我试图解压缩压缩文件（此文件包含许多子文件夹和文件）。
I am not able to create sub-folders while unzipping the file.
每次我收到错误说：
No such file or directory.
我搜索过很多关于这个的信息：
但是，没有任何帮助我。
以下是我的尝试：
public class UnZipper {
private static final String TAG = "UnZip";
private String mFileName, mDestinationPath;
public UnZipper(String fileName, String destinationPath) {
mFileName = fileName;
mDestinationPath = destinationPath;
}
public String getFileName() {
return mFileName;
}
public String getDestinationPath() {
return mDestinationPath;
}
// shrikant
public void unzip() {
String fullPath = mFileName;
Log.d(TAG, "unzipping " + mFileName + " to " + mDestinationPath);
doInBackground(fullPath, mDestinationPath);
}
// shrikant: I have changed return type from Boolean to boolean.
protected boolean doInBackground(String filePath, String destinationPath) {
File archive = new File(filePath);
boolean returnValue = false;
try {
ZipFile zipfile = new ZipFile(archive);
for (Enumeration e = zipfile.entries(); e.hasMoreElements();) {
ZipEntry entry = (ZipEntry) e.nextElement();
try {
unzipEntry(zipfile, entry, destinationPath);
Log.d("Unzipped", entry.getName());
returnValue = true;
} catch (Exception ex) {
Log.e(TAG,
"Error while extracting file: " + entry
+ ex.getMessage());
}
}
} catch (Exception e) {
Log.e(TAG, "Error while extracting file " + archive, e);
// return false;
}
return returnValue;
}
// shrikant: I have changed return type from void to boolean.
/**
* Unzips the zipped file into outputDir path.
*
* @param zipfile
* @param entry
* @param outputDir
* @throws IOException
*/
private void unzipEntry(ZipFile zipfile, ZipEntry entry, String outputDir)
throws IOException {
Log.d("CURRENT ZIP", entry.getName());
String _dir = null, fileName = null;
if (entry.getName().contains("\\")) {
_dir = entry.getName().substring(0, entry.getName().indexOf('\\'));
createDir(new File(outputDir, _dir));
fileName = entry.getName().substring(entry.getName().indexOf('\\'));
}
// Change by Prashant : To Remove "/" from file Name Date : 5/01/2011
if (fileName.toString().startsWith("\\")) {
fileName = fileName.substring(1); // End
}
if (_dir != "")
outputDir = outputDir + "/" + _dir;
File outputFile = new File(outputDir, fileName);
if (!outputFile.getParentFile().exists()) {
createDir(outputFile.getParentFile());
}
Log.d("OUTPUT FILE", outputDir + fileName);
Log.v(TAG, "Extracting: " + entry);
Log.d("FOUND inside unzipEntry()", entry.getName());
BufferedInputStream inputStream = new BufferedInputStream(
zipfile.getInputStream(entry));
// **here I am getting error.**
BufferedOutputStream outputStream = new BufferedOutputStream(
new FileOutputStream(outputFile));
// **above line.**
try {
copy(inputStream, outputStream);
} finally {
outputStream.close();
inputStream.close();
}
}
private void createDir(File dir) {
if (dir.exists()) {
return;
}
Log.v(TAG, "Creating dir " + dir.getName());
if (!dir.mkdirs()) {
throw new RuntimeException("Cannot create dir " + dir);
}
}
private void copy(BufferedInputStream input, BufferedOutputStream output)
throws IOException {
byte[] buffer = new byte[4096];
int size;
while ((size = input.read(buffer)) != -1)
output.write(buffer, 0, size);
}
}
我的问题是 :(请查看代码）
当我呼叫unzipEntry()时，遇到子文件夹时，它会传递类似“/data/abc.ext”的内容，但我的文件系统不包含任何名为“数据<的文件夹” / strong>“，我甚至试图创建它，但未能这样做。
那么如何创建从压缩文件到目标路径的子文件夹？
我甚至尝试过方法：
if(entry.isDirectory) {
// create directory
}
但是这不会被调用，因为unzipEntry()（请查看for() loop）直接传递子文件夹下的文件。
请帮我解决这个问题。
谢谢。
答案 0 :(得分：6)
哦，是的！我已经解决了.. :)）
我编写了以下函数，如果需要，将递归创建子文件夹。
这是经过试用和测试的功能，可以成功解压缩任何文件。
/**
* Unzips the file (recursively creates sub-folder if exists.)
*
* @param tempFileName
* The zip file.
* @param destinationPath
* The destination path where unzipped file will be saved.
*/
public void unzipFile(String tempFileName, String destinationPath) {
try {
int index = destinationPath.lastIndexOf("\\");
String fileString = destinationPath.substring(index);
File extFile = new File("/mnt/sdcard/courses1", fileString);
if(!extFile.exists()) {
createDir(extFile);
}
byte[] buffer = new byte[1024];
FileInputStream fin = new FileInputStream(tempFileName);
ZipInputStream zin = new ZipInputStream(fin);
ZipEntry zipentry = null;
if (!(zin.available() == 0)) {
byte[] startBuffer = new byte[8];
while ((zipentry = zin.getNextEntry()) != null) {
String zipName = zipentry.getName();
if (zipName.startsWith("/")) {
zipName = zipentry.getName();
} else if (zipName.startsWith("\\")) {
zipName = zipentry.getName();
} else {
zipName = "/" + zipentry.getName();
}
String fileName = destinationPath + zipName;
fileName = fileName.replace("\\", "/");
fileName = fileName.replace("//", "/");
if (zipentry.isDirectory()) {
createDir(new File(fileName));
continue;
}
String name = zipentry.getName();
int start, end = 0;
while (true) {
start = name.indexOf('\\', end);
end = name.indexOf('\\', start + 1);
if (start > 0)
"check".toString();
if (end > start && end > -1 && start > -1) {
String dir = name.substring(1, end);
createDir(new File(destinationPath + '/' + dir));
// name = name.substring(end);
} else
break;
}
File file = new File(fileName);
FileOutputStream tempDexOut = new FileOutputStream(file);
int BytesRead = 0;
if (zipentry != null) {
if (zin != null) {
while ((BytesRead = zin.read(buffer)) != -1) {
tempDexOut.write(buffer, 0, BytesRead);
}
tempDexOut.close();
}
}
}
}
} catch (Exception e) {
Log.e("Exception", e.getMessage());
}
}
我希望它有助于某人。 ：）
谢谢。