generate pdf file from jasper report with servlet java code - servlets

Question

I have a jasper report, I put it in the same package as servlets, I need to generate pdf file from it, but the code doesn't work and doesn't gives any error
public void print(String numBac , HttpServletRequest request,
HttpServletResponse response) {
try {
JasperDesign jasperDesign = JRXmlLoader
.load("fiche.jrxml");
String sql = "SELECT * FROM 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 WHERE 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 I want to generate jasper preview it doesn't shown up (code in comment)

Answer 1

What is baos for? Do you have to flush/close sos?
You can use bellow code. Here is complete Example using java servlet
Please download bellow jar file..
jasperreports-5.0.1.jar
commons-logging-1.1.2.jar
commons-digester-2.1.jar
commons-collections-3.2.1-1.0.0.jar
commons-beanutils-1.8.3.jar
groovy-all-2.1.3.jar
com.lowagie.text-2.1.7.jar
your database library
You can use like
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
String path = "D:\\Software\\iReport-5.0.0-windows-installer\\u\\report4.jrxml";
JasperReport jasReport = JasperCompileManager.compileReport(path);
System.out.println("Jasper Report : " + jasReport);
//Database connection
Connection con = /*Database Connection*/;
System.out.println(con);
//If You have any Paramert use bellow like
Map paramMap = new HashMap();
paramMap.put("id", request.getParameter("id"));
//If You don't have parameter pass null instead of paramMap
JasperPrint jasPrint = JasperFillManager.fillReport(jasReport, paramMap, con);
System.out.println("Jasper Print : " + jasPrint);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ServletOutputStream sos = response.getOutputStream();
response.setContentType("application/pdf");
JasperExportManager.exportReportToPdfStream(jasPrint, sos);
} catch (JRException ex) {
Logger.getLogger(Tests.class.getName()).log(Level.SEVERE, null, ex);
}
}

Answer 2

First of all, you have a spelling error here:
response.setHeader("Content-Sisposition", "inline,filename="+DOWNLOAD_FILE_NAME);
It should say "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 and close the outStream:
outStream.flush();
outStream.close();
Hope it helps!