fileuploadbase.html

java 的上传功能很强大的实施上述事实上说是

<a name="363" href="#363">363</a>                             <strong class="jxr_keyword">true</strong>);
<a name="364" href="#364">364</a>                 } <strong class="jxr_keyword">catch</strong> (FileUploadIOException e) {
<a name="365" href="#365">365</a>                     <strong class="jxr_keyword">throw</strong> (FileUploadException) e.getCause();
<a name="366" href="#366">366</a>                 } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a name="367" href="#367">367</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/commons/fileupload/FileUploadBase.html">IOFileUploadException</a>(
<a name="368" href="#368">368</a>                             <span class="jxr_string">"Processing of "</span> + MULTIPART_FORM_DATA
<a name="369" href="#369">369</a>                             + <span class="jxr_string">" request failed. "</span> + e.getMessage(), e);
<a name="370" href="#370">370</a>                 }
<a name="371" href="#371">371</a>                 <strong class="jxr_keyword">if</strong> (fileItem instanceof FileItemHeadersSupport) {
<a name="372" href="#372">372</a>                     <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/commons/fileupload/FileItemHeaders.html">FileItemHeaders</a> fih = item.getHeaders();
<a name="373" href="#373">373</a>                     ((<a href="../../../../org/apache/commons/fileupload/FileItemHeadersSupport.html">FileItemHeadersSupport</a>) fileItem).setHeaders(fih);
<a name="374" href="#374">374</a>                 }
<a name="375" href="#375">375</a>                 items.add(fileItem);
<a name="376" href="#376">376</a>             }
<a name="377" href="#377">377</a>             <strong class="jxr_keyword">return</strong> items;
<a name="378" href="#378">378</a>         } <strong class="jxr_keyword">catch</strong> (FileUploadIOException e) {
<a name="379" href="#379">379</a>             <strong class="jxr_keyword">throw</strong> (FileUploadException) e.getCause();
<a name="380" href="#380">380</a>         } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a name="381" href="#381">381</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/commons/fileupload/FileUploadException.html">FileUploadException</a>(e.getMessage(), e);
<a name="382" href="#382">382</a>         }
<a name="383" href="#383">383</a>     }
<a name="384" href="#384">384</a> 
<a name="385" href="#385">385</a> 
<a name="386" href="#386">386</a>     <em class="jxr_comment">// ------------------------------------------------------ Protected methods</em>
<a name="387" href="#387">387</a> 
<a name="388" href="#388">388</a> 
<a name="389" href="#389">389</a>     <em class="jxr_javadoccomment">/**</em>
<a name="390" href="#390">390</a> <em class="jxr_javadoccomment">     * Retrieves the boundary from the &lt;code&gt;Content-type&lt;/code&gt; header.</em>
<a name="391" href="#391">391</a> <em class="jxr_javadoccomment">     *</em>
<a name="392" href="#392">392</a> <em class="jxr_javadoccomment">     * @param contentType The value of the content type header from which to</em>
<a name="393" href="#393">393</a> <em class="jxr_javadoccomment">     *                    extract the boundary value.</em>
<a name="394" href="#394">394</a> <em class="jxr_javadoccomment">     *</em>
<a name="395" href="#395">395</a> <em class="jxr_javadoccomment">     * @return The boundary, as a byte array.</em>
<a name="396" href="#396">396</a> <em class="jxr_javadoccomment">     */</em>
<a name="397" href="#397">397</a>     <strong class="jxr_keyword">protected</strong> byte[] getBoundary(String contentType) {
<a name="398" href="#398">398</a>         <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> parser = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>();
<a name="399" href="#399">399</a>         parser.setLowerCaseNames(<strong class="jxr_keyword">true</strong>);
<a name="400" href="#400">400</a>         <em class="jxr_comment">// Parameter parser can handle null input</em>
<a name="401" href="#401">401</a>         Map params = parser.parse(contentType, <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">char</strong>[] {';', ','});
<a name="402" href="#402">402</a>         String boundaryStr = (String) params.get(<span class="jxr_string">"boundary"</span>);
<a name="403" href="#403">403</a> 
<a name="404" href="#404">404</a>         <strong class="jxr_keyword">if</strong> (boundaryStr == <strong class="jxr_keyword">null</strong>) {
<a name="405" href="#405">405</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a name="406" href="#406">406</a>         }
<a name="407" href="#407">407</a>         byte[] boundary;
<a name="408" href="#408">408</a>         <strong class="jxr_keyword">try</strong> {
<a name="409" href="#409">409</a>             boundary = boundaryStr.getBytes(<span class="jxr_string">"ISO-8859-1"</span>);
<a name="410" href="#410">410</a>         } <strong class="jxr_keyword">catch</strong> (UnsupportedEncodingException e) {
<a name="411" href="#411">411</a>             boundary = boundaryStr.getBytes();
<a name="412" href="#412">412</a>         }
<a name="413" href="#413">413</a>         <strong class="jxr_keyword">return</strong> boundary;
<a name="414" href="#414">414</a>     }
<a name="415" href="#415">415</a> 
<a name="416" href="#416">416</a> 
<a name="417" href="#417">417</a>     <em class="jxr_javadoccomment">/**</em>
<a name="418" href="#418">418</a> <em class="jxr_javadoccomment">     * Retrieves the file name from the &lt;code&gt;Content-disposition&lt;/code&gt;</em>
<a name="419" href="#419">419</a> <em class="jxr_javadoccomment">     * header.</em>
<a name="420" href="#420">420</a> <em class="jxr_javadoccomment">     *</em>
<a name="421" href="#421">421</a> <em class="jxr_javadoccomment">     * @param headers A &lt;code&gt;Map&lt;/code&gt; containing the HTTP request headers.</em>
<a name="422" href="#422">422</a> <em class="jxr_javadoccomment">     *</em>
<a name="423" href="#423">423</a> <em class="jxr_javadoccomment">     * @return The file name for the current &lt;code&gt;encapsulation&lt;/code&gt;.</em>
<a name="424" href="#424">424</a> <em class="jxr_javadoccomment">     * @deprecated Use {@link #getFileName(FileItemHeaders)}.</em>
<a name="425" href="#425">425</a> <em class="jxr_javadoccomment">     */</em>
<a name="426" href="#426">426</a>     <strong class="jxr_keyword">protected</strong> String getFileName(Map <em class="jxr_comment">/*<em class="jxr_comment"> String, String */</em> headers) {</em>
<a name="427" href="#427">427</a>         <strong class="jxr_keyword">return</strong> getFileName(getHeader(headers, CONTENT_DISPOSITION));
<a name="428" href="#428">428</a>     }
<a name="429" href="#429">429</a> 
<a name="430" href="#430">430</a>     <em class="jxr_javadoccomment">/**</em>
<a name="431" href="#431">431</a> <em class="jxr_javadoccomment">     * Retrieves the file name from the &lt;code&gt;Content-disposition&lt;/code&gt;</em>
<a name="432" href="#432">432</a> <em class="jxr_javadoccomment">     * header.</em>
<a name="433" href="#433">433</a> <em class="jxr_javadoccomment">     *</em>
<a name="434" href="#434">434</a> <em class="jxr_javadoccomment">     * @param headers The HTTP headers object.</em>
<a name="435" href="#435">435</a> <em class="jxr_javadoccomment">     *</em>
<a name="436" href="#436">436</a> <em class="jxr_javadoccomment">     * @return The file name for the current &lt;code&gt;encapsulation&lt;/code&gt;.</em>
<a name="437" href="#437">437</a> <em class="jxr_javadoccomment">     */</em>
<a name="438" href="#438">438</a>     <strong class="jxr_keyword">protected</strong> String getFileName(<a href="../../../../org/apache/commons/fileupload/FileItemHeaders.html">FileItemHeaders</a> headers) {
<a name="439" href="#439">439</a>         <strong class="jxr_keyword">return</strong> getFileName(headers.getHeader(CONTENT_DISPOSITION));
<a name="440" href="#440">440</a>     }
<a name="441" href="#441">441</a> 
<a name="442" href="#442">442</a>     <em class="jxr_javadoccomment">/**</em>
<a name="443" href="#443">443</a> <em class="jxr_javadoccomment">     * Returns the given content-disposition headers file name.</em>
<a name="444" href="#444">444</a> <em class="jxr_javadoccomment">     * @param pContentDisposition The content-disposition headers value.</em>
<a name="445" href="#445">445</a> <em class="jxr_javadoccomment">     * @return The file name</em>
<a name="446" href="#446">446</a> <em class="jxr_javadoccomment">     */</em>
<a name="447" href="#447">447</a>     <strong class="jxr_keyword">private</strong> String getFileName(String pContentDisposition) {
<a name="448" href="#448">448</a>         String fileName = <strong class="jxr_keyword">null</strong>;
<a name="449" href="#449">449</a>         <strong class="jxr_keyword">if</strong> (pContentDisposition != <strong class="jxr_keyword">null</strong>) {
<a name="450" href="#450">450</a>             String cdl = pContentDisposition.toLowerCase();
<a name="451" href="#451">451</a>             <strong class="jxr_keyword">if</strong> (cdl.startsWith(FORM_DATA) || cdl.startsWith(ATTACHMENT)) {
<a name="452" href="#452">452</a>                 <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> parser = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>();
<a name="453" href="#453">453</a>                 parser.setLowerCaseNames(<strong class="jxr_keyword">true</strong>);
<a name="454" href="#454">454</a>                 <em class="jxr_comment">// Parameter parser can handle null input</em>
<a name="455" href="#455">455</a>                 Map params = parser.parse(pContentDisposition, ';');
<a name="456" href="#456">456</a>                 <strong class="jxr_keyword">if</strong> (params.containsKey(<span class="jxr_string">"filename"</span>)) {
<a name="457" href="#457">457</a>                     fileName = (String) params.get(<span class="jxr_string">"filename"</span>);
<a name="458" href="#458">458</a>                     <strong class="jxr_keyword">if</strong> (fileName != <strong class="jxr_keyword">null</strong>) {
<a name="459" href="#459">459</a>                         fileName = fileName.trim();
<a name="460" href="#460">460</a>                     } <strong class="jxr_keyword">else</strong> {
<a name="461" href="#461">461</a>                         <em class="jxr_comment">// Even if there is no value, the parameter is present,</em>
<a name="462" href="#462">462</a>                         <em class="jxr_comment">// so we return an empty file name rather than no file</em>
<a name="463" href="#463">463</a>                         <em class="jxr_comment">// name.</em>
<a name="464" href="#464">464</a>                         fileName = <span class="jxr_string">""</span>;
<a name="465" href="#465">465</a>                     }
<a name="466" href="#466">466</a>                 }
<a name="467" href="#467">467</a>             }
<a name="468" href="#468">468</a>         }
<a name="469" href="#469">469</a>         <strong class="jxr_keyword">return</strong> fileName;
<a name="470" href="#470">470</a>     }
<a name="471" href="#471">471</a> 
<a name="472" href="#472">472</a> 
<a name="473" href="#473">473</a>     <em class="jxr_javadoccomment">/**</em>
<a name="474" href="#474">474</a> <em class="jxr_javadoccomment">     * Retrieves the field name from the &lt;code&gt;Content-disposition&lt;/code&gt;</em>
<a name="475" href="#475">475</a> <em class="jxr_javadoccomment">     * header.</em>
<a name="476" href="#476">476</a> <em class="jxr_javadoccomment">     *</em>
<a name="477" href="#477">477</a> <em class="jxr_javadoccomment">     * @param headers A &lt;code&gt;Map&lt;/code&gt; containing the HTTP request headers.</em>
<a name="478" href="#478">478</a> <em class="jxr_javadoccomment">     *</em>
<a name="479" href="#479">479</a> <em class="jxr_javadoccomment">     * @return The field name for the current &lt;code&gt;encapsulation&lt;/code&gt;.</em>
<a name="480" href="#480">480</a> <em class="jxr_javadoccomment">     */</em>
<a name="481" href="#481">481</a>     <strong class="jxr_keyword">protected</strong> String getFieldName(<a href="../../../../org/apache/commons/fileupload/FileItemHeaders.html">FileItemHeaders</a> headers) {
<a name="482" href="#482">482</a>         <strong class="jxr_keyword">return</strong> getFieldName(headers.getHeader(CONTENT_DISPOSITION));
<a name="483" href="#483">483</a>     }
<a name="484" href="#484">484</a> 
<a name="485" href="#485">485</a>     <em class="jxr_javadoccomment">/**</em>
<a name="486" href="#486">486</a> <em class="jxr_javadoccomment">     * Returns the field name, which is given by the content-disposition</em>