monitoreddiskfileitem.java

一个很成功的struts上传下载的demo........自己修改版,通用

/* Licence:
 *   Use this however/wherever you like, just don't blame me if it breaks anything.
 *
 * Credit:
 *   If you're nice, you'll leave this bit:
 *
 *   Class by Pierre-Alexandre Losson -- http://www.telio.be/blog
 *   email : [e-mail]
 */
package be.telio.mediastore.ui.upload;

import org.apache.commons.fileupload.disk.DiskFileItem;

import java.io.File;
import java.io.OutputStream;
import java.io.IOException;

/**
 * Created by IntelliJ IDEA.
 * 
 * @author Original : plosson on 05-janv.-2006 10:46:33 - Last modified by
 *         $Author: plosson $ on $Date: 2006/01/05 10:09:38 $
 * @version 1.0 - Rev. $Revision: 1.1 $
 */
public class MonitoredDiskFileItem extends DiskFileItem {
	private MonitoredOutputStream mos = null;
	private OutputStreamListener listener;

	public MonitoredDiskFileItem(String fieldName, String contentType,
			boolean isFormField, String fileName, int sizeThreshold,
			File repository, OutputStreamListener listener) {
		super(fieldName, contentType, isFormField, fileName, sizeThreshold,
				repository);
		this.listener = listener;
	}

	public OutputStream getOutputStream() throws IOException {
		if (mos == null) {
			mos = new MonitoredOutputStream(super.getOutputStream(), listener);
		}
		return mos;
	}
}