fileitem.html

最好的java上传组件

</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The content type passed by the browser or <code>null</code> if
         not defined.</DL>
</DD>
</DL>
<HR>

<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
public java.lang.String <B>getName</B>()</PRE>
<DL>
<DD>Returns the original filename in the client's filesystem, as provided by
 the browser (or other client software). In most cases, this will be the
 base file name, without path information. However, some clients, such as
 the Opera browser, do include path information.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The original filename in the client's filesystem.</DL>
</DD>
</DL>
<HR>

<A NAME="isInMemory()"><!-- --></A><H3>
isInMemory</H3>
<PRE>
public boolean <B>isInMemory</B>()</PRE>
<DL>
<DD>Provides a hint as to whether or not the file contents will be read
 from memory.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if the file contents will be read from memory;
         <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="getSize()"><!-- --></A><H3>
getSize</H3>
<PRE>
public long <B>getSize</B>()</PRE>
<DL>
<DD>Returns the size of the file item.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The size of the file item, in bytes.</DL>
</DD>
</DL>
<HR>

<A NAME="get()"><!-- --></A><H3>
get</H3>
<PRE>
public byte[] <B>get</B>()</PRE>
<DL>
<DD>Returns the contents of the file item as an array of bytes.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The contents of the file item as an array of bytes.</DL>
</DD>
</DL>
<HR>

<A NAME="getString(java.lang.String)"><!-- --></A><H3>
getString</H3>
<PRE>
public java.lang.String <B>getString</B>(java.lang.String&nbsp;encoding)
                           throws java.io.UnsupportedEncodingException</PRE>
<DL>
<DD>Returns the contents of the file item as a String, using the specified
 encoding.  This method uses <A HREF="../../../../org/apache/commons/fileupload/FileItem.html#get()"><CODE>get()</CODE></A> to retrieve the
 contents of the item.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>encoding</CODE> - The character encoding to use.
<DT><B>Returns:</B><DD>The contents of the item, as a string.
<DT><B>Throws:</B>
<DD><CODE>java.io.UnsupportedEncodingException</CODE> - if the requested character
                                      encoding is not available.</DL>
</DD>
</DL>
<HR>

<A NAME="getString()"><!-- --></A><H3>
getString</H3>
<PRE>
public java.lang.String <B>getString</B>()</PRE>
<DL>
<DD>Returns the contents of the file item as a String, using the default
 character encoding.  This method uses <A HREF="../../../../org/apache/commons/fileupload/FileItem.html#get()"><CODE>get()</CODE></A> to retrieve the
 contents of the item.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The contents of the item, as a string.</DL>
</DD>
</DL>
<HR>

<A NAME="write(java.io.File)"><!-- --></A><H3>
write</H3>
<PRE>
public void <B>write</B>(java.io.File&nbsp;file)
           throws java.lang.Exception</PRE>
<DL>
<DD>A convenience method to write an uploaded item to disk. The client code
 is not concerned with whether or not the item is stored in memory, or on
 disk in a temporary location. They just want to write the uploaded item
 to a file.
 <p>
 This method is not guaranteed to succeed if called more than once for
 the same item. This allows a particular implementation to use, for
 example, file renaming, where possible, rather than copying all of the
 underlying data, thus gaining a significant performance benefit.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - The <code>File</code> into which the uploaded item should
             be stored.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs.</DL>
</DD>
</DL>
<HR>

<A NAME="delete()"><!-- --></A><H3>
delete</H3>
<PRE>
public void <B>delete</B>()</PRE>
<DL>
<DD>Deletes the underlying storage for a file item, including deleting any
 associated temporary disk file. Although this storage will be deleted
 automatically when the <code>FileItem</code> instance is garbage
 collected, this method can be used to ensure that this is done at an
 earlier time, thus preserving system resources.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getFieldName()"><!-- --></A><H3>
getFieldName</H3>
<PRE>
public java.lang.String <B>getFieldName</B>()</PRE>
<DL>
<DD>Returns the name of the field in the multipart form corresponding to
 this file item.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The name of the form field.</DL>
</DD>
</DL>
<HR>

<A NAME="setFieldName(java.lang.String)"><!-- --></A><H3>
setFieldName</H3>
<PRE>
public void <B>setFieldName</B>(java.lang.String&nbsp;name)</PRE>
<DL>
<DD>Sets the field name used to reference this file item.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - The name of the form field.</DL>
</DD>
</DL>
<HR>

<A NAME="isFormField()"><!-- --></A><H3>
isFormField</H3>
<PRE>
public boolean <B>isFormField</B>()</PRE>
<DL>
<DD>Determines whether or not a <code>FileItem</code> instance represents
 a simple form field.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if the instance represents a simple form
         field; <code>false</code> if it represents an uploaded file.</DL>
</DD>
</DL>
<HR>

<A NAME="setFormField(boolean)"><!-- --></A><H3>
setFormField</H3>
<PRE>
public void <B>setFormField</B>(boolean&nbsp;state)</PRE>
<DL>
<DD>Specifies whether or not a <code>FileItem</code> instance represents
 a simple form field.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>state</CODE> - <code>true</code> if the instance represents a simple form
              field; <code>false</code> if it represents an uploaded file.</DL>
</DD>
</DL>
<HR>

<A NAME="getOutputStream()"><!-- --></A><H3>
getOutputStream</H3>
<PRE>
public java.io.OutputStream <B>getOutputStream</B>()
                                     throws java.io.IOException</PRE>
<DL>
<DD>Returns an <CODE>OutputStream</CODE> that can
 be used for storing the contents of the file.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>An <CODE>OutputStream</CODE> that can be used
         for storing the contensts of the file.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if an error occurs.</DL>
</DD>
</DL>
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