下载文件夹

下载文件夹，我们可以先将文件夹打包，然后进行下载，可以保留包，不删除，用时间戳方式判断是否删除后重建。

文件下载代码：

response.setHeader("Content-Type", "application/zip");
		response.setHeader("Content-Disposition", "attachment;filename=" + zipFile.getName());
		try {
			OutputStream to = response.getOutputStream();
			Files.copy(zipFile, to);
			to.flush();
			response.flushBuffer();
		} catch (IOException e) {
			e.getStackTrace();
		}

打包：

/*
 * Copyright 2010. 
 * 
 * This document may not be reproduced, distributed or used 
 * in any manner whatsoever without the expressed written 
 * permission of Boventech Corp. 
 * 
 * $Rev: Rev $
 * $Author: Author $
 * $LastChangedDate: LastChangedDate $
 *
 */

package com.boventech.zyk.util;

import java.io.File;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Expand;
import org.apache.tools.ant.taskdefs.Zip;
import org.apache.tools.ant.types.FileSet;

/**
 * 提供对文件进行压缩的操作
 */
public class Ziper {

	public static File doZip(File srcDir) {
		if (!srcDir.exists()) {
			throw new RuntimeException(srcDir + " isn't exist!");
		}
		File zipFile = new File(srcDir.getPath() + ".zip");

		/*
		 * 使用Ant的zip工具类，这里进行实例化
		 */
		Project project = new Project();
		Zip zip = new Zip();
		zip.setProject(project);
		zip.setDestFile(zipFile);

		/*
		 * 获取目标文件夹的文件集合
		 */
		FileSet fileSet = new FileSet();
		fileSet.setProject(project);
		fileSet.setDir(srcDir);

		/*
		 * 执行压缩操作
		 */
		zip.addFileset(fileSet);
		zip.execute();
		return zipFile;
	}

	public static String unZip(File srcFile, String destDir) {
		if (!srcFile.exists()) {
			throw new RuntimeException(srcFile + " isn't exist!");
		}
		Expand expand = new Expand();
		expand.setProject(new Project());
		expand.setSrc(srcFile);
		if (destDir == null) {
		    destDir = srcFile.getPath().substring(0, srcFile.getPath().lastIndexOf("."));
		}
		expand.setDest(new File(destDir));
		expand.execute();
		return destDir;
	}
}