将自定义数据源添加到 Jaspersoft Studio

Add custom data source to Jaspersoft Studio

我正在尝试通过向其传递自定义数据源来填充 table。 我创建了一个带有 table 的简单报告。它自己的报告从 ms sql 数据库中获取数据。我已经写了一个java class 类似于class in this Example. But I get no value in table. At the example there is no scriptlet. I have checked the (String) this.getFieldValue("KN_FormelGG"); line of code. It gets the data from field and can show it on report. So I guess the bean data source is not filled. I call the fill Table method in a afterGroupInit. How can I use Collection of data from java in jasper? I tried also adding the java bean in dataset and query dialog, but it did not help me either. Should I add the scriptlet to subreport/table? The main emphasis of my problem having the custom data source in a scriptlet. I went the other problem through,但我仍然得不到答案。我添加了 $P{FieldDataSource}.getData() 来检查数据,但它提供了空值。

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 class 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>

数据适配器

通过用户界面创建数据适配器文件,例如 adapter.xml。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>

数据Class

根据上面的数据适配器定义,创建一个具有 createCollection 方法的 class:

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() );
    }
}

设置报表属性

确保报表具有以下内容属性(将报表链接到自定义数据适配器):

<property name="com.jaspersoft.studio.data.defaultdataadapter" value="adapter.xml"/>

设置报告字段

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 元素包含一个反映 bean 属性 的值(即,您通常调用的 Java 代码以从该 bean 的实例)。

申请

JRDataSourceFactory class 是独立的——它被数据适配器用来创建 bean 实例的集合。 static 方法 (createCollection) 在这里完成工作,实际上不能使用继承。

例子

如果可能,从 bean 的属性中借用报告的字段名称。问题中编写的代码很难辨别 KN_Id 的值来自何处。

以下示例将数据适配器链接到报表中的字段名称。

豆子Class

一个 bean 公开了一些属性:

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

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Class

数据 class 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

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>

"student" 个实例的集合被传递到报告中。在此示例中,集合包含单个实例。在您的示例中,集合可能包含许多实例。当报表库遍历集合时,firstNamelastName 的不同值将可用。

Student 实例数据最初是如何填充的机制超出了这个答案的范围。就报告工具而言,它只是使用 Student 的预填充实例。如果 FillTable 填充 TableCells,这不是报告工具的问题。