multipartstream.html

最好的java上传组件

<A NAME="getHeaderEncoding()"><!-- --></A><H3>
getHeaderEncoding</H3>
<PRE>
public java.lang.String <B>getHeaderEncoding</B>()</PRE>
<DL>
<DD>Retrieves the character encoding used when reading the headers of an
 individual part. When not specified, or <code>null</code>, the platform
 default encoding is used.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The encoding used to read part headers.</DL>
</DD>
</DL>
<HR>

<A NAME="setHeaderEncoding(java.lang.String)"><!-- --></A><H3>
setHeaderEncoding</H3>
<PRE>
public void <B>setHeaderEncoding</B>(java.lang.String&nbsp;encoding)</PRE>
<DL>
<DD>Specifies the character encoding to be used when reading the headers of
 individual parts. When not specified, or <code>null</code>, the platform
 default encoding is used.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - The encoding used to read part headers.</DL>
</DD>
</DL>
<HR>

<A NAME="readByte()"><!-- --></A><H3>
readByte</H3>
<PRE>
public byte <B>readByte</B>()
              throws java.io.IOException</PRE>
<DL>
<DD>Reads a byte from the <code>buffer</code>, and refills it as
 necessary.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The next byte from the input stream.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is no more data available.</DL>
</DD>
</DL>
<HR>

<A NAME="readBoundary()"><!-- --></A><H3>
readBoundary</H3>
<PRE>
public boolean <B>readBoundary</B>()
                     throws <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></PRE>
<DL>
<DD>Skips a <code>boundary</code> token, and checks whether more
 <code>encapsulations</code> are contained in the stream.
<P>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if there are more encapsulations in
         this stream; <code>false</code> otherwise.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></CODE> - if the stream ends unexpecetedly or
                                  fails to follow required syntax.</DL>
</DD>
</DL>
<HR>

<A NAME="setBoundary(byte[])"><!-- --></A><H3>
setBoundary</H3>
<PRE>
public void <B>setBoundary</B>(byte[]&nbsp;boundary)
                 throws <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.IllegalBoundaryException.html" title="class in org.apache.commons.fileupload">MultipartStream.IllegalBoundaryException</A></PRE>
<DL>
<DD><p>Changes the boundary token used for partitioning the stream.

 <p>This method allows single pass processing of nested multipart
 streams.

 <p>The boundary token of the nested stream is <code>required</code>
 to be of the same length as the boundary token in parent stream.

 <p>Restoring the parent stream boundary token after processing of a
 nested stream is left to the application.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>boundary</CODE> - The boundary to be used for parsing of the nested
                 stream.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/apache/commons/fileupload/MultipartStream.IllegalBoundaryException.html" title="class in org.apache.commons.fileupload">MultipartStream.IllegalBoundaryException</A></CODE> - if the <code>boundary</code>
                                  has a different length than the one
                                  being currently parsed.</DL>
</DD>
</DL>
<HR>

<A NAME="readHeaders()"><!-- --></A><H3>
readHeaders</H3>
<PRE>
public java.lang.String <B>readHeaders</B>()
                             throws <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></PRE>
<DL>
<DD><p>Reads the <code>header-part</code> of the current
 <code>encapsulation</code>.

 <p>Headers are returned verbatim to the input stream, including the
 trailing <code>CRLF</code> marker. Parsing is left to the
 application.

 <p><strong>TODO</strong> allow limiting maximum header size to
 protect against abuse.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The <code>header-part</code> of the current encapsulation.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></CODE> - if the stream ends unexpecetedly.</DL>
</DD>
</DL>
<HR>

<A NAME="readBodyData(java.io.OutputStream)"><!-- --></A><H3>
readBodyData</H3>
<PRE>
public int <B>readBodyData</B>(java.io.OutputStream&nbsp;output)
                 throws <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A>,
                        java.io.IOException</PRE>
<DL>
<DD><p>Reads <code>body-data</code> from the current
 <code>encapsulation</code> and writes its contents into the
 output <code>Stream</code>.

 <p>Arbitrary large amounts of data can be processed by this
 method using a constant size buffer. (see <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.html#MultipartStream(java.io.InputStream, byte[], int)"><CODE>constructor</CODE></A>).
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>output</CODE> - The <code>Stream</code> to write data into.
<DT><B>Returns:</B><DD>the amount of data written.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></CODE> - if the stream ends unexpectedly.
<DD><CODE>java.io.IOException</CODE> - if an i/o error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="discardBodyData()"><!-- --></A><H3>
discardBodyData</H3>
<PRE>
public int <B>discardBodyData</B>()
                    throws <A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A>,
                           java.io.IOException</PRE>
<DL>
<DD><p> Reads <code>body-data</code> from the current
 <code>encapsulation</code> and discards it.

 <p>Use this method to skip encapsulations you don't need or don't
 understand.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The amount of data discarded.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/apache/commons/fileupload/MultipartStream.MalformedStreamException.html" title="class in org.apache.commons.fileupload">MultipartStream.MalformedStreamException</A></CODE> - if the stream ends unexpectedly.
<DD><CODE>java.io.IOException</CODE> - if an i/o error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="skipPreamble()"><!-- --></A><H3>
skipPreamble</H3>
<PRE>
public boolean <B>skipPreamble</B>()
                     throws java.io.IOException</PRE>
<DL>
<DD>Finds the beginning of the first <code>encapsulation</code>.
<P>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if an <code>encapsulation</code> was found in
         the stream.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if an i/o error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="arrayequals(byte[], byte[], int)"><!-- --></A><H3>
arrayequals</H3>
<PRE>
public static boolean <B>arrayequals</B>(byte[]&nbsp;a,
                                  byte[]&nbsp;b,
                                  int&nbsp;count)</PRE>
<DL>
<DD>Compares <code>count</code> first bytes in the arrays
 <code>a</code> and <code>b</code>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>a</CODE> - The first array to compare.<DD><CODE>b</CODE> - The second array to compare.<DD><CODE>count</CODE> - How many bytes should be compared.
<DT><B>Returns:</B><DD><code>true</code> if <code>count</code> first bytes in arrays
         <code>a</code> and <code>b</code> are equal.</DL>
</DD>
</DL>
<HR>

<A NAME="findByte(byte, int)"><!-- --></A><H3>
findByte</H3>
<PRE>
protected int <B>findByte</B>(byte&nbsp;value,
                       int&nbsp;pos)</PRE>
<DL>
<DD>Searches for a byte of specified value in the <code>buffer</code>,
 starting at the specified <code>position</code>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - The value to find.<DD><CODE>pos</CODE> - The starting position for searching.
<DT><B>Returns:</B><DD>The position of byte found, counting from beginning of the
         <code>buffer</code>, or <code>-1</code> if not found.</DL>
</DD>
</DL>
<HR>

<A NAME="findSeparator()"><!-- --></A><H3>
findSeparator</H3>
<PRE>
protected int <B>findSeparator</B>()</PRE>
<DL>
<DD>Searches for the <code>boundary</code> in the <code>buffer</code>
 region delimited by <code>head</code> and <code>tail</code>.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The position of the boundary found, counting from the
         beginning of the <code>buffer</code>, or <code>-1</code> if
         not found.</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Returns a string representation of this object.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The string representation of this object.</DL>
</DD>
</DL>
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