How to use

DiskFileItem

in

org.apache.tomcat.util.http.fileupload.disk

@Override
public String getHeader(String name) {
  if (fileItem instanceof DiskFileItem) {
    return ((DiskFileItem) fileItem).getHeaders().getHeader(name);
  }
  return null;
}

/**
 * Returns a string representation of this object.
 *
 * @return a string representation of this object.
 */
@Override
public String toString() {
  return String.format("name=%s, StoreLocation=%s, size=%s bytes, isFormField=%s, FieldName=%s",
         getName(), getStoreLocation(), Long.valueOf(getSize()),
         Boolean.valueOf(isFormField()), getFieldName());
}

/**
 * Create a new {@link DiskFileItem}
 * instance from the supplied parameters and the local factory
 * configuration.
 *
 * @param fieldName   The name of the form field.
 * @param contentType The content type of the form field.
 * @param isFormField <code>true</code> if this is a plain form field;
 *                    <code>false</code> otherwise.
 * @param fileName    The name of the uploaded file, if any, as supplied
 *                    by the browser or other client.
 *
 * @return The newly created file item.
 */
@Override
public FileItem createItem(String fieldName, String contentType,
    boolean isFormField, String fileName) {
  DiskFileItem result = new DiskFileItem(fieldName, contentType,
      isFormField, fileName, sizeThreshold, repository);
  result.setDefaultCharset(defaultCharset);
  return result;
}

/**
 * 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.
 */
@Override
public void delete() {
  cachedContent = null;
  File outputFile = getStoreLocation();
  if (outputFile != null && !isInMemory() && outputFile.exists()) {
    outputFile.delete();
  }
}

if (isInMemory()) {
  FileOutputStream fout = null;
  try {
    fout = new FileOutputStream(file);
    fout.write(get());
  } finally {
    if (fout != null) {
  File outputFile = getStoreLocation();
  if (outputFile != null) {

/**
 * Returns the contents of the file as a String, using the default
 * character encoding.  This method uses {@link #get()} to retrieve the
 * contents of the file.
 *
 * @return The contents of the file, as a string.
 *
 * TODO Consider making this method throw UnsupportedEncodingException.
 */
@Override
public String getString() {
  byte[] rawdata = get();
  String charset = getCharSet();
  if (charset == null) {
    charset = DEFAULT_CHARSET;
  }
  try {
    return new String(rawdata, charset);
  } catch (UnsupportedEncodingException e) {
    return new String(rawdata);
  }
}

if (isInMemory()) {
  if (cachedContent == null) {
    cachedContent = dfos.getData();
byte[] fileData = new byte[(int) getSize()];
FileInputStream fis = null;

/**
 * Create a new {@link DiskFileItem}
 * instance from the supplied parameters and the local factory
 * configuration.
 *
 * @param fieldName   The name of the form field.
 * @param contentType The content type of the form field.
 * @param isFormField <code>true</code> if this is a plain form field;
 *                    <code>false</code> otherwise.
 * @param fileName    The name of the uploaded file, if any, as supplied
 *                    by the browser or other client.
 *
 * @return The newly created file item.
 */
public FileItem createItem(String fieldName, String contentType,
    boolean isFormField, String fileName) {
  DiskFileItem result = new DiskFileItem(fieldName, contentType,
      isFormField, fileName, sizeThreshold, repository);
  FileCleaningTracker tracker = getFileCleaningTracker();
  if (tracker != null) {
    tracker.track(result.getTempFile(), this);
  }
  return result;
}

/**
 * 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.
 */
public void delete() {
  cachedContent = null;
  File outputFile = getStoreLocation();
  if (outputFile != null && outputFile.exists()) {
    outputFile.delete();
  }
}

/**
 * Returns the contents of the file as a String, using the specified
 * encoding.  This method uses {@link #get()} to retrieve the
 * contents of the file.
 *
 * @param charset The charset to use.
 *
 * @return The contents of the file, as a string.
 *
 * @throws UnsupportedEncodingException if the requested character
 *                                      encoding is not available.
 */
@Override
public String getString(final String charset)
  throws UnsupportedEncodingException {
  return new String(get(), charset);
}

/**
 * Returns the content charset passed by the agent or <code>null</code> if
 * not defined.
 *
 * @return The content charset passed by the agent or <code>null</code> if
 *         not defined.
 */
public String getCharSet() {
  ParameterParser parser = new ParameterParser();
  parser.setLowerCaseNames(true);
  // Parameter parser can handle null input
  Map<String,String> params = parser.parse(getContentType(), ';');
  return params.get("charset");
}

/**
 * Returns an {@link java.io.OutputStream OutputStream} that can
 * be used for storing the contents of the file.
 *
 * @return An {@link java.io.OutputStream OutputStream} that can be used
 *         for storing the contensts of the file.
 *
 * @throws IOException if an error occurs.
 */
public OutputStream getOutputStream()
  throws IOException {
  if (dfos == null) {
    File outputFile = getTempFile();
    dfos = new DeferredFileOutputStream(sizeThreshold, outputFile);
  }
  return dfos;
}

  /**
   * Create a new {@link DiskFileItem}
   * instance from the supplied parameters and the local factory
   * configuration.
   *
   * @param fieldName   The name of the form field.
   * @param contentType The content type of the form field.
   * @param isFormField <code>true</code> if this is a plain form field;
   *                    <code>false</code> otherwise.
   * @param fileName    The name of the uploaded file, if any, as supplied
   *                    by the browser or other client.
   *
   * @return The newly created file item.
   */
  @Override
  public FileItem createItem(String fieldName, String contentType,
      boolean isFormField, String fileName) {
    return new DiskFileItem(fieldName, contentType,
        isFormField, fileName, sizeThreshold, repository);
  }
}

if (isInMemory()) {
  FileOutputStream fout = null;
  try {
    fout = new FileOutputStream(file);
    fout.write(get());
  } finally {
    if (fout != null) {
  File outputFile = getStoreLocation();
  if (outputFile != null) {

/**
 * Returns the contents of the file as a String, using the default
 * character encoding.  This method uses {@link #get()} to retrieve the
 * contents of the file.
 *
 * @return The contents of the file, as a string.
 *
 * TODO Consider making this method throw UnsupportedEncodingException.
 */
public String getString() {
  byte[] rawdata = get();
  String charset = getCharSet();
  if (charset == null) {
    charset = DEFAULT_CHARSET;
  }
  try {
    return new String(rawdata, charset);
  } catch (UnsupportedEncodingException e) {
    return new String(rawdata);
  }
}

if (isInMemory()) {
  if (cachedContent == null) {
    cachedContent = dfos.getData();
byte[] fileData = new byte[(int) getSize()];
InputStream fis = null;

/**
 * Create a new {@link DiskFileItem}
 * instance from the supplied parameters and the local factory
 * configuration.
 *
 * @param fieldName   The name of the form field.
 * @param contentType The content type of the form field.
 * @param isFormField <code>true</code> if this is a plain form field;
 *                    <code>false</code> otherwise.
 * @param fileName    The name of the uploaded file, if any, as supplied
 *                    by the browser or other client.
 *
 * @return The newly created file item.
 */
public FileItem createItem(String fieldName, String contentType,
    boolean isFormField, String fileName) {
  DiskFileItem result = new DiskFileItem(fieldName, contentType,
      isFormField, fileName, sizeThreshold, repository);
  FileCleaningTracker tracker = getFileCleaningTracker();
  if (tracker != null) {
    tracker.track(result.getTempFile(), this);
  }
  return result;
}

/**
 * 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.
 */
public void delete() {
  cachedContent = null;
  File outputFile = getStoreLocation();
  if (outputFile != null && outputFile.exists()) {
    outputFile.delete();
  }
}

/**
 * Returns the contents of the file as a String, using the specified
 * encoding.  This method uses {@link #get()} to retrieve the
 * contents of the file.
 *
 * @param charset The charset to use.
 *
 * @return The contents of the file, as a string.
 *
 * @throws UnsupportedEncodingException if the requested character
 *                                      encoding is not available.
 */
public String getString(final String charset)
  throws UnsupportedEncodingException {
  return new String(get(), charset);
}

/**
 * Returns the content charset passed by the agent or <code>null</code> if
 * not defined.
 *
 * @return The content charset passed by the agent or <code>null</code> if
 *         not defined.
 */
public String getCharSet() {
  ParameterParser parser = new ParameterParser();
  parser.setLowerCaseNames(true);
  // Parameter parser can handle null input
  Map<String,String> params = parser.parse(getContentType(), ';');
  return params.get("charset");
}