generate pdf file from jasper report with servlet java code -

i have jasper report, put in same package servlets, need generate pdf file it, code doesn't work , doesn't gives error

public void print(string numbac , httpservletrequest request,   httpservletresponse response) {     try {                   jasperdesign jasperdesign = jrxmlloader                 .load("fiche.jrxml");         string sql = "select * etudiant "                 + "inner join filiere on etudiant.code_f=filiere.code_f "                 + "inner join lieu_nais on etudiant.code_lieu=lieu_nais.code_lieu "                 + "inner join montant on etudiant.code_m=montant.code_m bac='"                 + numbac + "'";         jrdesignquery newquery = new jrdesignquery();         newquery.settext(sql);         jasperdesign.setquery(newquery);         jasperreport report = jaspercompilemanager                 .compilereport(jasperdesign);         //jasperprint print = jasperfillmanager.fillreport(report, null, cnx);         //jasperviewer.viewreport(print);          byte[] bytestream;         bytestream = jasperrunmanager.runreporttopdf(report, null, cnx);         outputstream outstream = response.getoutputstream();         response.setheader("content-sisposition", "inline,filename="+download_file_name);         response.setcontenttype(file_type);         response.setcontentlength(bytestream.length);         outstream.write(bytestream, 0, bytestream.length);      } catch (exception e) {         e.printstacktrace();     } } 

even if want generate jasper preview doesn't shown (code in comment)

first of all, have spelling error here:

response.setheader("content-sisposition", "inline,filename="+download_file_name); 

it should "disposition" instead of "sisposition":

response.setheader("content-disposition", "inline,filename="+download_file_name); 

also, try using "attachment" instead of "inline":

response.setheader("content-disposition", "attachment,filename="+download_file_name); 

and flush , close outstream:

outstream.flush(); outstream.close(); 

hope helps!