Using JasperReports with a relative path

by
  • Paths must be absolute.
  • Only compile .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.
  • Store .jasper and .jrxml files outside of your web root.
  • Create the following parameters throughout all your reports: 
       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/"
  • Reference items relative to $P{ROOT_DIR} (e.g., $P{IMAGE_DIR} is defined in terms of $P{ROOT_DIR}).
  • Pass the value of $P{ROOT_DIR} in from your environment.
  • Loosely couple your application to any reporting framework you use.

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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