Convert bytes to File and zip it into a folder using Java in Spring -


i'm trying generate pdf , works fine i'm flushing out bytes browser. now, scenario changed. there multiple files now, how can create these bytes , put in single zip folder , flush it. tried google it, of sites take me create zip stream of file.

business logic 

string[] documents = {"2","3","4","5"}; servletoutputstream out = response.getoutputstream(); (string documentkey: documents) {                if(tkey!= null && !tkey.isempty() &&  documentkey != null && !documentkey.isempty()) {                     byte[] documentbytes =  myservice.generatedocument(tkey, documentkey);                   writebytestofile(documentbytes,); --> how can mention file name here?                     string documenttype = myutil.getdocumenttype(documentkey);                     response.setheader("content-disposition", "attachment;filename="+documenttype);                     response.setcontenttype("application/pdf");                     response.setheader("expires", "0");                     response.setheader("cache-control", "must-revalidate, postcheck=0, pre-check=0");                     response.setheader("pragma", "public");                     response.setcontentlength(documentbytes.length);                      out.write(documentbytes);                     out.flush();                     out.close();                     logger.debug("********** document generated **********");                 }             }

another method in same class

public void writebytestofile(byte[] bfile, string filedest) {      try (fileoutputstream fileouputstream = new fileoutputstream(filedest)) {         fileouputstream.write(bfile);     } catch (ioexception e) {         e.printstacktrace();     } }

the bytes should converted file initially. but, how can know file destination? should done automatically. file name can kept 1.pdf,2.pdf,3.pdf,4.pdf

i need these 4 files should kept under folder , gets flushed

how can put these documents in zip folder , downloaded?


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