java - Corupt ZIP file servlet response for multiple file archive -

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i'm trying zip bundle of file's , return zip through servlet. works fine if have 1 file when try add more seems being appended first zipentry , zip archive gets corrupted.

private void writezipresponse(httpservletresponse response,   list<file> bundle) {     try {        bytearrayoutputstream bout=new bytearrayoutputstream();         zipoutputstream zout = new zipoutputstream(bout);        servletoutputstream out =response.getoutputstream();          (file file : bundle) {             fileinputstream fi = new fileinputstream(file);             byte bytes[] = new byte[(int)file.length()];            // read in bytes           int offset = 0;            int numread = 0;           while (offset < bytes.length && (numread=fi.read(bytes, offset, bytes.length-offset)) >= 0)  { offset += numread; }               // ensure bytes have been read in            if (offset < bytes.length) { throw new ioexception("could not read file "+file.getname()); }            fi.close();            zipentry zipentry = new zipentry(file.getname());           //zipentry.setcompressedsize(file.length());           zipentry.setsize(offset);           crc32 crc = new crc32();           crc.update(bytes);           zipentry.setcrc(crc.getvalue());           zout.putnextentry(zipentry);           zout.write(bytes, 0, offset);           zout.closeentry();           zout.finish();            fi.close();       }    zout.close();    response.setcontenttype("application/zip");   response.setheader("content-disposition",   "attachment; filename=hivseqdb.zip;");   out.write(bout.tobytearray());   out.flush();   out.close();    } catch (ioexception e) {    // todo auto-generated catch block   e.printstacktrace();  }  }

you need move zout.finish(); line outside of loop.


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