java - dofilter not giving pdf as output on response -

i trying show pdf output on browser. here code in dofilter class of servlet. getting byte array renders pdf correctly on line --> byte[] pdfarray = pdfconverter.converttodoc(bytes); see pdf file saved in --> file somefile = new file("c:\\log\\java2.pdf"); it's not outputting on servletresponse, mixed characters show up. appreciated. please inside dofilter method. have pdfconverter take whole site byte array , convert pdf.

import java.io.bytearrayoutputstream; import java.io.ioexception; import java.io.printwriter; import javax.servlet.filter; import javax.servlet.filterchain; import javax.servlet.filterconfig; import javax.servlet.servletexception; import javax.servlet.servletoutputstream; import javax.servlet.servletrequest; import javax.servlet.servletresponse; import javax.servlet.writelistener; import javax.servlet.http.httpservletresponse; import javax.servlet.http.httpservletresponsewrapper;  import org.slf4j.logger; import org.slf4j.loggerfactory;  public class itextfilter implements filter{      private static final logger logger = loggerfactory.getlogger(itextfilter.class);      private filterconfig filterconfig = null;     private string encoding;         private static class bytearrayservletstream extends servletoutputstream{             bytearrayoutputstream baos;             bytearrayservletstream(bytearrayoutputstream baos){                 this.baos = baos;             }             public void write(int param) throws ioexception{                 baos.write(param);             }             @override             public boolean isready() {                 // todo auto-generated method stub                 return true;             }             @override             public void setwritelistener(writelistener paramwritelistener) {                 // todo auto-generated method stub              }         }          private static class bytearrayprintwriter{             private bytearrayoutputstream baos = new bytearrayoutputstream();             private printwriter pw = new printwriter(baos);             private servletoutputstream sos = new bytearrayservletstream(baos);             public printwriter getwriter(){                 return pw;             }             public servletoutputstream getstream(){                 return sos;             }             byte[] tobytearray(){                 return baos.tobytearray();             }         }          public class charresponsewrapper extends httpservletresponsewrapper{             private bytearrayprintwriter output;             private boolean usingwriter;             public charresponsewrapper(httpservletresponse response){                 super(response);                 usingwriter = false;                 output = new bytearrayprintwriter();             }             public byte[] getbytearray(){                 return output.tobytearray();             }              @override             public servletoutputstream getoutputstream() throws ioexception{                 // error out, if in use                 if (usingwriter) {                     super.getoutputstream();                 }                 usingwriter = true;                 return output.getstream();             }              @override             public printwriter getwriter() throws ioexception{                 // error out, if in use                 if (usingwriter) {                     super.getwriter();                 }                 usingwriter = true;                 return output.getwriter();             }             public string tostring(){                 return output.tostring();             }         }          @override         public void init(filterconfig filterconfig) throws servletexception {             this.filterconfig = filterconfig;             this.encoding = filterconfig.getinitparameter("encoding");         }          public void destroy() {             this.filterconfig = null;         }         protected string selectencoding(servletrequest request) {             return (this.encoding);         }        public void dofilter(servletrequest request, servletresponse response, filterchain chain) throws ioexception, servletexception {         string encoding = selectencoding(request);         if (encoding != null)             request.setcharacterencoding(encoding);          httpservletresponse httpservletresponse = (httpservletresponse) response;          charresponsewrapper wrappedresponse = new charresponsewrapper((httpservletresponse)response);          logger.info("itextfilter invoked...passing on chain");         chain.dofilter(request, wrappedresponse);         logger.info("chain filter complete...processing respose now");         logger.info("response content type chain is: " + wrappedresponse.getcontenttype());          byte[] bytes = wrappedresponse.getbytearray();          pdfconverter pdfconverter = new pdfconverter();         byte[] pdfarray = pdfconverter.converttodoc(bytes);          httpservletresponse.setcontenttype("application/pdf; charset=utf-8");         httpservletresponse.setheader("content-disposition", "attachment; filename=\"report.pdf\"");         httpservletresponse.addheader("cache-control", "-1");         httpservletresponse.setcontenttype("application/pdf");         httpservletresponse.getoutputstream().write(pdfarray);         httpservletresponse.getoutputstream().close();     } } 

i found solution. coming gargled (mixed characters) because top of jsp page, changed page contenttype "text/html; charset=utf-8" "application/pdf; charset=utf-8"