解压缩ePub文件不起作用

I am developping an app to decompress an .epub file into SDCARD in Android. I already read the Can't Unzip EPub File TOPIC. IT WORKED FOR .zip files but not for .epub files. Can somone tell me where is the problem ? here is the exception log:

我正在开发一个应用程序,将.epub文件解压缩到Android中的SDCARD。我已经读过无法解压缩的EPub文件TOPIC。它适用于.zip文件但不适用于.epub文件。可以告诉我问题出在哪里?这是异常日志:

03-21 13:35:44.281: W/System.err(1255): java.io.FileNotFoundException: /mnt/sdcard/unzipped11/META-INF/container.xml: open failed: ENOENT (No such file or directory)

I am using this code:

我正在使用此代码:

private void decom() throws IOException {
    ZipFile zipFile = new ZipFile(Environment.getExternalStorageDirectory()+"/dir.zip");
    String path = Environment.getExternalStorageDirectory() + "/unzipped10/";

    Enumeration<?> files = zipFile.entries();
    _dirChecker("");
    while (files.hasMoreElements()) {
        ZipEntry entry = (ZipEntry) files.nextElement();
        Log.v("ZipEntry", ""+entry);
        Log.v("isDirectory", ""+entry.isDirectory());

        if (entry.isDirectory()) {
            File file = new File(path + entry.getName());
            file.mkdir();
            System.out.println("Create dir " + entry.getName());
        } else {
            File f = new File(path + entry.getName());
            FileOutputStream fos = new FileOutputStream(f);
            InputStream is = zipFile.getInputStream(entry);
            byte[] buffer = new byte[1024];
            int bytesRead = 0;
            while ((bytesRead = is.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
            fos.close();
            System.out.println("Create File " + entry.getName());
        }
    }
}

1 个解决方案

#1

Based on your response to my comment, it sounds like the parent directory to the file is not created before the entry for the file in the archive is attempted to be written.

根据您对我的评论的回复,听起来在尝试写入归档文件的条目之前,不会创建该文件的父目录。

It sounds like you may need to alter the code that deals with a file entry in the zip file to create parent directories if they do not yet exist. You may also need to alter the code which creates the directories to check if the directory already exists before creating it.

听起来您可能需要更改处理zip文件中的文件条目的代码,以创建父目录(如果它们尚不存在)。您可能还需要更改创建目录的代码,以在创建目录之前检查目录是否已存在。

Try something like this:

尝试这样的事情:

    while (files.hasMoreElements()) {
        ZipEntry entry = (ZipEntry) files.nextElement();
        Log.d(TAG, "ZipEntry: "+entry);
        Log.d(TAG, "isDirectory: " + entry.isDirectory());

        if (entry.isDirectory()) {
            File file = new File(path + entry.getName());
            file.mkdir();
            Log.d(TAG, "Create dir " + entry.getName());
        } else {
            File f = new File(path + entry.getName());
            f.getParentFile().mkdirs();
            FileOutputStream fos = new FileOutputStream(f);
            InputStream is = zipFile.getInputStream(entry);
            byte[] buffer = new byte[1024];
            int bytesRead = 0;
            while ((bytesRead = is.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
            fos.close();
            Log.d(TAG, "Create File " + entry.getName());
        }
    }
    Log.d(TAG, "Done extracting epub file");

For me this produces the following output using a test epub (moby dick from Google's epub samples: https://code.google.com/p/epub-samples/downloads/list)

对我来说,这会使用测试epub产生以下输出(来自Google的epub样本的moby dick:https://code.google.com/p/epub-samples/downloads/list)

ZipEntry: mimetype
isDirectory: false
Create File mimetype
ZipEntry: META-INF/
isDirectory: true
Create dir META-INF/
ZipEntry: META-INF/container.xml
isDirectory: false
Create File META-INF/container.xml
ZipEntry: OPS/
isDirectory: true
Create dir OPS/
ZipEntry: OPS/chapter_001.xhtml
isDirectory: false
Create File OPS/chapter_001.xhtml
ZipEntry: OPS/chapter_002.xhtml
isDirectory: false
Create File OPS/chapter_002.xhtml
ZipEntry: OPS/chapter_003.xhtml
isDirectory: false
...
Create File OPS/toc-short.xhtml
ZipEntry: OPS/toc.xhtml
isDirectory: false
Create File OPS/toc.xhtml
Done extracting epub file

#1