export to pdf creates balnk page

[greenf]

I've try to create pdf from jrxml inside StringBuffer. I do it by converting Stringbuffer -> String -> bytes[] -> ByteArrayInputStream -> JasperCompileManager.compileReport( stream )

 

It creates balnk file.

However, if I write stream to the file and try to convert file to pdf, it works fine.

 

Is anybody can tell me what the reason of this.

Code:

        byte[] bytes = buf.toString().getBytes();
        InputStream stream = new ByteArrayInputStream( bytes );

        //Convert stream to Jasper Report and JasperReport to PDF
        JasperReport jasperReport;
        JasperPrint jasperPrint;
        StringBuffer result;
        try {
            jasperReport = JasperCompileManager.compileReport( stream );
            jasperPrint =
                    JasperFillManager.fillReport(
                        jasperReport, new HashMap(), new JREmptyDataSource() );
            bytes = JasperExportManager.exportReportToPdf( jasperPrint );
            result = new StringBuffer( new String( bytes) );
            LOG.info( "Summary file created rn" );
        } catch (JRException e) {
            result = new StringBuffer();
            LOG.info( "Summary creation failed rn" + e );
        }
        buf = new StringBuffer();
        return result; 

[lucianc]

PDF is a binary file format (and not a text file format), so converting the data to a String corrupts it. You need to keep the binary data as is, i.e. as a byte array.

 

HTH,

Lucian