如何解决org.apache.commons.compress.archivers.zip.UnsupportedZipFeatureException（epub mimetype）？

Question

当解压缩zip文件时，我的jboss显示错误。

错误消息

14:36:20,663 ERROR [STDERR] org.apache.commons.compress.archivers.zip.UnsupportedZipFeatureException: unsupported feature data descriptor used in entry mimetype 
14:36:20,663 ERROR [STDERR]  at org.apache.commons.compress.archivers.zip.ZipArchiveInputStream.read(ZipArchiveInputStream.java:245) 
14:36:20,663 ERROR [STDERR]  at java.io.InputStream.read(Unknown Source) 

这里的test.epub

Length Method Size Cmpr Date Time CRC-32 Name 
-------- ------ ------- ---- ---------- ----- -------- ---- 
    20 Stored  20 0% 03-18-2013 14:39 2cab616f mimetype 
    0 Stored  0 0% 03-18-2013 10:42 00000000 META-INF/ 
265 Defl:N  187 29% 03-18-2013 10:42 4d7842ce META-INF/container.xml 
1048 Defl:N  271 74% 03-18-2013 10:42 c04d123d META-INF/encryption.xml 
    0 Stored  0 0% 03-18-2013 12:05 00000000 OEBPS/ 
1014 Defl:N  530 48% 03-18-2013 12:05 cb8218d1 OEBPS/9.html 

LIB的entrys的一部分：公地压缩-1.4.jar 1.5版本已经显示了同样的错误味精。

有人知道为什么发生错误，我如何解决？

添加代码

public void unzip(InputStream is, File destDir, String charsetName) 
     throws IOException { 
    ZipArchiveInputStream zis; 
    ZipArchiveEntry entry; 
    String name; 
    File target; 
    int nWritten = 0; 
    BufferedOutputStream bos; 
    byte[] buf = new byte[1024 * 8]; 
    zis = new ZipArchiveInputStream(is, charsetName, false); 
    while ((entry = zis.getNextZipEntry()) != null) { 
     name = entry.getName(); 
     target = new File(destDir, name); 
     if (entry.isDirectory()) { 
      target.mkdirs(); 
     } else { 
      Util.createParentDirectory(target); 
      target.createNewFile(); 
      bos = new BufferedOutputStream(new FileOutputStream(target)); 
      while ((nWritten = zis.read(buf)) >= 0) { 
       bos.write(buf, 0, nWritten); 
      } 
      bos.close(); 
      debug("file : " + name); 
     } 
    } 
    zis.close(); 
} 

当我使用其他LIB（Java.util.zip），还示出了下面的异常。

java.util.zip.ZipException: only DEFLATED entries can have EXT descriptor 
    at java.util.zip.ZipInputStream.readLOC(Unknown Source) 
    at java.util.zip.ZipInputStream.getNextEntry(Unknown Source) 

Answer 1

发生这种情况是因为你有这个“mimetype”文件附加的“数据描述符”。默认情况下（和规范）只允许DEFLATED文件具有此功能，但是您已将其保存在STORED（解压缩ZIP中的文件）。

只需使用allowStoredEntriesWithDataDescriptor = true构造您的ZipArchiveInputStream即可。

public ZipArchiveInputStream(InputStream inputStream, 
         String encoding, 
         boolean useUnicodeExtraFields, 
         boolean allowStoredEntriesWithDataDescriptor)