在android中从zip解压缩文件夹(Extract folders from zip in android)

在android中从zip解压缩文件夹(Extract folders from zip in android)

我的应用程序必须下载一个zip，并且必须在应用程序文件夹中解压缩它。 问题是zip没有文件而是文件夹，每个文件夹中都有不同的文件。 我会保持相同的结构，但我不知道它是怎么做的。 如果我用一个文件的拉链但没有文件夹的拉链，我成功了。 有人知道它是怎么做到的吗？ 非常感谢。

My application has to download a zip and has to unzip it in the application folder. The problem is that the zip doesn't have files but folders and in each folder there are different files. I would to keep the same structure but I don't know how do it. I succeed if i do it with a zip of files but not with a zip of folders. There is somebody who knows how do it? Many thanks.

最满意答案

您需要为ZIP存档中的每个目录条目创建目录。 这是我编写和使用的方法，它将保留目录结构：

/** * Unzip a ZIP file, keeping the directory structure. * * @param zipFile * A valid ZIP file. * @param destinationDir * The destination directory. It will be created if it doesn't exist. * @return {@code true} if the ZIP file was successfully decompressed. */ public static boolean unzip(File zipFile, File destinationDir) { ZipFile zip = null; try { destinationDir.mkdirs(); zip = new ZipFile(zipFile); Enumeration<? extends ZipEntry> zipFileEntries = zip.entries(); while (zipFileEntries.hasMoreElements()) { ZipEntry entry = zipFileEntries.nextElement(); String entryName = entry.getName(); File destFile = new File(destinationDir, entryName); File destinationParent = destFile.getParentFile(); if (destinationParent != null && !destinationParent.exists()) { destinationParent.mkdirs(); } if (!entry.isDirectory()) { BufferedInputStream is = new BufferedInputStream(zip.getInputStream(entry)); int currentByte; byte data[] = new byte[DEFUALT_BUFFER]; FileOutputStream fos = new FileOutputStream(destFile); BufferedOutputStream dest = new BufferedOutputStream(fos, DEFUALT_BUFFER); while ((currentByte = is.read(data, 0, DEFUALT_BUFFER)) != EOF) { dest.write(data, 0, currentByte); } dest.flush(); dest.close(); is.close(); } } } catch (Exception e) { return false; } finally { if (zip != null) { try { zip.close(); } catch (IOException ignored) { } } } return true; }

You will need to create the directories for each directory entry in the ZIP archive. Here is a method I wrote and use that will keep the directory structure:

/** * Unzip a ZIP file, keeping the directory structure. * * @param zipFile * A valid ZIP file. * @param destinationDir * The destination directory. It will be created if it doesn't exist. * @return {@code true} if the ZIP file was successfully decompressed. */ public static boolean unzip(File zipFile, File destinationDir) { ZipFile zip = null; try { destinationDir.mkdirs(); zip = new ZipFile(zipFile); Enumeration<? extends ZipEntry> zipFileEntries = zip.entries(); while (zipFileEntries.hasMoreElements()) { ZipEntry entry = zipFileEntries.nextElement(); String entryName = entry.getName(); File destFile = new File(destinationDir, entryName); File destinationParent = destFile.getParentFile(); if (destinationParent != null && !destinationParent.exists()) { destinationParent.mkdirs(); } if (!entry.isDirectory()) { BufferedInputStream is = new BufferedInputStream(zip.getInputStream(entry)); int currentByte; byte data[] = new byte[DEFUALT_BUFFER]; FileOutputStream fos = new FileOutputStream(destFile); BufferedOutputStream dest = new BufferedOutputStream(fos, DEFUALT_BUFFER); while ((currentByte = is.read(data, 0, DEFUALT_BUFFER)) != EOF) { dest.write(data, 0, currentByte); } dest.flush(); dest.close(); is.close(); } } } catch (Exception e) { return false; } finally { if (zip != null) { try { zip.close(); } catch (IOException ignored) { } } } return true; }