如何借助jasperReport导出PDF文件呢？

HashMap parameter =    
         new HashMap();   
      parameter.put( "master_location_id", new BigDecimal(22) );   
  
      Connection con = getConnection();   
      JasperReport jasperReport =    
         JasperCompileManager.compileReport("/reports/reportFile.jrxml");   
      JasperPrint jasperPrint =    
         JasperFillManager.fillReport( jasperReport, parameter, con );   
           
      JasperExportManager.exportReportToPdfFile(   
         jasperPrint, "/reports/test123.pdf");