I am using JasperReports 6.0.0 under ZK EE 6.5.4. I have created a .zul file with component Jasperreport, and an JRXML with this column header definiton:

----------

<columnHeader>
<band height="25" splitType="Stretch">
<staticText>
<reportElement mode="Opaque" x="0" y="0" width="555" height="20" backcolor="#70A9A9" />
<textElement />
<text><![CDATA[]]></text>
</staticText>
<textField>
<reportElement mode="Transparent" x="0" y="0" width="80" height="20" />
<textElement verticalAlignment="Middle">
<font size="12" isBold="true"/>
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$P

{headerTerm}

]]>
</textFieldExpression>
</textField>
<textField>
<reportElement mode="Transparent" x="80" y="0" width="200" height="20" />
<textElement textAlignment="Center" verticalAlignment="Middle">
<font size="12" isBold="true"/>
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$P

{headerDef}

]]>
</textFieldExpression>
</textField>
<textField>
<reportElement mode="Transparent" x="280" y="3" width="100" height="20" />
<textElement textAlignment="Center" verticalAlignment="Middle">
<font size="12" isBold="true"/>
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$P

{headerGlossary}

]]>
</textFieldExpression>
</textField>
</band>
</columnHeader>

----------

The static text is used to underlay the column header with a colour.

Exporting the report under ZK with HTML displays only the text, not the colour.
Exporting the report under ZK with PDF displays the text and the colour.

For testing I tried JasperExportManager.exportReportToHtmlFile (without ZK) and both - text and colour - are displayed.

The generated html source code is different.

I already found out that ZK is using net.sf.jasperreports.engine.export.JRHtmlExporer to export the report.
This method is declared as deprecated and has been replaced by net.sf.jasperreports.engine.export.HtmlExporter

I tried both exporters and the result is that

• with the *JR*HtmlExporter as used by ZK the colour is missing, and
• using the HTMLExporter everything is fine.

As the ZK Jasperreport class creates the Exporter object in its private method doReport(), I have no chance to overwrite it.

Is there any possibility to use the HTMLExporter instead of JRHTMLExporter?

And it seems that also the current ZK 7 release still uses the deprecated exporter.