我目前正在开发一个Android应用程序，我在其中下载.zip存档然后解压缩它。存档的下载正确完成。我可以直接在手机或计算机上手动解压缩。
但是，当我尝试以编程方式解压缩归档时，我得到一个UTFDataFormatException。我尝试通过添加：
强制系统编码System.setProperty("file.encoding", "UTF-8");
或者处理文件的名称：
filename = new String(ze.getName().getBytes("UTF-8"));
我的解压缩功能中是否遗漏了一些内容？
private boolean unzip(String path, String zipname)
{
InputStream is;
ZipInputStream zis;
try
{
String filename;
is = new FileInputStream(path + zipname);
zis = new ZipInputStream(new BufferedInputStream(is));
ZipEntry ze;
byte[] buffer = new byte[4096];
int count;
while ((ze = zis.getNextEntry()) != null)
{
filename = ze.getName();
if (ze.isDirectory())
{
File fmd = new File(path + filename);
fmd.mkdirs();
continue;
}
FileOutputStream fout = new FileOutputStream(path + filename);
while ((count = zis.read(buffer)) != -1)
{
fout.write(buffer, 0, count);
}
fout.close();
zis.closeEntry();
}
zis.close();
}
catch(IOException e)
{
e.printStackTrace();
return false;
}
return true;
}
异常消息下方：
java.io.UTFDataFormatException: bad byte at 72
答案 0 :(得分：0)
毕竟，我使用了Zip4j库，效果很好。这是一个旧库，由于gradle而无法维护且无法调用，但它解决了我的问题（http://www.lingala.net/zip4j/）。
try
{
ZipFile zipFile = new ZipFile(sourceFile);
zipFile.extractAll(destinationPath);
}
catch (ZipException e)
{
e.printStackTrace();
}
答案 1 :(得分：-1)
试试这个：
public static boolean unzip(String zipFile, String location) {
if (!location.endsWith("/")) {
location += "/";
}
if (!zipFile.endsWith(".zip") || !new File(location + zipFile).exists()) {
return false;
}
int size;
byte[] buffer = new byte[1024];
try {
File f = new File(location);
if (!f.isDirectory()) {
f.mkdirs();
}
ZipInputStream zin = new ZipInputStream(new BufferedInputStream(new FileInputStream(location + zipFile), 1024));
try {
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null) {
String path = location + ze.getName();
File unzipFile = new File(path);
if (ze.isDirectory()) {
if (!unzipFile.isDirectory()) {
unzipFile.mkdirs();
}
} else {
// check for and create parent directories if they don't exist
File parentDir = unzipFile.getParentFile();
if (null != parentDir) {
if (!parentDir.isDirectory()) {
parentDir.mkdirs();
}
}
// unzip the file
FileOutputStream out = new FileOutputStream(unzipFile, false);
BufferedOutputStream fout = new BufferedOutputStream(out, 1024);
try {
while ((size = zin.read(buffer, 0, 1024)) != -1) {
fout.write(buffer, 0, size);
}
zin.closeEntry();
} finally {
try {
fout.flush();
fout.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
} finally {
try {
zin.close();
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
答案 2 :(得分：-1)
试试这个，
public class DecompressZip{
private static final int BUFFER_SIZE=8192;
private String _zipFile;
private String _location;
private byte[] _buffer;
/**
* Constructor.
*
* @param zipFile Fully-qualified path to .zip file
* @param location Fully-qualified path to folder where files should be written.
* Path must have a trailing slash.
*/
public DecompressZip(String zipFile, String location)
{
_zipFile = zipFile;
_location = location;
_buffer = new byte[BUFFER_SIZE];
dirChecker("");
}
public void unzip()
{
FileInputStream fin = null;
ZipInputStream zin = null;
OutputStream fout = null;
File outputDir = new File(_location);
File tmp = null;
try {
fin = new FileInputStream(_zipFile);
zin = new ZipInputStream(fin);
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null)
{
Log.d("Decompress", "Unzipping " + ze.getName());
Log.d("Decompress", "FileSize " + ze.getSize());
Log.d("Decompress", "compressedSize " + ze.getCompressedSize());
if (ze.isDirectory())
{
dirChecker(ze.getName());
}
else
{
tmp = File.createTempFile( "decomp", ".tmp", outputDir );
fout = new BufferedOutputStream(new FileOutputStream(tmp));
DownloadFile.copyStream( zin, fout, _buffer, BUFFER_SIZE );
zin.closeEntry();
fout.close();
fout = null;
tmp.renameTo( new File(_location + ze.getName()) );
tmp = null;
}
}
zin.close();
zin = null;
}
catch (IOException e)
{
throw new RuntimeException(e);
}
finally
{
if ( tmp != null ) { try { tmp.delete(); } catch (Exception ignore) {;} }
if ( fout != null ) { try { fout.close(); } catch (Exception ignore) {;} }
if ( zin != null ) { try { zin.closeEntry(); } catch (Exception ignore) {;} }
if ( fin != null ) { try { fin.close(); } catch (Exception ignore) {;} }
}
}
private void dirChecker(String dir)
{
File f = new File(_location + dir);
if (!f.isDirectory())
{
f.mkdirs();
}
}}
答案 3 :(得分：-1)
尝试以下代码。我这样做是为了下载压缩图像。
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.ContextWrapper;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.ParcelFileDescriptor;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class MainActivity extends AppCompatActivity {
private ProgressDialog simpleWaitDialog;
private Bitmap table1,seat1,seat2,seat3,seat4,seat5,dummy;
private ImageView tableIv,seat1Iv,seat2Iv,seat3Iv,seat4Iv,seat5Iv,overlay;
File _zipFile;
InputStream _zipFileStream;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tableIv=(ImageView)findViewById(R.id.iv);
seat1Iv=(ImageView)findViewById(R.id.seat1IV);
seat2Iv=(ImageView)findViewById(R.id.seat2IV);
seat3Iv=(ImageView)findViewById(R.id.seat3IV);
seat4Iv=(ImageView)findViewById(R.id.seat4IV);
seat5Iv=(ImageView)findViewById(R.id.seat5IV);
overlay=(ImageView)findViewById(R.id.overlayIV);
///data/user/0/com.example.ayyappaboddupalli.zipperunzipper/app_zipper1/themeparts1.zip/dummy/6_player.jpg -location where files stored
ContextWrapper wrapper=new ContextWrapper(this);
File sd = wrapper.getDir("zipper1", MODE_PRIVATE);
File dest = new File(sd, "theme1.zip");
File target = new File(sd, "themeparts1.zip");
if(target.exists())
{
commonCaller(dest,target,sd);
}
else
{
new ImageDownloader().execute();
commonCaller(dest,target,sd);
}
}
private void uriToBitmap(Uri selectedFileUri, String name) {
try {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(selectedFileUri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
assignBitmapToView(image,name);
parcelFileDescriptor.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private void assignBitmapToView(Bitmap image, String name) {
String toCompare=name.toString().substring(name.lastIndexOf("/")+1,name.lastIndexOf("."));
switch (toCompare)
{
case "dummy":
dummy=image;
overlay.setImageBitmap(dummy);
break;
case "6_player":
table1=image;
tableIv.setImageBitmap(table1);
break;
case "f1":
seat1=image;
seat1Iv.setImageBitmap(seat1);
break;
case "f2":
seat2=image;
seat2Iv.setImageBitmap(seat2);
break;
case "f3":
seat3=image;
seat3Iv.setImageBitmap(seat3);
break;
case "f4":
seat4=image;
seat4Iv.setImageBitmap(seat4);
break;
case "f5":
seat5=image;
seat5Iv.setImageBitmap(seat5);
break;
}
}
public void commonCaller(File dest,File target,File sd)
{
if(sd.exists()) {
// unzip(dest.getAbsolutePath(), target.getAbsolutePath());
try {
unzipFileIntoDirectory(dest,target);
} catch (Exception e) {
e.printStackTrace();
}
}
}
/*public void unzip(String _zipFile, String _targetLocation) {
//create target location folder if not exist
_dirChecker(_zipFile);
try {
FileInputStream fin = new FileInputStream(_zipFile);
ZipInputStream zin = new ZipInputStream(fin);
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null) {
//create dir if required while unzipping
if (ze.isDirectory()) {
_dirChecker(ze.getName());
} else {
FileOutputStream fout = new FileOutputStream(_targetLocation + ze.getName());
for (int c = zin.read(); c != -1; c = zin.read()) {
fout.write(c);
}
zin.closeEntry();
fout.close();
}
}
zin.close();
} catch (Exception e) {
System.out.println(e);
}
}*/
public void unzip() {
try {
ContextWrapper cws=new ContextWrapper(this);
File sd=cws.getDir("zipper1",MODE_PRIVATE);
File dest=new File(sd,"parts1");
dest.mkdirs();
// final String ROOT_LOCATION = "/sdcard";
Log.i("", "Starting to unzip");
InputStream fin = _zipFileStream;
if(fin == null) {
fin = new FileInputStream(_zipFile);
}
ZipInputStream zin = new ZipInputStream(fin);
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null) {
Log.v("", "Unzipping " + ze.getName());
if(ze.isDirectory()) {
_dirChecker(dest + "/" + ze.getName());
} else {
FileOutputStream fout = new FileOutputStream(new File(sd.getPath(), ze.getName()));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int count;
// reading and writing
while((count = zin.read(buffer)) != -1)
{
baos.write(buffer, 0, count);
byte[] bytes = baos.toByteArray();
fout.write(bytes);
baos.reset();
}
fout.close();
zin.closeEntry();
}
}
zin.close();
Log.i("", "Finished unzip");
} catch(Exception e) {
Log.e("", "Unzip Error", e);
}
}
public void unzipFileIntoDirectory(File archive, File destinationDir)
throws Exception {
final int BUFFER_SIZE = 1024;
BufferedOutputStream dest = null;
FileInputStream fis = new FileInputStream(archive);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
ZipEntry entry;
File destFile;
while ((entry = zis.getNextEntry()) != null) {
destFile=new File(destinationDir,entry.getName());
uriToBitmap(Uri.fromFile(destFile),entry.getName());
// destFile = FilesystemUtils.combineFileNames(destinationDir, entry.getName());
if (entry.isDirectory()) {
destFile.mkdirs();
continue;
} else {
int count;
byte data[] = new byte[BUFFER_SIZE];
destFile.getParentFile().mkdirs();
FileOutputStream fos = new FileOutputStream(destFile);
dest = new BufferedOutputStream(fos, BUFFER_SIZE);
while ((count = zis.read(data, 0, BUFFER_SIZE)) != -1) {
dest.write(data, 0, count);
}
dest.flush();
dest.close();
fos.close();
}
}
zis.close();
fis.close();
}
private void _dirChecker(String dir) {
File f = new File(dir);
if(!f.isDirectory()) {
f.mkdirs();
}
}
private class ImageDownloader extends AsyncTask {
@Override
protected Object doInBackground(Object[] params) {
String url="testing/dummy.zip";
return downloadBitmap(url);
}
@Override
protected void onPreExecute() {
Log.i("Async-Example", "onPreExecute Called");
simpleWaitDialog = new ProgressDialog(MainActivity.this);
simpleWaitDialog.setMessage( "Downloading Image");
simpleWaitDialog.show();
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
simpleWaitDialog.dismiss();
}
private Bitmap downloadBitmap(String url) {
downloadImage(url);
return null;
}
}
public void downloadImage(String urlPart) {
URL url = null;
FileDescriptor fd;
try {
int count;
url = new URL(urlPart);
InputStream input = new BufferedInputStream(url.openStream());
ContextWrapper contextWrapper=new ContextWrapper(this);
File sd = contextWrapper.getDir("zipper1", MODE_PRIVATE);
File dest = new File(sd, "theme1.zip");
_zipFileStream=input;
// File file = new File(downloadLocation);
FileOutputStream output = new FileOutputStream(dest); //context.openFileOutput("content.zip", Context.MODE_PRIVATE);
fd = output.getFD();
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),"success",Toast.LENGTH_LONG).show();
}
});
//old code
/* ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int n = 0;
while (-1 != (n = in.read(buf))) {
out.write(buf, 0, n);
}
out.close();
in.close();
byte[] response = out.toByteArray();
String zipString = Base64.encodeToString(response, Base64.DEFAULT);
ContextWrapper contextWrapper=new ContextWrapper(this);
File sd = contextWrapper.getDir("zipper1", MODE_PRIVATE);
File dest = new File(sd, "theme1.zip");
FileOutputStream fos = new FileOutputStream(dest);
fos.write(zipString.getBytes());
fos.close();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),"success",Toast.LENGTH_LONG).show();
}
});*/
}
catch (Exception e) {
e.printStackTrace();
}
}
}