在Jaspersoft 6.3.1表中添加Datasource对象时产生Null

时间:2017-01-09 10:38:30

标签: java jasper-reports

我创建了一个带<script src="scripts/config-esnext.js"></script> 类的参数ItemData     在表格中我添加了一个数据源表达式net.sf.jasperreports.engine.data.JRBeanCollectionDataSource

我使用类$P{ItemData}创建了一个字段Data,并将其放在“表详细信息”框中。

但结果为空。我研究了如何添加datasouce对象以及示例。但我尝试应用这段代码。但是无法实现它。

我的代码:

java.lang.String

吸气\设定器

public static void main(final String[] args) {
        try {
final DataList DefinitionData= new DataList();
    final List<String> Data = new ArrayList<>();
    Data.add("AAG");
    Data.add("SNG");
    DefinitionData.setData(Data);
    final JRBeanCollectionDataSource items = new JRBeanCollectionDataSource(Data);
    final Map<String, Object> parameters = new HashMap<String, Object>();
    parameters.put("ItemData", items);

JRXML:

public class DataList {
    private List<String> Data= new ArrayList<String>();

    public List<String> getData() {
        return Data;

    }

    public void setData(final List<String> Data) {
        this.Data= Data;

    }

生成报告:

 <?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="Passing List of String" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <subDataset name="ItemDataset">
        <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
        <queryString>
            <![CDATA[]]>
        </queryString>
        <field name="Data" class="java.lang.String"/>
    </subDataset>
    <parameter name="ItemData" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
    <field name="Data" class="java.lang.String">
        <fieldDescription><![CDATA[_THIS]]></fieldDescription>
    </field>
    <summary>
        <band height="285" splitType="Stretch">
            <componentElement>
                <reportElement x="120" y="50" width="200" height="200">
                </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="ItemDataset">
                        <dataSourceExpression><![CDATA[$P{ItemData}]]></dataSourceExpression>
                    </datasetRun>
                    <jr:column width="190">
                        <jr:tableHeader height="30">
                            <staticText>
                                <reportElement x="0" y="0" width="190" height="30"/>
                                <text><![CDATA[List of Data]]></text>
                            </staticText>
                        </jr:tableHeader>
                        <jr:detailCell height="30">
                            <textField>
                                <reportElement x="0" y="0" width="190" height="30"/>
                                <textFieldExpression><![CDATA[$F{Data}]]></textFieldExpression>
                            </textField>
                        </jr:detailCell>
                    </jr:column>
                </jr:table>
            </componentElement>
        </band>
    </summary>
</jasperReport>

1 个答案:

答案 0 :(得分:0)

当你将列表(java List)传递给jasper时,所以在jasper中你也必须使用List。将Datajava.lang.String更改为java.util.List