Galera sei que o poste é antigo.
Estou tendo o mesmo problema, em preview do ireport funciona corretamente, quando chamo da aplicação java apenas o list vem null.
O que estou fazendo errado.
CLASSE IREPORT
package report;
import dao.AcessoBancoDeDados;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRResultSetDataSource;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.view.JasperViewer;
import com.lowagie.text.pdf.codec.Base64.InputStream;
import model.VendaEntrega;
import net.sf.jasperreports.engine.JasperPrintManager;
public class Report extends AcessoBancoDeDados{
public void geraRelatorio(VendaEntrega entrega) throws JRException, Exception{
Connection conexao = conectar();
String sql = "SELECT V.ID ID_VENDA_ENTREGA, V.MOTOBOY, P.FORMA_PAGAMENTO, P.ID ID_PEDIDO, P.TOTAL, P.TROCO, P.DATA, P.HORA, "
+ "P.SITUACAO, C.NOME NOME_CLIENTE, C.BAIRRO, C.ENDERECO, C.NUMERO, C.TELEFONE, "
+ "C.ID ID_CLIENTE_E "
+ "FROM VENDA_ENTREGA V "
+ "INNER JOIN PEDIDO P ON V.ID_PEDIDO_V_E = P.ID "
+ "INNER JOIN CLIENTE C ON V.ID_CLIENTE_V_E = C.ID "
+ "WHERE V.ID = ? ";
PreparedStatement stm = conexao.prepareStatement(sql);
stm.setInt(1, entrega.getId());
ResultSet resultado = stm.executeQuery();
//implementacao da interface JRDataSource para DataSource ResultSet
JRResultSetDataSource jrRS = new JRResultSetDataSource( resultado );
//HashMap de parametros utilizados no relatorio. Sempre instanciados
Map parameters = new HashMap();
//Preenche o relatorio com os dados.
JasperFillManager.fillReportToFile( "relatorio/view/Entrega.jasper", parameters, jrRS );
//Exporta para o formato PDF
JasperExportManager.exportReportToPdfFile( "relatorio/view/report name.jrprint" );
// Visualiza o relatorio em formato PDF
JasperViewer.viewReport( "relatorio/view/report name.jrprint", false,false );
XML RELATORIO
<?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="report name" pageWidth="351" pageHeight="300" columnWidth="311" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="d5141310-8daa-487a-8cfa-b133004d4778">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<subDataset name="ITENS" uuid="07cf3489-a2a5-4290-9050-7f604b254d81">
<parameter name="ID_PEDIDO" class="java.lang.Integer">
<defaultValueExpression><![CDATA[]]></defaultValueExpression>
</parameter>
<queryString>
<![CDATA[SELECT I.ID, I.NOME_PROD, I.QUANTIDADE, I.VALOR FROM ITENS_PEDIDO I INNER JOIN PEDIDO P ON P.ID = I.ID_PEDIDO_I WHERE P.ID = $P{ID_PEDIDO};]]>
</queryString>
<field name="ID" class="java.lang.Integer"/>
<field name="NOME_PROD" class="java.lang.String"/>
<field name="QUANTIDADE" class="java.lang.Integer"/>
<field name="VALOR" class="java.lang.Double"/>
</subDataset>
<queryString>
<![CDATA[SELECT V.ID ID_VENDA_ENTREGA, V.MOTOBOY, P.FORMA_PAGAMENTO, P.ID ID_PEDIDO, P.TOTAL, P.TROCO, P.DATA, P.HORA,
P.SITUACAO, C.NOME NOME_CLIENTE, C.BAIRRO, C.ENDERECO, C.NUMERO, C.TELEFONE, C.ID ID_CLIENTE_E, I.ID, I.NOME_PROD, I.QUANTIDADE, I.VALOR
FROM VENDA_ENTREGA V
INNER JOIN PEDIDO P ON V.ID_PEDIDO_V_E = P.ID
INNER JOIN ITENS_PEDIDO I ON I.ID_PEDIDO_I = P.ID
INNER JOIN CLIENTE C ON V.ID_CLIENTE_V_E = C.ID;]]>
</queryString>
<field name="ID_VENDA_ENTREGA" class="java.lang.Integer"/>
<field name="MOTOBOY" class="java.lang.String"/>
<field name="FORMA_PAGAMENTO" class="java.lang.String"/>
<field name="ID_PEDIDO" class="java.lang.Integer"/>
<field name="TOTAL" class="java.lang.Double"/>
<field name="TROCO" class="java.lang.Double"/>
<field name="DATA" class="java.lang.String"/>
<field name="HORA" class="java.lang.String"/>
<field name="SITUACAO" class="java.lang.String"/>
<field name="NOME_CLIENTE" class="java.lang.String"/>
<field name="BAIRRO" class="java.lang.String"/>
<field name="ENDERECO" class="java.lang.String"/>
<field name="NUMERO" class="java.lang.Integer"/>
<field name="TELEFONE" class="java.lang.String"/>
<field name="ID_CLIENTE_E" class="java.lang.Integer"/>
<field name="ID" class="java.lang.Integer"/>
<field name="NOME_PROD" class="java.lang.String"/>
<field name="QUANTIDADE" class="java.lang.Integer"/>
<field name="VALOR" class="java.lang.Double"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="260" splitType="Stretch">
<staticText>
<reportElement uuid="0f5a6829-acd8-4969-8ede-a2ebe602fa00" x="114" y="13" width="76" height="20"/>
<textElement>
<font size="14" isBold="true"/>
</textElement>
<text><![CDATA[Sandubaia]]></text>
</staticText>
<staticText>
<reportElement uuid="f9d6df57-0231-4350-bbeb-cccb327d224b" x="82" y="33" width="150" height="13"/>
<textElement/>
<text><![CDATA[Rua Vera Lucia, 153 - Goânia]]></text>
</staticText>
<staticText>
<reportElement uuid="314689e2-c6de-42e2-a917-b9be93d6f958" x="70" y="46" width="179" height="13"/>
<textElement/>
<text><![CDATA[MG Belo Horizonte - CEP 31950-060]]></text>
</staticText>
<staticText>
<reportElement uuid="b2bebcff-7dd2-4d3b-b1e6-bc2aee31f268" x="0" y="0" width="29" height="13"/>
<textElement/>
<text><![CDATA[Data:]]></text>
</staticText>
<staticText>
<reportElement uuid="2cc07d1b-4db9-452c-bafc-a6539a994284" x="93" y="0" width="29" height="13"/>
<textElement/>
<text><![CDATA[Hora:]]></text>
</staticText>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="29" y="0" width="64" height="13" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{DATA}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="122" y="0" width="43" height="13" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{HORA}]]></textFieldExpression>
</textField>
<staticText>
<reportElement uuid="84f3e86f-d75f-4dae-b081-6e59b2fbd9e3" x="0" y="72" width="53" height="14"/>
<textElement/>
<text><![CDATA[Nome:]]></text>
</staticText>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="53" y="72" width="258" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{NOME_CLIENTE}]]></textFieldExpression>
</textField>
<staticText>
<reportElement uuid="8fd1f63d-d7f9-4d94-a998-b92e5c7ca102" x="0" y="86" width="53" height="14"/>
<textElement/>
<text><![CDATA[Endereço:]]></text>
</staticText>
<staticText>
<reportElement uuid="ea655f82-682f-402f-950f-9a2b8d7c0b50" x="0" y="114" width="53" height="14"/>
<textElement/>
<text><![CDATA[Total:]]></text>
</staticText>
<staticText>
<reportElement uuid="83f35279-b098-42c3-9563-f602df12f1ba" x="0" y="128" width="53" height="14"/>
<textElement/>
<text><![CDATA[Troco:]]></text>
</staticText>
<staticText>
<reportElement uuid="5b9d67cf-71ae-4677-b7f6-0d3cf4427332" x="126" y="114" width="106" height="14"/>
<textElement/>
<text><![CDATA[Forma de Pagamento:]]></text>
</staticText>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="53" y="86" width="258" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{ENDERECO}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="53" y="114" width="61" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{TOTAL}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="232" y="114" width="79" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{FORMA_PAGAMENTO}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="53" y="128" width="61" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{TROCO}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="232" y="100" width="43" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{NUMERO}]]></textFieldExpression>
</textField>
<staticText>
<reportElement uuid="dd25e004-6b3c-43ee-a88a-46d99cad6c7d" x="0" y="100" width="53" height="14"/>
<textElement/>
<text><![CDATA[Bairro:]]></text>
</staticText>
<textField>
<reportElement uuid="9891bf41-0b17-4a81-81f1-e06e47a70013" x="53" y="100" width="157" height="14" forecolor="#000000"/>
<textElement>
<font size="10" isBold="false"/>
</textElement>
<textFieldExpression><![CDATA[$F{BAIRRO}]]></textFieldExpression>
</textField>
<staticText>
<reportElement uuid="99eaa3ce-664e-45f4-a728-08f7ab0698fb" x="210" y="100" width="22" height="14"/>
<textElement/>
<text><![CDATA[N°:]]></text>
</staticText>
<staticText>
<reportElement uuid="83f35279-b098-42c3-9563-f602df12f1ba" x="0" y="142" width="82" height="14"/>
<textElement/>
<text><![CDATA[ITENS PEDIDO:]]></text>
</staticText>
<staticText>
<reportElement uuid="83f35279-b098-42c3-9563-f602df12f1ba" x="0" y="156" width="53" height="14"/>
<textElement/>
<text><![CDATA[Nome:]]></text>
</staticText>
<staticText>
<reportElement uuid="83f35279-b098-42c3-9563-f602df12f1ba" x="126" y="156" width="53" height="14"/>
<textElement/>
<text><![CDATA[Quantidade:]]></text>
</staticText>
<staticText>
<reportElement uuid="83f35279-b098-42c3-9563-f602df12f1ba" x="249" y="156" width="53" height="14"/>
<textElement/>
<text><![CDATA[Valor:]]></text>
</staticText>
<componentElement>
<reportElement uuid="71218388-7fcb-4d80-9dc0-1cf50d245f5a" x="0" y="170" width="311" height="90"/>
<jr:list 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="ITENS" uuid="397b373c-d655-46b1-bd31-2598d3aee362">
<datasetParameter name="ID_PEDIDO">
<datasetParameterExpression><![CDATA[$F{ID_PEDIDO}]]></datasetParameterExpression>
</datasetParameter>
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:listContents height="90" width="311">
<textField>
<reportElement uuid="e2c7739d-7f98-4228-ae4a-95c26839485d" x="0" y="0" width="100" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{NOME_PROD}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="00fba14e-3faa-4cc0-83ba-dd8af95879ca" x="100" y="0" width="100" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{QUANTIDADE}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="21188441-b4c0-4604-b96b-2731060d12f5" x="202" y="0" width="100" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{VALOR}]]></textFieldExpression>
</textField>
</jr:listContents>
</jr:list>
</componentElement>
</band>
</title>
</jasperReport>