int)"><!-- --></A><H3>
encodeObject</H3>
<PRE>
public static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>encodeObject</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A>&nbsp;serializableObject,
                                  int&nbsp;options)</PRE>
<DL>
<DD>Serializes an object and returns the Base64-encoded
 version of that serialized object. If the object
 cannot be serialized or there is another error,
 the method will return <tt>null</tt>.
 <p>
 Valid options:<pre>
   GZIP: gzip-compresses object before encoding it.
   DONT_BREAK_LINES: don't break lines at 76 characters
     <i>Note: Technically, this makes your encoding non-compliant.</i>
 </pre>
 <p>
 Example: <code>encodeObject( myObj, Base64.GZIP )</code> or
 <p>
 Example: <code>encodeObject( myObj, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>serializableObject</CODE> - The object to encode<DD><CODE>options</CODE> - Specified options
<DT><B>Returns:</B><DD>The Base64-encoded object<DT><B>Since:</B></DT>
  <DD>2.0</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#GZIP"><CODE>GZIP</CODE></A>, 
<A HREF="../../../../../org/geotools/data/postgis/attributeio/Base64.html#DONT_BREAK_LINES"><CODE>DONT_BREAK_LINES</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="encodeBytes(byte[])"><!-- --></A><H3>
encodeBytes</H3>
<PRE>
public static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>encodeBytes</B>(byte[]&nbsp;source)</PRE>
<DL>
<DD>Encodes a byte array into Base64 notation.
 Does not GZip-compress data.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The data to convert<DT><B>Since:</B></DT>
  <DD>1.4</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="encodeBytes(byte[], int)"><!-- --></A><H3>