下载文件夹-蒲公英云

下载文件夹

小鱼儿 2022-08-08 00:56 269阅读 0赞

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;
    }
}