java create NESTED zip recursively in memory -


this how create simple zip archive 3 files

    fileoutputstream fos = new fileoutputstream(new file("out.zip"));     bytearrayoutputstream baos = new bytearrayoutputstream();     try (zipoutputstream zos = new zipoutputstream(baos)) {          (int = 0; < 3; i++) {             string s = "hello world " + i;             zipentry entry = new zipentry("text" + + ".txt");             zos.putnextentry(entry);             zos.write(s.getbytes());             zos.closeentry();         }      }      baos.writeto(fos);

how can put zip inside zip recursively in 1 turn on fly? there way put zipoutputstream or zipentry inside each other?

edit:

solution mark suggested:

    fileoutputstream fos = new fileoutputstream(new file("out.zip"));     bytearrayoutputstream resultbytes = new bytearrayoutputstream();      bytearrayoutputstream zipoutstream = new bytearrayoutputstream();     try (zipoutputstream zos2 = new zipoutputstream(zipoutstream)) {          string s = "hello world ";         zipentry entry = new zipentry("text.txt");         zos2.putnextentry(entry);         zos2.write(s.getbytes());         zos2.closeentry();         zos2.close();     }      bytearrayoutputstream baos = new bytearrayoutputstream();     try (zipoutputstream zos = new zipoutputstream(baos)) {          zipentry entry = new zipentry("text.zip");         zos.putnextentry(entry);         zos.write(zipoutstream.tobytearray());         zos.closeentry();     }      baos.writeto(resultbytes);      resultbytes.writeto(fos);

for "inner" .zip file, use bytearrayoutputstream instead of fileoutputstream; zip built data in ram; can use resulting byte array data zipentry in outer .zip file.


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