Colour issue in generated xls file with JasperReports - jasper-reports

Question

I am using Spring and iReport to generate jasper reports in excel format. All is working fine but I am having a single issue that the background colour of my reports in iReport is grey, but I am getting purplish hue in my generated Excel file.
I am setting Create Custom Palette to true, still it is not having any effect.
My Jrxml:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="Charges Applicable" pageWidth="792" pageHeight="612" orientation="Landscape" whenNoDataType="AllSectionsNoDetail" columnWidth="752" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" whenResourceMissingType="Empty" >
<property name="net.sf.jasperreports.export.xls.white.page.background" value="false"/>
<subDataset name="Table Dataset 1" >
<parameter name="ContractId" class="java.lang.String"/>
<parameter name="VersionNo" class="java.lang.String"/>
<queryString>
<![CDATA[SELECT S.TERM_COMMENTS FROM FCM_TX_TERMINATION_CHARGE_T S
WHERE S.CONTRACT_ID=$P{ContractId} AND S.VERSION_NO=$P{VersionNo}]]>
</queryString>
<field name="TERM_COMMENTS" class="java.lang.String"/>
</subDataset>
<parameter name="ContractId" class="java.lang.String"/>
<parameter name="VersionNo" class="java.lang.String"/>
<queryString>
<![CDATA[SELECT F.OFFSET_ABLE_AGAINST_SLA_FLAG SLA_PENALTY_APPLICABLE
FROM FCM_TX_BASIC_CONTRACT_DTLS_T F
WHERE F.CONTRACT_ID=$P{ContractId} AND F.VERSION_NO=$P{VersionNo}]]>
</queryString>
<field name="SLA_PENALTY_APPLICABLE" class="java.lang.String"/>
<summary>
<band height="120" splitType="Stretch">
<crosstab>
<reportElement x="0" y="0" width="352" height="30" />
<rowGroup name="SLA_PENALTY_APPLICABLE" width="200">
<bucket class="java.lang.String">
<bucketExpression><![CDATA[$F{SLA_PENALTY_APPLICABLE}]]></bucketExpression>
</bucket>
<crosstabRowHeader>
<cellContents backcolor="#F0F8FF" mode="Opaque">
<textField>
<reportElement positionType="Float" stretchType="RelativeToBandHeight" mode="Opaque" x="0" y="0" width="200" height="30" backcolor="#C9D9E7" />
<textElement textAlignment="Left" verticalAlignment="Middle">
<font fontName="Arial" size="8" isBold="true"/>
</textElement>
<textFieldExpression><![CDATA["Is SLA Penalty Applicable"]]></textFieldExpression>
</textField>
</cellContents>
</crosstabRowHeader>
<crosstabTotalRowHeader>
<cellContents/>
</crosstabTotalRowHeader>
</rowGroup>
<columnGroup name="SLA_PENALTY_APPLICABLE1" height="0">
<bucket class="java.lang.String">
<bucketExpression><![CDATA[$F{SLA_PENALTY_APPLICABLE}]]></bucketExpression>
</bucket>
<crosstabColumnHeader>
<cellContents backcolor="#F0F8FF" mode="Opaque">
<textField>
<reportElement x="0" y="0" width="0" height="0" />
<textFieldExpression><![CDATA[$V{SLA_PENALTY_APPLICABLE1}]]></textFieldExpression>
</textField>
</cellContents>
</crosstabColumnHeader>
<crosstabTotalColumnHeader>
<cellContents/>
</crosstabTotalColumnHeader>
</columnGroup>
<measure name="SLA_PENALTY_APPLICABLEMeasure" class="java.lang.String">
<measureExpression><![CDATA[$F{SLA_PENALTY_APPLICABLE}]]></measureExpression>
</measure>
<crosstabCell width="100" height="30">
<cellContents>
<textField isBlankWhenNull="true">
<reportElement x="0" y="0" width="100" height="30" />
<textElement textAlignment="Left" verticalAlignment="Middle">
<font fontName="Arial" size="8"/>
</textElement>
<textFieldExpression><![CDATA[( $V{SLA_PENALTY_APPLICABLEMeasure}=="Y" ? "YES" : "NO" )]]></textFieldExpression>
</textField>
</cellContents>
</crosstabCell>
<crosstabCell height="25" rowTotalGroup="SLA_PENALTY_APPLICABLE">
<cellContents backcolor="#BFE1FF" mode="Opaque">
<textField>
<reportElement x="0" y="0" width="50" height="25" />
<textFieldExpression><![CDATA[$V{SLA_PENALTY_APPLICABLEMeasure}]]></textFieldExpression>
</textField>
</cellContents>
</crosstabCell>
<crosstabCell width="50" columnTotalGroup="SLA_PENALTY_APPLICABLE1">
<cellContents backcolor="#BFE1FF" mode="Opaque">
<textField>
<reportElement x="0" y="0" width="50" height="25" />
<textFieldExpression><![CDATA[$V{SLA_PENALTY_APPLICABLEMeasure}]]></textFieldExpression>
</textField>
</cellContents>
</crosstabCell>
<crosstabCell rowTotalGroup="SLA_PENALTY_APPLICABLE" columnTotalGroup="SLA_PENALTY_APPLICABLE1">
<cellContents backcolor="#BFE1FF" mode="Opaque">
<textField>
<reportElement x="0" y="0" width="50" height="25" />
<textFieldExpression><![CDATA[$V{SLA_PENALTY_APPLICABLEMeasure}]]></textFieldExpression>
</textField>
</cellContents>
</crosstabCell>
</crosstab>
<componentElement>
<reportElement key="table" positionType="Float" x="0" y="60" width="180" height="60"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="Table Dataset 1" >
<datasetParameter name="ContractId">
<datasetParameterExpression><![CDATA[$P{ContractId}]]></datasetParameterExpression>
</datasetParameter>
<datasetParameter name="VersionNo">
<datasetParameterExpression><![CDATA[$P{VersionNo}]]></datasetParameterExpression>
</datasetParameter>
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column width="180" >
<jr:columnHeader height="30" rowSpan="1">
<staticText>
<reportElement positionType="Float" mode="Opaque" x="0" y="0" width="180" height="30" backcolor="#C9D9E7" />
<textElement textAlignment="Center" verticalAlignment="Middle">
<font fontName="Arial" size="8" isBold="true"/>
</textElement>
<text><![CDATA[Comments]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell height="30" rowSpan="1">
<textField isBlankWhenNull="true">
<reportElement positionType="Float" x="0" y="0" width="180" height="30" />
<textElement textAlignment="Center" verticalAlignment="Middle">
<font fontName="Arial" size="8" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{TERM_COMMENTS}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
<staticText>
<reportElement mode="Opaque" x="0" y="40" width="180" height="20" backcolor="#C9D9E7"/>
<textElement>
<font fontName="Arial" isBold="true"/>
</textElement>
<text><![CDATA[Temination charges for convenience]]></text>
</staticText>
</band>
</summary>
</jasperReport>

Answer 1

Set the property net.sf.jasperreports.export.xls.white.page.background to true in the report jrxml.
i.e.
<property name="net.sf.jasperreports.export.xls.white.page.background" value="false" />

Answer 2

The cause of strange behaviour of drawing color text
The JRXlsExporter has some limitations of using colours.
The snippet from source code of net.sf.jasperreports.engine.export.JRXlsExporter (I took source code of JR 6.3.0 version in this sample)
public void exportText(JRPrintText textElement, JRExporterGridCell gridCell, int colIndex, int rowIndex) throws JRException {
JRStyledText styledText = getStyledText(textElement);
if (styledText == null) {
return;
}
short forecolor = getWorkbookColor(textElement.getForecolor()).getIndex();
TextAlignHolder textAlignHolder = getTextAlignHolder(textElement);
short horizontalAlignment = getHorizontalAlignment(textAlignHolder);
short verticalAlignment = getVerticalAlignment(textAlignHolder);
short rotation = getRotation(textAlignHolder);
short mode = backgroundMode;
short backcolor = whiteIndex;
if (!Boolean.TRUE.equals(sheetInfo.ignoreCellBackground) && gridCell.getCellBackcolor() != null) {
mode = HSSFCellStyle.SOLID_FOREGROUND;
backcolor = getWorkbookColor(gridCell.getCellBackcolor()).getIndex();
}
The cause of using "wrong" colour is at getWorkbookColor(Color) method from the same class:
protected HSSFColor getWorkbookColor(Color awtColor) {
byte red = (byte)awtColor.getRed();
byte green = (byte)awtColor.getGreen();
byte blue = (byte)awtColor.getBlue();
HSSFColor color = null;
if (getCurrentConfiguration().isCreateCustomPalette()) {
try {
color = palette.findColor(red,green, blue) != null
? palette.findColor(red,green, blue)
: palette.addColor(red,green, blue);
} catch(Exception e) {
if(customColorIndex < MAX_COLOR_INDEX) {
palette.setColorAtIndex(customColorIndex, red, green, blue);
color = palette.getColor(customColorIndex++);
} else {
color = palette.findSimilarColor(red, green, blue);
}
}
}
return color == null ? getNearestColor(awtColor) : color;
}
The color is defined with help of getNearestColor(Color) method:
protected HSSFColor getNearestColor(Color awtColor) {
HSSFColor color = hssfColorsCache.get(awtColor);
if (color == null) {
int minDiff = Integer.MAX_VALUE;
for (Map.Entry<HSSFColor, short[]> hssfColorEntry : hssfColorsRgbs.entrySet()) {
HSSFColor crtColor = hssfColorEntry.getKey();
short[] rgb = hssfColorEntry.getValue();
int diff = Math.abs(rgb[0] - awtColor.getRed()) + Math.abs(rgb[1] - awtColor.getGreen()) + Math.abs(rgb[2] - awtColor.getBlue());
if (diff < minDiff) {
minDiff = diff;
color = crtColor;
}
}
hssfColorsCache.put(awtColor, color);
}
return color;
}
If color (backcolor) of element is not present at supported colours list at org.apache.poi.hssf.util.HSSFColor class of Apache POI library the "nearest" color will be used.
For grey color (for example, #F2F2F2) the nearest color can be white. In this case JRXlsExporter will draw text with white backcolor ignoring original backcolor of textField element.
The JRXlsxExporter does not have this problem.
How to solve problem?
As we can see the getWorkbookColor method has this check:
if (getCurrentConfiguration().isCreateCustomPalette()) {
What if we can turn on custom pallette? Yes, this will solve our problem - in this case the original color will be applied.
We can enable custom pallete with help of net.sf.jasperreports.export.xls.create.custom.palette property or with help of Java API. The SimpleXlsExporterConfiguration.setCreateCustomPalette(Boolean) method will do the same stuff as net.sf.jasperreports.export.xls.create.custom.palette property.
Working example
I took colors of standard palette in Excel from HSSFColor class and prepared jrxml demonstrated which colors are supported by JRXlsExporter out of box.
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="All supported colours by JRXlsExporter" pageWidth="960" pageHeight="595" orientation="Landscape" whenNoDataType="AllSectionsNoDetail" columnWidth="960" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" isIgnorePagination="true" >
<property name="net.sf.jasperreports.export.xls.create.custom.palette" value="true"/>
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<title>
<band height="210">
<staticText>
<reportElement positionType="Float" mode="Opaque" x="0" y="10" width="960" height="25" forecolor="#000000" backcolor="#F2F2F2" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[All supported colours by JRXlsExporter]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="50" width="160" height="20" forecolor="#FFFFFF" backcolor="#000000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[BLACK]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="70" width="160" height="20" forecolor="#FFFFFF" backcolor="#993300" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[BROWN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="90" width="160" height="20" forecolor="#FFFFFF" backcolor="#333300" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[OLIVE_GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="110" width="160" height="20" forecolor="#FFFFFF" backcolor="#003300" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[DARK_GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="130" width="160" height="20" forecolor="#FFFFFF" backcolor="#003366" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[DARK_TEAL]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="150" width="160" height="20" forecolor="#FFFFFF" backcolor="#000080" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[DARK_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="170" width="160" height="20" forecolor="#FFFFFF" backcolor="#333399" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[INDIGO]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="0" y="190" width="160" height="20" forecolor="#FFFFFF" backcolor="#333333" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GREY_80_PERCENT]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="50" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF6600" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[ORANGE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="70" width="160" height="20" forecolor="#FFFFFF" backcolor="#808000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[DARK_YELLOW]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="90" width="160" height="20" forecolor="#FFFFFF" backcolor="#008000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="110" width="160" height="20" forecolor="#FFFFFF" backcolor="#008080" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[TEAL]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="130" width="160" height="20" forecolor="#FFFFFF" backcolor="#0000FF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="150" width="160" height="20" forecolor="#FFFFFF" backcolor="#666699" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[BLUE_GREY]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="170" width="160" height="20" forecolor="#FFFFFF" backcolor="#808080" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GREY_50_PERCENT]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="160" y="190" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF0000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[RED]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="50" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF9900" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_ORANGE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="70" width="160" height="20" forecolor="#FFFFFF" backcolor="#99CC00" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIME]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="90" width="160" height="20" forecolor="#FFFFFF" backcolor="#339966" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[SEA_GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="110" width="160" height="20" forecolor="#FFFFFF" backcolor="#33CCCC" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[AQUA]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="130" width="160" height="20" forecolor="#FFFFFF" backcolor="#3366FF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="150" width="160" height="20" forecolor="#FFFFFF" backcolor="#800080" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[VIOLET]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="170" width="160" height="20" forecolor="#FFFFFF" backcolor="#969696" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GREY_40_PERCENT]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="320" y="190" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF00FF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[PINK]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="50" width="160" height="20" forecolor="#FFFFFF" backcolor="#FFCC00" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GOLD]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="70" width="160" height="20" forecolor="#000000" backcolor="#FFFF00" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[YELLOW]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="90" width="160" height="20" forecolor="#000000" backcolor="#00FF00" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[BRIGHT_GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="110" width="160" height="20" forecolor="#000000" backcolor="#00FFFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[TURQUOISE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="130" width="160" height="20" forecolor="#FFFFFF" backcolor="#800000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[DARK_RED]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="150" width="160" height="20" forecolor="#FFFFFF" backcolor="#00CCFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[SKY_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="170" width="160" height="20" forecolor="#FFFFFF" backcolor="#993366" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[PLUM]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="480" y="190" width="160" height="20" forecolor="#FFFFFF" backcolor="#C0C0C0" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[GREY_25_PERCENT]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="50" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF99CC" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[ROSE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="70" width="160" height="20" forecolor="#000000" backcolor="#FFFF99" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_YELLOW]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="90" width="160" height="20" forecolor="#000000" backcolor="#CCFFCC" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_GREEN]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="110" width="160" height="20" forecolor="#000000" backcolor="#CCFFFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_TURQUOISE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="130" width="160" height="20" forecolor="#000000" backcolor="#99CCFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[PALE_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="150" width="160" height="20" forecolor="#FFFFFF" backcolor="#CC99FF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LAVENDER]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="170" width="160" height="20" forecolor="#000000" backcolor="#FFFFFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[WHITE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="640" y="190" width="160" height="20" forecolor="#FFFFFF" backcolor="#9999FF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[CORNFLOWER_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="50" width="160" height="20" forecolor="#000000" backcolor="#FFFFCC" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LEMON_CHIFFON]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="70" width="160" height="20" forecolor="#FFFFFF" backcolor="#7F0000" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[MAROON]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="90" width="160" height="20" forecolor="#FFFFFF" backcolor="#660066" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[ORCHID]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="110" width="160" height="20" forecolor="#FFFFFF" backcolor="#FF8080" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[CORAL]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="130" width="160" height="20" forecolor="#FFFFFF" backcolor="#0066CC" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[ROYAL_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="150" width="160" height="20" forecolor="#000000" backcolor="#CCCCFF" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[LIGHT_CORNFLOWER_BLUE]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="800" y="170" width="160" height="20" forecolor="#000000" backcolor="#FFCC99" />
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[TAN]]></text>
</staticText>
</band>
</title>
</jasperReport>
At JSS (Jaspersoft Studio) the output result looks like this:
Without applying <property name="net.sf.jasperreports.export.xls.create.custom.palette" value="true"/> the generated xls file will be like this:
The textField with "All supported colours by JRXlsExporter" text has backcolor="#F2F2F2" attribute (this is grey color), but the text was generated without backcolor (color is white).
With custom pallete the generated result is:
As we can see applying custom palette has solved problem of JRXlsExporter.

Answer 3

If you have a parent report and a child report and you have set only in child, it will not work. Set the property in both parent and child report.