jasper reports - How to format java.time.LocalDateTime and java.time.LocalDate with pattern? -

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in following snipped property $f of class java.time.localdatetime or java.time.localdate.

<textfield pattern="ee. dd.mm.yyyy">     <reportelement...>     </reportelement>     <textfieldexpression><![cdata[$f{thelocaldatetime}]]></textfieldexpression> </textfield>

how can format property textfield pattern in jasper reports?

to use pattern attribute in current version of jasper-report date/time object need java.util.date class or 1 of it's subclasses.

the solution convert java.time.localdate , java.time.localdatetime

converting java.util.date

from java.time.localdate

<textfield pattern="ee. dd.mm.yyyy">     <reportelement...>     </reportelement>     <textfieldexpression><![cdata[java.util.date.from($f{thelocaldate}.atstartofday(java.time.zoneid.systemdefault()).toinstant())]]></textfieldexpression> </textfield>

from java.time.localdatetime

<textfield pattern="ee. dd.mm.yyyy">     <reportelement...>     </reportelement>     <textfieldexpression><![cdata[java.util.date.from($f{thelocaldatetime}.atzone(java.time.zoneid.systemdefault()).toinstant())]]></textfieldexpression> </textfield>

converting java.sql.timestamp

from java.time.localdate

<textfield pattern="ee. dd.mm.yyyy">     <reportelement...>     </reportelement>     <textfieldexpression><![cdata[java.sql.timestamp.valueof($f{thelocaldate}.atstartofday())]]></textfieldexpression> </textfield>

from java.time.localdatetime

<textfield pattern="ee. dd.mm.yyyy">     <reportelement...>     </reportelement>     <textfieldexpression><![cdata[java.sql.timestamp.valueof($f{thelocaldatetime})]]></textfieldexpression> </textfield>

note: applying pattern preferable solution, specially when exporting excel since correct class passed poi (hence excel recognize column date , apply same formatting in pattern)


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