CODEWITHSUNDEEP
javazip4j
Clio Orgyán
Clio Orgyán

Reputation: 310

Zip4j can't remove or overwrite files inside file

I'm trying to edit the contents of an odt file using zip4j (I tried using java ZipEntries but I couldn't even delete the entries from the file itself that's why I chose to use a library instead). I can confirm that the file I am trying to overwrite exits I can even read from it and tell when it was created so that part works. Now when I'm trying to edit the odt contents (removing or overwriting) Zip4j throws a ZipException which says: cannot rename modified zip file. What am I doing wrong?

 try
 {
      File temp = new File(f.getParent()+"/tmp/content.xml");
      new File(temp.getParent()).mkdirs();
      FileUtils.write(temp, "", encoding);
      net.lingala.zip4j.ZipFile zf = new net.lingala.zip4j.ZipFile(f.getPath());
      ZipParameters p = new ZipParameters();
      p.setEncryptionMethod(EncryptionMethod.NONE);
      p.setOverrideExistingFilesInZip(true);
      p.setFileNameInZip("content.xml");
      p.setCompressionMethod(CompressionMethod.DEFLATE);
      zf.addFile(temp, p);
 }
 catch (Exception e)
 {
      e.printStackTrace();
 }

Upvotes: 0

Views: 882

Answers (1)

Joop Eggen
Joop Eggen

Reputation: 109613

The zip file system with its jar:file: protocol is supported by Path & Files. A Path maintains its FileSystem, so one can use all operations.

    Path osPath = Paths.get("C:/ ... .odt");
    URI uri = URI.create("jar:" + osPath.toUri());

    Map<String, String> env = new HashMap<>();
    env.put("create", "true");
    try (FileSystem zipFS = FileSystems.newFileSystem(uri, env)) {
        Files.copy(zipFS.getPath("/media/image1.png"), osPath.resolveSibling("image1.png"),
            StandardCopyOption.REPLACE_EXISTING);
        Files.move(zipFS.getPath("/media/image2a.png"), zipFS.getPath("/media/image2.png"));
    }

Upvotes: 1

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