Question

I have to make a JasperReport on serverside (Tomcat + gwt).
I try to run a hello-world

public class AuthorReport {
 public static void generate() {
try {
  String reportSource = "resources/authorReport.jasper";

  JasperReport jasperReport = JasperCompileManager
    .compileReport(reportSource);

  JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport,
    new HashMap(), new JREmptyDataSource());

  JasperExportManager.exportReportToHtmlFile(jasperPrint, "hello_report.html");


} catch (Exception e) {
  e.printStackTrace();
}
}
}

I get no exceptions, but I cant realise where is the generated file and whether it is generated at all.

Maybe I do have to integrate somehow Tomcat and JasperReports?

Answer 1

You have to specify this location in the second parameter of JasperFillManager.fillReport.

public class AuthorReport {

    public static void generate() {
        try {
           String reportSource = "resources/authorReport.jasper";

           JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);

           Map<String, Object> params = new HashMap<String, Object>();
           params.put(JRParameter.REPORT_FILE_RESOLVER, new SimpleFileResolver(new File(youPath)));

           JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());

           JasperExportManager.exportReportToHtmlFile(jasperPrint, "hello_report.html");
       } catch (Exception e) {
           e.printStackTrace();
       }
   }
}

Good luck!