Ima*_*man 10 java jasper-reports javabeans jaspersoft-studio
我试图通过传递自定义数据源来填充表.我创建了一个包含表格的简单报告.报告它自己从ms sql数据库获取数据.我编写了一个类似于本例中的类的java类.但我在桌上没有任何价值.在该示例中没有scriptlet.我检查了(String) this.getFieldValue("KN_FormelGG"); 代码行.它从字段中获取数据并可以在报告中显示.所以我猜bean数据源没有填充.我在a中调用了填充表方法afterGroupInit.如何在jasper中使用java中的数据集合？我也尝试在数据集和查询对话框中添加java bean ,但它也没有帮助我.我应该将scriptlet添加到子报表/表吗？我的问题的主要重点是在scriptlet中具有自定义数据源.我解决了另一个问题,但我仍然没有得到答案.我添加$P{FieldDataSource}.getData()了检查数据,但它提供了null.
java class 1:
package testProjektIman.scriptlets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.jasperreports.engine.JRDefaultScriptlet;
import net.sf.jasperreports.engine.JRScriptletException;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
public class FillTable extends JRDefaultScriptlet {
@Override
public void afterGroupInit(final String id)
throws JRScriptletException {
fillTable();
}
public ArrayList<String> splitGGArray(final String kNFormelGG) {
ArrayList<String> fieldNames = new ArrayList<>();
String[] array = (kNFormelGG.split(" "));
for (String sub : array) {
fieldNames.add(sub);
}
return fieldNames;
}
public Map<String, Object> fillTable()
throws JRScriptletException {
String kNFormelGG = null;
kNFormelGG = (String) this.getFieldValue("KN_FormelGG");
List<TableCells> listTableCells = new ArrayList<>();
TableCells tableCell;
for (String fn : splitGGArray(kNFormelGG)) {
tableCell = new TableCells();
tableCell.setFieldName(fn);
listTableCells.add(tableCell);
}
JRBeanCollectionDataSource tableCellJRBean = new JRBeanCollectionDataSource(listTableCells);
Map<String, Object> parameters = new HashMap<>();
parameters.put("FieldDataSource", tableCellJRBean);
return parameters;
}
}
Java类2
package testProjektIman.scriptlets;
public class TableCells {
private String fieldName;
private String keyFormel;
private String mK;
private String notation;
private String Item;
//getters setters
}
JRXML
<?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="tableAutoFill" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="37fc3a9c-38e9-41be-9039-56249c5283d7">
<subDataset name="TableDataSource" uuid="5999e646-aeec-4b2b-b29b-68e897d56999">
<queryString>
<![CDATA[]]>
</queryString>
<field name="fieldName" class="java.lang.String"/>
</subDataset>
<scriptlet name="Filltable" class="testProjektIman.scriptlets.FillTable"/>
<parameter name="FieldDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource" isForPrompting="false"/>
<queryString>
<![CDATA[select * from "KennzahlReferenz2015_QIBericht", "Images"
where LB_ID = 62
and KN_OffiziellGruppe = 3
and IMG_ID = 1]]>
</queryString>
<field name="KN_Id" class="java.lang.Integer"/>
<field name="KN_FormelZ" class="java.lang.String"/>
<field name="KN_FormelGG" class="java.lang.String"/>
<group name="id">
<groupExpression><![CDATA[$F{KN_Id}]]></groupExpression>
<groupHeader>
<band height="50"/>
</groupHeader>
<groupFooter>
<band height="50"/>
</groupFooter>
</group>
<detail>
<band height="191" splitType="Stretch">
<componentElement>
<reportElement x="50" y="18" width="260" height="120" uuid="942ab836-df83-4a2f-8215-845073ad163f">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
</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" whenNoDataType="AllSectionsNoDetail">
<datasetRun subDataset="TableDataSource" uuid="b554ada5-c388-4534-af8e-93571a417adb">
<parametersMapExpression><![CDATA[$P{FieldDataSource}]]></parametersMapExpression>
<dataSourceExpression><![CDATA[$P{FieldDataSource}]]></dataSourceExpression>
</datasetRun>
<jr:column width="100" uuid="f57e4e8e-8a2e-405f-b9ab-7a704e0986fd">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="9a55dd73-71e3-4559-9a8b-17d98bf17753"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[FieldName]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="c3e6ccfc-9f91-4d7a-800a-613f5dded928"/>
<textFieldExpression><![CDATA[$F{fieldName}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
例如adapter.xml,通过用户界面创建数据适配器文件.内容可能类似于:
<?xml version="1.0" encoding="UTF-8" ?>
<beanDataAdapter class="net.sf.jasperreports.data.bean.BeanDataAdapterImpl">
<name>YourClass</name>
<factoryClass>com.yourcompany.jasper.JRDataSourceFactory</factoryClass>
<methodName>createCollection</methodName>
<useFieldDescription>false</useFieldDescription>
</beanDataAdapter>
createCollection根据上面的数据适配器定义,创建一个具有方法的类:
package com.compay.jasper;
public class JRDataSourceFactory {
/**
* @return A collection of data for the report.
*/
public static Collection<YourClass> createCollection() {
return Arrays.asList( new YourClass() );
}
}
确保报告具有以下属性(将报告链接到自定义数据适配器):
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="adapter.xml"/>
报告字段现在应该能够引用bean属性:
<field name="yourObject.property" class="java.lang.String">
<fieldDescription><![CDATA[yourObject.property]]></fieldDescription>
</field>
重要的是fieldDescription元素包含反映bean属性的值(即,通常调用的Java代码,用于从该bean的实例上的bean中检索值).
该JRDataSourceFactory班是独一无二的-它使用的数据适配器创建bean实例的集合.该static方法(createCollection)在这里做的工作,不,确实不能,使用继承.
如果可能,从bean的属性借用报告的字段名称.问题中写的代码使得难以辨别出价值KN_Id来自何处.
以下示例将数据适配器链接到报表中的字段名称.
bean暴露了一些属性:
package com.company.domain;
public final class Student extends Entity {
private String firstName;
private String lastName;
public String getFirstName() {
return this.firstName;
}
public String getLastName() {
return this.lastName;
}
}
数据适配器看起来像:
<?xml version="1.0" encoding="UTF-8" ?>
<beanDataAdapter class="net.sf.jasperreports.data.bean.BeanDataAdapterImpl">
<name>Student</name>
<factoryClass>com.company.jasper.JRDataSourceFactory</factoryClass>
<methodName>createCollection</methodName>
<useFieldDescription>false</useFieldDescription>
</beanDataAdapter>
数据类创建bean的实例:
package com.compay.jasper;
import com.company.domain.Student;
public class JRDataSourceFactory {
public static Collection<Student> createCollection() {
return Arrays.asList( new Student() );
}
}
报告字段反映了bean字段:
<field name="firstName" class="java.lang.String">
<fieldDescription><![CDATA[firstName]]></fieldDescription>
</field>
<field name="lastName" class="java.lang.String">
<fieldDescription><![CDATA[lastName]]></fieldDescription>
</field>
"学生"实例的集合将传递到报告中.在此示例中,集合包含单个实例.在您的示例中,集合可以包含许多实例.当报表库迭代集合时,将提供不同的值firstName和值lastName.
Student最初如何填充实例数据的机制超出了本答案的范围.就报告工具而言,它只是使用预先填充的实例Student.如果FillTable填充TableCells,那不是报告工具的问题.
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