import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
private String copyFile(String inputFileName) throws Exception {
	// copy server local file to web service folder
	// this function is to solve "permission deny" problem
	// on UNIX-based OS
	File f = new File(inputFileName);

	String outputFile = getServletContext().getRealPath("/") + "/data/"
			+ f.getName();
	File outf = new File(outputFile);
	BufferedInputStream inStream = new BufferedInputStream(
			new FileInputStream(f));

	BufferedOutputStream outStream = new BufferedOutputStream(
			new FileOutputStream(outf));
	Streams.copy(inStream, outStream, true);
	return outf.getName();
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * <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
 * {@link #MultipartStream(InputStream,byte[],int, MultipartStream.ProgressNotifier)
 * constructor}).
 *
 * @param output
 *            The <code>Stream</code> to write data into. May be null, in
 *            which case this method is equivalent to
 *            {@link #discardBodyData()}.
 *
 * @return the amount of data written.
 *
 * @throws MalformedStreamException
 *             if the stream ends unexpectedly.
 * @throws IOException
 *             if an i/o error occurs.
 */
public int readBodyData(OutputStream output) throws MalformedStreamException, IOException {
	return (int) Streams.copy(newInputStream(), output, false); // N.B.
																// Streams.copy
																// closes
																// the input
																// stream
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * <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 {@link
 * #MultipartStream(InputStream,byte[],int,
 *   MultipartStream.ProgressNotifier) constructor}).
 *
 * @param output The <code>Stream</code> to write data into. May
 *               be null, in which case this method is equivalent
 *               to {@link #discardBodyData()}.
 *
 * @return the amount of data written.
 *
 * @throws MalformedStreamException if the stream ends unexpectedly.
 * @throws IOException              if an i/o error occurs.
 */
public int readBodyData(OutputStream output)
        throws MalformedStreamException, IOException {
    return (int) Streams.copy(newInputStream(), output, false); // N.B. Streams.copy closes the input stream
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the original filename in the client's filesystem.
 *
 * @return The original filename in the client's filesystem.
 * @throws org.apache.tomcat.util.http.fileupload.InvalidFileNameException
 *   The file name contains a NUL character, which might be an indicator of
 *   a security attack. If you intend to use the file name anyways, catch
 *   the exception and use {@link
 *   org.apache.tomcat.util.http.fileupload.InvalidFileNameException#getName()}.
 */
@Override
public String getName() {
    return Streams.checkFileName(fileName);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the items file name.
 *
 * @return File name, if known, or null.
 * @throws InvalidFileNameException The file name contains a NUL character,
 *   which might be an indicator of a security attack. If you intend to
 *   use the file name anyways, catch the exception and use
 *   InvalidFileNameException#getName().
 */
@Override
public String getName() {
    return Streams.checkFileName(name);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the original filename in the client's filesystem.
 *
 * @return The original filename in the client's filesystem.
 * @throws org.apache.tomcat.util.http.fileupload.InvalidFileNameException
 *             The file name contains a NUL character, which might be an
 *             indicator of a security attack. If you intend to use the file
 *             name anyways, catch the exception and use
 *             {@link org.apache.tomcat.util.http.fileupload.InvalidFileNameException#getName()}
 *             .
 */
@Override
public String getName() {
	return Streams.checkFileName(fileName);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the items file name.
 *
 * @return File name, if known, or null.
 * @throws InvalidFileNameException
 *             The file name contains a NUL character, which might
 *             be an indicator of a security attack. If you intend
 *             to use the file name anyways, catch the exception and
 *             use InvalidFileNameException#getName().
 */
@Override
public String getName() {
	return Streams.checkFileName(name);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * <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 {@link
 * #MultipartStream(InputStream,byte[],int,
 *   MultipartStream.ProgressNotifier) constructor}).
 *
 * @param output The <code>Stream</code> to write data into. May
 *               be null, in which case this method is equivalent
 *               to {@link #discardBodyData()}.
 *
 * @return the amount of data written.
 *
 * @throws MalformedStreamException if the stream ends unexpectedly.
 * @throws IOException              if an i/o error occurs.
 */
public int readBodyData(OutputStream output)
        throws MalformedStreamException, IOException {
    final InputStream istream = newInputStream();
    return (int) Streams.copy(istream, output, false);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the original filename in the client's filesystem.
 *
 * @return The original filename in the client's filesystem.
 * @throws org.apache.tomcat.util.http.fileupload.InvalidFileNameException
 *   The file name contains a NUL character, which might be an indicator of
 *   a security attack. If you intend to use the file name anyways, catch
 *   the exception and use InvalidFileNameException#getName().
 */
@Override
public String getName() {
    return Streams.checkFileName(fileName);
}
 

import org.apache.tomcat.util.http.fileupload.util.Streams; //导入依赖的package包/类
/**
 * Returns the items file name.
 * @return File name, if known, or null.
 * @throws InvalidFileNameException The file name contains a NUL character,
 *   which might be an indicator of a security attack. If you intend to
 *   use the file name anyways, catch the exception and use
 *   InvalidFileNameException#getName().
 */
@Override
public String getName() {
    return Streams.checkFileName(name);
}