在JasperReports中使用hibernate的查询的步骤

JasperReports 从1.2.0以后的版本开始 支持一些其它的查询的实现，如HQL和XPath，在此文中将介绍HQL在JasperReports中的应用。
1.要在报表中使用HQL，当然得将hibernate的一些包将入到你的类路径中，并且有相应的hbm.xml映射文件。
2.在设计报表时，可以直接将你的HQL写在报表模板文件中，注意有以下不同（红色字）

<?xml version="1.0"?> <!DOCTYPE jasperReport PUBLIC "-//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd" [ <!ENTITY reportStyles SYSTEM "./ReportStyles.ent"> ]> <jasperReport name="AddressesReport" pageWidth="595" pageHeight="842" columnWidth="515" columnSpacing="0" leftMargin="40" rightMargin="40" topMargin="50" bottomMargin="50" whenNoDataType="AllSectionsNoDetail" isTitleNewPage="false" isSummaryNewPage="false"> <import value="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/> <style name="Arial_Normal" isDefault="true" fontName="Arial" fontSize="12" pdfFontName="Helvetica" pdfEncoding="Cp1252" isPdfEmbedded="false"/> <style name="Arial_Normal_Small" fontName="Arial" fontSize="9" pdfFontName="Helvetica" pdfEncoding="Cp1252" isPdfEmbedded="false"/> <style name="Arial_Bold" isDefault="false" fontName="Arial" fontSize="12" isBold="true" pdfFontName="Helvetica-Bold" pdfEncoding="Cp1252" isPdfEmbedded="false"/> <style name="Arial_Italic" isDefault="false" fontName="Arial" fontSize="12" isItalic="true" pdfFontName="Helvetica-Oblique" pdfEncoding="Cp1252" isPdfEmbedded="false"/> <parameter name="ReportTitle" class="java.lang.String"/> <parameter name="CityFilter" class="java.util.List"/> <queryString language="hql"> <![CDATA[ select address as address, document.id as documentId, document.total as documentTotal from Address as address join address.documents as document where city not in ($P{CityFilter}) order by address.city, address.lastName, address.firstName, address.id]]> </queryString> <field name="id" class="java.lang.Long"> <fieldDescription>address.id</fieldDescription> </field> <field name="firstName" class="java.lang.String"> <fieldDescription>address.firstName</fieldDescription> </field> <field name="lastName" class="java.lang.String"> <fieldDescription>address.lastName</fieldDescription> </field> <field name="street" class="java.lang.String"> <fieldDescription>address.street</fieldDescription> </field> <field name="city" class="java.lang.String"> <fieldDescription>address.city</fieldDescription> </field> <field name="documentId" class="java.lang.Long"/> <field name="documentTotal" class="java.lang.Double"/> <variable name="addressTotal" class="java.lang.Double" resetType="Group" resetGroup="AddressGroup" calculation="Sum"> <variableExpression>$F{documentTotal}</variableExpression> </variable> <group name="AddressGroup"> <groupExpression> $F{id} </groupExpression> <groupHeader> <band height="25"> <frame> <reportElement x="0" y="0" width="375" height="21" mode="Opaque" backcolor="#E0E0E0"/> <textField isStretchWithOverflow="true"> <reportElement x="5" y="3" width="160" height="15"/> <textFieldExpression class="java.lang.String"> $F{firstName} + " " + $F{lastName} + " (ID: " + $F{id} + ")" </textFieldExpression> </textField> <textField isStretchWithOverflow="true"> <reportElement x="210" y="3" width="160" height="15"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.String"> $F{street} + "," + $F{city} </textFieldExpression> </textField> </frame> </band> </groupHeader> <groupFooter> <band height="25"> <line> <reportElement x="20" y="0" width="475" height="1" forecolor="#808080"/> <graphicElement pen="Thin"/> </line> <staticText> <reportElement x="20" y="2" width="70" height="15" style="Arial_Normal_Small"/> <text>Total</text> </staticText> <textField> <reportElement x="100" y="2" width="50" height="15" style="Arial_Normal_Small"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.Integer"> $V{AddressGroup_COUNT} </textFieldExpression> </textField> <textField isStretchWithOverflow="true" pattern="#.00"> <reportElement x="255" y="2" width="100" height="15" style="Arial_Normal_Small"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.Double"> $V{addressTotal} </textFieldExpression> </textField> </band> </groupFooter> </group> <title> <band height="50"> <line> <reportElement x="0" y="0" width="515" height="0" forecolor="black"/> </line> <textField isBlankWhenNull="true"> <reportElement x="0" y="10" width="515" height="30" style="Arial_Normal"/> <textElement textAlignment="Center" lineSpacing="Single"> <font size="22"/> </textElement> <textFieldExpression class="java.lang.String">$P{ReportTitle}</textFieldExpression> </textField> </band> </title> <detail> <band height="13"> <staticText> <reportElement x="20" y="0" width="70" height="12" style="Arial_Normal_Small" isPrintRepeatedValues="false" isPrintInFirstWholeBand="true" printWhenGroupChanges="AddressGroup"/> <text>Document ID</text> </staticText> <textField> <reportElement x="100" y="0" width="50" height="12" style="Arial_Normal_Small"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.Long"> $F{documentId} </textFieldExpression> </textField> <staticText> <reportElement x="180" y="0" width="70" height="12" style="Arial_Normal_Small" isPrintRepeatedValues="false" isPrintInFirstWholeBand="true" printWhenGroupChanges="AddressGroup"/> <text>Document Total</text> </staticText> <textField isStretchWithOverflow="true" pattern="#.00"> <reportElement x="255" y="0" width="100" height="12" style="Arial_Normal_Small"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.Double"> $F{documentTotal} </textFieldExpression> </textField> </band> </detail> <pageFooter> <band height="40"> <printWhenExpression>$P{IS_IGNORE_PAGINATION}.booleanValue()?Boolean.FALSE:Boolean.TRUE</printWhenExpression> <line> <reportElement x="0" y="10" width="515" height="0"/> </line> <textField> <reportElement x="200" y="20" width="80" height="15"/> <textElement textAlignment="Right"/> <textFieldExpression class="java.lang.String"> "Page " + String.valueOf($V{PAGE_NUMBER}) + " of" </textFieldExpression> </textField> <textField evaluationTime="Report"> <reportElement x="280" y="20" width="75" height="15"/> <textElement textAlignment="Left"/> <textFieldExpression class="java.lang.String"> " " + String.valueOf($V{PAGE_NUMBER}) </textFieldExpression> </textField> </band> </pageFooter> </jasperReport>

填充报表
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session session = sessionFactory.openSession()
Transaction transaction = session.beginTransaction();
//报表参数
Map parameters = new HashMap();
parameters.put(JRHibernateQueryExecuterFactory.PARAMETER_HIBERNATE_SESSION, session);
parameters.put("ReportTitle", "Address Report");
List cityFilter = new ArrayList(3);
cityFilter.add("Boston");
cityFilter.add("Chicago");
cityFilter.add("Oslo");
parameters.put("CityFilter", cityFilter);
parameters.put("OrderClause", "city");

for(int i = 0; i < reportNames.length; i++)
{
long start = System.currentTimeMillis();
JasperFillManager.fillReportToFile(reportNames[i] + ".jasper", params);
System.err.println("Report : " + reportNames[i] + ". Filling time : " + (System.currentTimeMillis() - start));
}

transaction.rollback();
session.close();

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