JasperReports:通过Param值更改字体大小

Question

<style name="blueStyle" >
    <conditionalStyle>
        <conditionExpression><![CDATA[($P{INDIRIZZO}).length()>30 ?  Boolean.TRUE : Boolean.FALSE]]></conditionExpression>
        <style  style="blueStyle"  fontSize="3"/>
    </conditionalStyle>
</style>
<parameter name="INDIRIZZO" class="java.lang.String"/>

[...]

<textField>
    <reportElement x="178" y="94" width="157" height="17"/>
    <textElement>
        <font fontName="Arial" size="9"/>
    </textElement>
    <textFieldExpression class="java.lang.String"><![CDATA[$P{INDIRIZZO}]]></textFieldExpression>
</textField>

当INDIRIZZO长度> 30 时,我想缩小字体大小 ...

但这不起作用....

Answer 1

您忘记将自定义样式应用于textField.

正确的片段将是:

    <textField>
        <reportElement style="blueStyle" x="178" y="94" width="157" height="17"/>
        <textElement>
            <font fontName="Arial" size="9"/>
        </textElement>
        <textFieldExpression class="java.lang.String"><![CDATA[$P{INDIRIZZO}]]></textFieldExpression>
    </textField>

我的工作样本:

<?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="conditional_styl" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <style name="style1" forecolor="#66FF66" backcolor="#009966">
        <conditionalStyle>
            <conditionExpression><![CDATA[$P{parameter1}.length() < 2]]></conditionExpression>
            <style forecolor="#FFCC00"/>
        </conditionalStyle>
    </style>
    <parameter name="parameter1" class="java.lang.String"/>
    <queryString>
        <![CDATA[SELECT DOCUMENTID FROM POSITIONS]]>
    </queryString>
    <field name="DOCUMENTID" class="java.lang.Integer"/>
    <detail>
        <band height="20" splitType="Stretch">
            <textField>
                <reportElement style="style1" x="0" y="0" width="100" height="20"/>
                <textElement/>
                <textFieldExpression><![CDATA[$F{DOCUMENTID}]]></textFieldExpression>
            </textField>
        </band>
    </detail>
</jasperReport>

另一个使用fontSize修改的工作示例:

<?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="conditional_styl" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <style name="style1" fontSize="6">
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 2 == 0]]></conditionExpression>
            <style fontSize="8"/>
        </conditionalStyle>
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 3 == 0]]></conditionExpression>
            <style fontSize="10"/>
        </conditionalStyle>
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 5 ==0]]></conditionExpression>
            <style fontSize="12"/>
        </conditionalStyle>
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 7 ==0]]></conditionExpression>
            <style fontSize="14"/>
        </conditionalStyle>
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 11 ==0]]></conditionExpression>
            <style fontSize="16"/>
        </conditionalStyle>
        <conditionalStyle>
            <conditionExpression><![CDATA[$F{DOCUMENTID} % 13 ==0]]></conditionExpression>
            <style fontSize="18"/>
        </conditionalStyle>
    </style>
    <queryString>
        <![CDATA[SELECT distinct DOCUMENTID FROM POSITIONS]]>
    </queryString>
    <field name="DOCUMENTID" class="java.lang.Integer"/>
    <detail>
        <band height="34" splitType="Stretch">
            <textField>
                <reportElement style="style1" x="0" y="0" width="100" height="34"/>
                <textElement/>
                <textFieldExpression><![CDATA[$F{DOCUMENTID}]]></textFieldExpression>
            </textField>
        </band>
    </detail>
</jasperReport>

Answer 2

您还可以使用样式文本来允许动态更改文本大小。将 textElement 标记设置为styled，然后<style>在 textFieldExpression 的内容周围添加一个标签。

<textField>
    <reportElement x="10" y="10" width="150" height="13" />
    <textElement markup="styled"/>
    <textFieldExpression>
        <![CDATA["<style size=\"" + $V{fontSize} + "\">" + $F{name} + "</style>"]]>
    </textFieldExpression>
</textField>

在这种情况下，文本大小由Integer报告中定义的变量指定，但它同样可以来自另一个字段或报告参数。

<variable name="fontSize" class="java.lang.Integer">
    <variableExpression><![CDATA[12]]></variableExpression>
</variable>

这允许你做一些聪明的事情，比如根据字段的长度改变文本大小：

<variable name="fontSize" class="java.lang.Integer">
    <variableExpression><![CDATA[$F{firstName}.length()]]></variableExpression>
</variable>

可以看到图片下方名称的字体大小是根据名称的长度来决定的：