mysql - How to insert images from database? -


i want insert images database in details band in report in jaspersoft studio.
jpg-images saved in mysql in field imgdata of type longblob.
i`v tried put expressions in image element:

  1. $f{imgdata}
  2. myutil.getinputstream($f{imgdata})

in first case error:

net.sf.jasperreports.engine.jrexception: net.sf.jasperreports.engine.jrexception: unknown image source class [b

... , in second case error:

net.sf.jasperreports.engine.jrexception: net.sf.jasperreports.engine.fill.jrexpressionevalexception: error evaluating expression :  source text : myutil.getinputstream($f{imgdata})

my question: how insert images database jasperreports's report?

open xml view of .jrxml file. find code similar 

<field name="image" class="java.lang.object"/>   /* "image" must replaced actual field name */

and change 

<field name="image" class="java.io.inputstream"/>

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