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使用JasperReports導出爲PDF作品。但是,當我導出爲CSV,我得到一個空文件:/JasperReports導出CSV,空輸出
碧玉的.jrxml文件:
<?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="Unnamed" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="30" bottomMargin="30">
<field name="id" class="java.lang.Long"/>
<detail>
<band height="100">
<textField isStretchWithOverflow="true">
<reportElement positionType="Float" x="0" y="5" width="50" height="15"/>
<box leftPadding="10" rightPadding="10"/>
<textElement/>
<textFieldExpression><![CDATA[$F{id}]]></textFieldExpression>
</textField>
</band>
</detail>
的javacode:
JasperReport jasperReport = JasperCompileManager.compileReport(this.getClass().getClassLoader()
.getResourceAsStream("template.jrxml"));
Map<String, Object> parameters = new HashMap<String, Object>();
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, getDataSource());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
JRExporter exporter = new JRCsvExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);
return baos.toByteArray();
從您發佈的代碼看起來很好,但是您沒有將代碼寫入實際文件的代碼。你確定這個工作正常嗎? byte []數組是否返回null或空? – 2012-03-28 19:30:03