我在gwt框架中使用了datebox。datebox的值作爲字段t3中的字符串存儲在數據庫中。 當我打印碧玉報告時,t3'11/02/2014'的值爲'11022014'。而且,我使用這種格式,但有一些錯誤。從字符串更改日期格式
<?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="RosterReport" pageWidth="700" pageHeight="595" orientation="Landscape" columnWidth="660" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<field name="t1" class="java.lang.String"/>
<field name="t2" class="java.lang.String"/>
<field name="t3" class="java.lang.String"/>
<field name="t4" class="java.lang.String"/>
<field name="t5" class="java.lang.String"/>
<variable name="date1" class="java.util.Date">
<variableExpression><![CDATA[new SimpleDateFormat("MM/dd/yyyy").format($F{t3})]]></variableExpression>
</variable>
<variable name="date2" class="java.lang.String">
<variableExpression><![CDATA[new SimpleDateFormat("MM/dd/yyyy").format($F{t4})]]></variableExpression>
</variable>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="58" splitType="Stretch">
<staticText>
<reportElement x="247" y="17" width="153" height="39"/>
<textElement textAlignment="Center" verticalAlignment="Middle">
<font size="12" isBold="true"/>
</textElement>
<text><![CDATA[Report for Roster]]></text>
</staticText>
<staticText>
<reportElement x="530" y="0" width="43" height="20"/>
<textElement/>
<text><![CDATA[Printed;]]></text>
</staticText>
<textField>
<reportElement x="573" y="0" width="87" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[new java.util.Date()]]></textFieldExpression>
</textField>
</band>
</title>
<pageHeader>
<band height="6" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="22" splitType="Stretch">
<staticText>
<reportElement x="115" y="0" width="81" height="20"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Code]]></text>
</staticText>
<staticText>
<reportElement x="196" y="0" width="100" height="20"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Description]]></text>
</staticText>
<staticText>
<reportElement x="296" y="0" width="73" height="20"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Start Date]]></text>
</staticText>
<staticText>
<reportElement x="369" y="0" width="78" height="20"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[End Date]]></text>
</staticText>
<staticText>
<reportElement x="447" y="0" width="100" height="20"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Remark]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="34" splitType="Stretch">
<textField>
<reportElement x="196" y="0" width="100" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{t2}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="447" y="0" width="100" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{t5}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="115" y="0" width="81" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{t1}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="300" y="0" width="69" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$V{date1}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="369" y="0" width="78" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$V{date2}]]></textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band height="14" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="9" splitType="Stretch"/>
</pageFooter>
</jasperReport>
的錯誤是
Source text : new SimpleDateFormat("MM/dd/yyyy").format($F{t3})
Caused by: java.lang.IllegalArgumentException: Cannot format given Object as a Date
如何解決這個問題?
使用調試器,並找出傳遞給'SimpleDateFormat#format()'' – 2014-02-11 11:51:44