在Java中压缩文件时如何保留文件夹结构？

Question

在Java中压缩文件时如何保留文件夹结构？

javaandroidzip

4

我想压缩一个文件夹，其结构如下：

temp/folder1/file1

temp/folder2/file2

temp/file3

并且要保持完全相同的目录结构。目前，当我压缩它时，我得到的压缩文件不保持目录结构。它看起来像这样：

file1

file2

file3

我该怎么做才能像所有常规的压缩应用程序一样将文件添加到它们各自的文件夹中？

这是我目前拥有的代码：

package com.damastah.deflash;

import android.util.Log;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Compress {
    private static final int BUFFER = 2048;

    private ArrayList<File> _files;
    private String _zipFile;

    public Compress(ArrayList<File> files, String zipFile) {
        _files = files;
        _zipFile = zipFile;
    }

    public void zip() {
        try {
            BufferedInputStream origin = null;
            FileOutputStream dest = new FileOutputStream(_zipFile);

            ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
                    dest));

            byte data[] = new byte[BUFFER];
            Log.e("Compress - zip", "test");
            for (int i = 0; i < _files.size(); i++) {
                Log.v("Compress", "Adding: " + _files.get(i).getAbsolutePath());
                FileInputStream fi = new FileInputStream(_files.get(i)
                        .getAbsolutePath());
                origin = new BufferedInputStream(fi, BUFFER);
                ZipEntry entry;
                if (_files.get(i).getAbsolutePath().contains("."))
                    entry = new ZipEntry(_files
                            .get(i)
                            .getAbsolutePath()
                            .substring(
                                    _files.get(i).getAbsolutePath()
                                            .lastIndexOf("/") + 1));
                else
                    entry = new ZipEntry(_files.get(i).getAbsolutePath());
                out.putNextEntry(entry);

                int count;
                while ((count = origin.read(data, 0, BUFFER)) != -1) {
                    out.write(data, 0, count);
                }

                origin.close();
            }

            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

- Damastah

1个回答

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- Pshemo · Accepted Answer

我不是安卓开发者，所以请把这段代码仅作为提示。

class ZipCompress {
    public static void main(String[] args) throws IOException {

        String dir = "d:\\My folder\\";
        // this entries I want to put in archives in the way they are now
        String[] entries = { "temp\\folder1\\file1.txt", "temp\\folder2\\file2.txt",
                "temp\\file3.txt" };

        ZipOutputStream zipos = new ZipOutputStream(new BufferedOutputStream(
                new FileOutputStream(dir + "archive.zip")));

        // time to create entries and fill them with data
        for (String entrie : entries) {
            System.out.println("Writing file: " + dir + entrie);

            // prepering file stream
            BufferedInputStream fileStream = new BufferedInputStream(
                    new FileInputStream(dir + entrie));

//--------------------------------------------------------------------------
//          Here we decide how we entry will look like in archive.
//          We use only part of path from String[] entries
//          like "temp\\folder1\\file1.txt"
//--------------------------------------------------------------------------
            ZipEntry newEntry = new ZipEntry(entrie);

            newEntry.setComment("comment to entry: " + newEntry);

            // now lets put this entry in archive
            zipos.putNextEntry(newEntry);

            // lets put data from file to current archive entry
            int c;
            while ((c = fileStream.read()) != -1)
                zipos.write(c);
            fileStream.close();
        }
        zipos.close();
    }
}

编辑

我不确定你想在这里做什么

if (_files.get(i).getAbsolutePath().contains("."))
                    entry = new ZipEntry(_files
                            .get(i)
                            .getAbsolutePath()
                            .substring(
                                    _files.get(i).getAbsolutePath()
                                            .lastIndexOf("/") + 1));

从我看到的，它会删除文件路径，只留下文件名（类似于_files.get(i).getName()）。如果是这样，那就是为什么你的zip文件中没有文件夹结构的原因。你说zip条目应该只是那个文件名，没有任何文件夹。

所以，如果你想让zip文件包含/my/full/path/to/folder/temp/folder1/file1路径的一部分，比如temp/folder1/file1，只需在创建ZipEntry时删除该路径的不必要部分即可。

String dir = "/my/full/path/to/folder/";
for (int i = 0; i < _files.size(); i++) {
...
    if (_files.get(i).getAbsolutePath().contains(".")) {
        entry = new ZipEntry(_files
            .get(i).getAbsolutePath().replace(dir, ""));
...