我试图将java中的数据源放到jrxml上的数据集中以显示在jr：table上，但是当我尝试将数据放入数据集时它会崩溃，所以我猜错误来自于import或具有处理数据源的数据类型的参数。错误显示如下。有任何想法吗？ Ty all。
错误：
[JRException: Errors were encountered when compiling report expressions class file:
1. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
value = ((net.sf.jasperreports.engine.JRBeanCollectionDataSource)parameter_dados.getValue()); //$JR_EXPR_ID=8$
<---------------------------------------------------->
2. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
value = ((net.sf.jasperreports.engine.JRBeanCollectionDataSource)parameter_dados.getValue()); //$JR_EXPR_ID=8$
<---------------------------------------------------->
3. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
value = ((net.sf.jasperreports.engine.JRBeanCollectionDataSource)parameter_dados.getValue()); //$JR_EXPR_ID=8$
<----------------------------------------------------> 3 errors .]
处理Jasper报告的Java方法：
public File getRelatorioPdf(AuditoriaEntity auditoriaEntity) throws JRException, IOException {
File pdf = null;
Map<String, Object> parametros = new HashMap<>();
parametros.put("objetivo", "TESTE OBJETIVO");
parametros.put("dataInicio", "09/05/2017");
parametros.put("dataFim", "09/05/2017");
parametros.put("equipa", "Equipa TESTE");
parametros.put("coordenador", "Coordenador TESTE");
parametros.put("processo", "PROCESSO TESTE");
parametros.put("ambito", "AMBITO TESTE");
//TESTE DE LISTA
JRBeanCollectionDataSource dados = null;
List <testeLista> teste = new ArrayList<testeLista>();
teste.add(new testeLista("teste1", "1", "2"));
teste.add(new testeLista("teste2", "3", "4"));
teste.add(new testeLista("teste3", "5", "6"));
teste.add(new testeLista("teste4", "7", "8"));
teste.add(new testeLista("teste5", "9", "10"));
teste.add(new testeLista("teste6", "11", "12"));
dados = new JRBeanCollectionDataSource(teste);
final String jasperReportPath = "jasper-reports/relatorio_auditoria/relatorio_auditoria.jrxml";
InputStream inputStreamTemplate = this.environment.resourceAsStream(jasperReportPath);
JasperReport report = JasperCompileManager.compileReport(inputStreamTemplate);
JasperPrint print = JasperFillManager.fillReport(report, parametros, dados);
pdf = File.createTempFile("temp", ".pdf");
pdf.deleteOnExit();
JasperExportManager.exportReportToPdfStream(print, new FileOutputStream(pdf));
return pdf;
}
Java Class testeLista：
public class testeLista{
private String naoConformidade;
private String numNC;
private String numOBS;
public testeLista(String naoConformidade, String numNC, String numOBS) {
this.naoConformidade = naoConformidade;
this.numNC = numNC;
this.numOBS = numOBS;
}
public String getNaoConformidade() {
return naoConformidade;
}
public void setNaoConformidade(String naoConformidade) {
this.naoConformidade = naoConformidade;
}
public String getNumNC() {
return numNC;
}
public void setNumNC(String numNC) {
this.numNC = numNC;
}
public String getNumOBS() {
return numOBS;
}
public void setNumOBS(String numOBS) {
this.numOBS = numOBS;
}
}
贾斯珀报告：
<?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="Blank_A4" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="1e9d3196-bef6-4b86-97d2-b6eb6e579cec">
<import value="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"></import>
<!--<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>-->
<subDataset name="Dataset1">
<queryString>
<![CDATA[]]>
</queryString>
<field name="naoConformidade" class="java.lang.String"/>
<field name="numNC" class="java.lang.String"/>
<field name="numOBS" class="java.lang.String"/>
</subDataset>
<parameter name="dados" class="net.sf.jasperreports.engine.JRBeanCollectionDataSource"/>
<parameter name="coordenador" class="java.lang.String"/>
<parameter name="processo" class="java.lang.String"/>
<parameter name="ambito" class="java.lang.String"/>
<parameter name="objetivo" class="java.lang.String"/>
<parameter name="equipa" class="java.lang.String"/>
<parameter name="dataFim" class="java.lang.String"/>
<parameter name="dataInicio" class="java.lang.String"/>
<pageFooter>
<band height="160" splitType="Stretch">
<!--<textField>
<reportElement x="10" y="0" width="100" height="20"/>
<textFieldExpression><![CDATA[$F{naoConformidade}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="110" y="0" width="30" height="20"/>
<textFieldExpression><![CDATA[$F{numNC}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="140" y="0" width="30" height="20"/>
<textFieldExpression><![CDATA[$F{numOBS}]]></textFieldExpression>
</textField>-->
<componentElement>
<reportElement x="0" y="0" width="160" height="20">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.column_header"/>
<property name="com.jaspersoft.studio.table.style.detail"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="Dataset1">
<datasetParameter name="REPORT_DATA_SOURCE">
<datasetParameterExpression><![CDATA[$P{dados}]]></datasetParameterExpression>
</datasetParameter>
<!--<dataSourceExpression><![CDATA[$P{dados}]]></dataSourceExpression>-->
</datasetRun>
<jr:column width="100">
<jr:detailCell height="20">
<textField>
<reportElement x="0" y="0" width="100" height="20"/>
<textFieldExpression><![CDATA[$F{naoConformidade}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="30">
<jr:columnHeader height="20">
<staticText>
<reportElement x="0" y="0" width="30" height="20"/>
<text><![CDATA[NC]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell height="20">
<textField>
<reportElement x="0" y="0" width="30" height="20"/>
<textFieldExpression><![CDATA[$F{numNC}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="30">
<jr:columnHeader height="20">
<staticText>
<reportElement x="0" y="0" width="30" height="20"/>
<text><![CDATA[OBS]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell height="20">
<textField>
<reportElement x="0" y="0" width="30" height="20"/>
<textFieldExpression><![CDATA[$F{numOBS}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</pageFooter>
</jasperReport>
答案 0 :(得分：0)
错误告诉您变量“dados”在此行的构造函数中没有可接受的“java对象类型”。
dados = new JRBeanCollectionDataSource(teste);
变量引用“teste”应该是java.util.Collection OF JavaBean对象。
请注意，类“JRBeanCollectionDataSource”应仅包含引用（作为java.util.Collection）运行代码的应用程序的服务器配置的“已注册bean类”。
将Java Bean添加到列表时，它们的id引用应该与配置文件中的相同，尽管服务器线程可以访问其“Application”对象以获取所有配置的bean的集合。
然而，Jasper还进一步发展，包括一个深思熟虑的报表服务器和引擎。
您应该指定它是故意单独的Jasper报表服务器还是与JSP引擎和servlet引擎系统集成到早期服务器类型。
TOO
“testeLista”对象更明智地写为TestLista
// Declare case sensitive class name first letter is capital (java convention of class naming)
public class TesteLista{.....
// normal class name first letter capitalized
List <TesteLista> teste = new ArrayList<TesteLista>();