Java unzip zipfile with Unicode file names

Question

How to unzip a zip file with a Unicode file name? This is my code:

try { ZipInputStream zis = new ZipInputStream( new FileInputStream(zipFile)); ZipEntry ze = zis.getNextEntry(); System.setProperty("file.encoding", "UTF-8"); while (ze != null) { String fileName = new String(ze.getName().getBytes("UTF-8")); System.out.println(fileName); File newFile = new File(outputFolder + File.separator + fileName ); BufferedOutputStream outStream = new BufferedOutputStream(new FileOutputStream(newFile)); OutputStreamWriter osw = new OutputStreamWriter(outStream, Charset.forName("UTF-8")); int ch; StringBuffer buffer1 = new StringBuffer(); while ((ch = zis.read()) > -1) { buffer1.append((char) ch); } osw.write(buffer1.toString()); osw.close(); outStream.close(); ze = zis.getNextEntry(); } zis.closeEntry(); zis.close(); } catch (IOException ex) { ex.printStackTrace(); } 

but I get an error: UTFDataFormatException :

 06-05 08:46:33.394: W/System.err(777): java.io.UTFDataFormatException: bad second or third byte at 6 06-05 08:46:33.394: W/System.err(777): at java.nio.charset.ModifiedUtf8.decode(ModifiedUtf8.java:56) 06-05 08:46:33.426: W/System.err(777): at java.util.zip.ZipInputStream.getNextEntry(ZipInputStream.java:270) 06-05 08:46:33.426: W/System.err(777): at com.learnlang.utility.ZipManager.unZipIt(ZipManager.java:62) 06-05 08:46:33.434: W/System.err(777): at com.learnlang.HomeActivity$progressThread.run(HomeActivity.java:317) 

My ZipManager class.

How to solve this problem?

Answer 1

According to the exception, it seems that your file is actually not in UTF-8 encoding.

Also, the problem is not the file name. This line:

  String fileName = new String(ze.getName().getBytes("UTF-8")); 

doesn't make sense because ze.getName() is already the correct java string.