I have a web app and the client has requested to see some reports. The approach has been to use iReport and show them the report on screen.
I have already asked something like this. But today I have discovered that the paths to the report files (jrxml) are absolute. So I have to change the program so it accepts relative paths. I have been trying to do this, but it seems that neither the jrxml or the compiled (.jasper) files accepts relative paths to neither compile or to fill the report.
This is what I have got this far:
//path is generated as request.getContextPath() + "/jrxmlFiles/"
public void generateReport(HttpServletResponse res, ConexionAdmin con, String path) throws Exception{
ServletOutputStream out = null;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
JasperDesign jasperDesign = JRXmlLoader.load(path);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
byte[] bytes = JasperRunManager.runReportToPdf(jasperReport, pars, con.initConexion());
res.setContentType("application/pdf");
res.setContentLength(bytes.length);
out = res.getOutputStream();
out.write(bytes, 0, bytes.length);
res.setHeader("Cache-Control", "cache");
res.setHeader("Content-Disposition", "attachment; filename=report.pdf");
res.setHeader("Pragma", "cache");
res.setContentLength(bos.size());
out.write(bos.toByteArray());
out.flush();
bos.close();
out.close();
res.flushBuffer();
}
This seems to work with absolute paths, but throws me:
Exception Message
net.sf.jasperreports.engine.JRException: java.io.FileNotFoundException
when changed to a relative path. I have searched the net with no success in how to change to my fits.
I have the javaDoc for the jasper API, but I rather not read it through if I can help it.
.jrxml
files to .jasper
files if the .jrxml
is being modified. Usually you can just load the .jasper
file and skip compilation altogether. It is much faster..jasper
and .jrxml
files outside of your web root.ROOT_DIR = "/full/path/to/reports/" IMAGE_DIR = $P{ROOT_DIR} + "images/" STYLES_DIR = $P{ROOT_DIR} + "styles/" SUBREPORT_DIR = $P{ROOT_DIR} + "subreports/" COMMON_DIR = $P{ROOT_DIR} + "common/"
$P{ROOT_DIR}
(e.g., $P{IMAGE_DIR}
is defined in terms of $P{ROOT_DIR}
).$P{ROOT_DIR}
in from your environment.Then use the expressions when necessary. For example, reference subreports as follows:
<subreportExpression>
<![CDATA[$P{SUBREPORT_DIR} + "subreport.jasper"]]>
</subreportExpression>
This will allow the subreport directory to vary between environments.
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