从Java代码运行报表时，为什么子数据集为空白? [英] Why is my subdataset blank when I run report from Java code?
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问题描述
我使用Jaspersoft Studio创建了一个表格设计.当我在Java中使用此jrxml时，未显示任何表
I created a table design using Jaspersoft Studio. When I am using this jrxml in Java no table is displayed
我将Jaspersoft Studio用作Eclipse中的插件来生成jrxml.预览表格时，该表格会显示在JSS中，但是当我使用Java代码将其导出到pdf/xls/docx时，不会加载该表格.没有任何数据的空文件.
I am using Jaspersoft Studio as a plugin in Eclipse to generate jrxml. While previewing the table gets displayed in JSS, but when I am using Java code to export it into pdf/xls/docx its not getting loaded. Empty file without any data.
这是我的JRXML文件.
This is my JRXML file.
<?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="Blank_A4_Landscape" pageWidth="802" pageHeight="555" orientation="Landscape" columnWidth="802" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="f391983e-5ad3-4a64-b310-fc7f3426e3f0">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Oracle"/>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
<conditionalStyle>
<conditionExpression><![CDATA[new Boolean($V{REPORT_COUNT}.intValue()%2==0)]]></conditionExpression>
<style backcolor="#E3F1FF"/>
</conditionalStyle>
</style>
<subDataset name="table" uuid="9fa2cf87-1e9b-4673-a13c-55f4b337d4db">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Oracle"/>
<queryString language="SQL">
<![CDATA[select * from CODE]]>
</queryString>
<field name="NAME" class="java.lang.String"/>
<field name="MOBILE" class="java.lang.String"/>
<field name="COMPANY_NAME" class="java.lang.String"/>
<field name="SITE_ID" class="java.lang.String"/>
<field name="SITE_NAME" class="java.lang.String"/>
<field name="IN_TIME" class="java.lang.String"/>
<field name="OUT_TIME" class="java.lang.String"/>
<field name="CREATE_ON" class="java.lang.String"/>
</subDataset>
<queryString language="SQL">
<![CDATA[select * from CODE]]>
</queryString>
<field name="NAME" class="java.lang.String"/>
<field name="MOBILE" class="java.lang.String"/>
<field name="COMPANY_NAME" class="java.lang.String"/>
<field name="SITE_ID" class="java.lang.String"/>
<field name="SITE_NAME" class="java.lang.String"/>
<field name="IN_TIME" class="java.lang.String"/>
<field name="OUT_TIME" class="java.lang.String"/>
<field name="CREATE_ON" class="java.lang.String"/>
<title>
<band height="50" splitType="Stretch">
<staticText>
<reportElement x="0" y="20" width="100" height="30" forecolor="#007BFF" uuid="46c45769-ac34-41af-bdb4-c45729f333b9"/>
<textElement textAlignment="Center" verticalAlignment="Middle">
<font size="14" isBold="true"/>
</textElement>
<text><![CDATA[Call Logs]]></text>
</staticText>
<textField pattern="MMM d, yyyy h:mm:ss a">
<reportElement x="450" y="20" width="330" height="30" forecolor="#007BFF" uuid="7a3c6c9d-bf5b-487d-8e13-720ecda75b61"/>
<textElement textAlignment="Right" verticalAlignment="Middle">
<font size="12" isBold="true"/>
</textElement>
<textFieldExpression><![CDATA["Report Generated on: "+new java.util.Date()]]></textFieldExpression>
</textField>
</band>
</title>
<detail>
<band height="243" splitType="Stretch">
<printWhenExpression><![CDATA[$V{REPORT_COUNT} != 0]]></printWhenExpression>
<componentElement>
<reportElement x="41" y="24" width="720" height="200" uuid="24f1ba3d-2de9-4a32-9f9f-75d592f91359">
<printWhenExpression><![CDATA[$V{REPORT_COUNT} == 1]]></printWhenExpression>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="table" uuid="f76f4c9b-3345-4d0e-8cad-dd8a75913665">
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column width="104" uuid="229daaed-80a6-42c5-9ade-2f0c75d1963e">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="104" height="30" uuid="cfa9503a-bbfe-41fb-96a6-46c633a691fc"/>
<text><![CDATA[NAME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="104" height="30" uuid="d0395260-510c-44dd-88c0-3c5ab97a6f65"/>
<textFieldExpression><![CDATA[$F{NAME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="101" uuid="94785e2c-8fa8-4402-8506-4f234bf064bd">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="101" height="30" uuid="03b5ef55-113a-485c-9d09-519dcc9d6152"/>
<text><![CDATA[MOBILE]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="101" height="30" uuid="dba6ea8d-23d1-4af3-bf64-475a5266b85f"/>
<textFieldExpression><![CDATA[$F{MOBILE}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="101" uuid="8151f7e4-e41b-430b-8730-b5499a6d5d1f">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="101" height="30" uuid="2321d1fa-4e3f-4d3f-8727-bae188bafd7b"/>
<text><![CDATA[COMPANY_NAME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="101" height="30" uuid="d9d2d45e-98cc-4f52-8b3d-4d2829d5df34"/>
<textFieldExpression><![CDATA[$F{COMPANY_NAME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="101" uuid="1c6cc322-6497-437a-8945-c1c3f08287b0">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="101" height="30" uuid="2720a693-f022-4498-93e3-4d0aa7b37982"/>
<text><![CDATA[SITE_NAME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="101" height="30" uuid="c34d16ae-244f-4b73-8e54-71655a5fc231"/>
<textFieldExpression><![CDATA[$F{SITE_NAME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="105" uuid="7b35eec3-38c2-4b76-aa58-d7cb1dc0925c">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="105" height="30" uuid="29e866cb-fecc-4854-abdb-4e131883b68e"/>
<text><![CDATA[IN_TIME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="105" height="30" uuid="d3b432d0-95e4-4d4a-b6a8-4984f3c95164"/>
<textFieldExpression><![CDATA[$F{IN_TIME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="104" uuid="ba443c16-d86f-483c-9e79-035cfc42ce40">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="104" height="30" uuid="a6d98a0b-d280-475a-8b7e-7e88778c5dcd"/>
<text><![CDATA[OUT_TIME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="104" height="30" uuid="9fa9cd8c-da08-4871-9cb1-6655d0a14e34"/>
<textFieldExpression><![CDATA[$F{OUT_TIME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="104" uuid="3aac9567-fd44-4954-8542-60806e43e960">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="104" height="30" uuid="81d7af3f-bfd5-4bda-8c4c-645d44c718b9"/>
<text><![CDATA[CREATE_ON]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="104" height="30" uuid="502689db-da95-4dba-bdd9-fc066be71100"/>
<textFieldExpression><![CDATA[$F{CREATE_ON}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
这是我的Java代码:
And this is my Java code:
public class PDFReportGenerator {
public static String ACTUAL_REPORT_PATH = "E:\\path\\Blank_A4_Landscape.jrxml";
public static String PDF_PATH = "E:\\path\\Blank_A4_Landscape.pdf";
public static void main(String[] args) throws JRException, ClassNotFoundException, SQLException{
generateReport();
}
static void generateReport() {
Connection conn = null;
ResultSet rs = null;
JasperReport jasperReport = null;
JasperPrint print = null;
String query ="SELECT * FROM CODE";
try {
if(conn==null) {
try {
conn= OracleConnection.getConnection();
} catch (Exception ex) {
ex.printStackTrace();
}
}
CallableStatement cstmt = conn.prepareCall(query);
rs=cstmt.executeQuery();
JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(rs);
jasperReport = JasperCompileManager.compileReport(ACTUAL_REPORT_PATH);
Map <String, Object> parameters = new HashMap <String, Object>();
print = JasperFillManager.fillReport(jasperReport, parameters, resultSetDataSource);
JasperExportManager.exportReportToPdfFile(print, PDF_PATH);
} catch(Exception e) {
System.out.println(e);}
}
}
推荐答案
由于您的 subDataset 执行了查询，并且您正在向其传递数据库连接.
Since your subDataset executes a query and you are passing a database connection to it.
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
在Java中，您需要将此连接传递给 fillReport ，而不是您的 JRResultSetDataSource
In java you need to pass this connection to fillReport instead of your JRResultSetDataSource
print = JasperFillManager.fillReport(jasperReport,parameters, conn);
将 JRResultSetDataSource 保留为主数据源的另一种解决方案是为子报表创建另一个数据源，并将其作为参数传递，从而相应地修改jrxml中的 datasetRun 表达式，因此使用此数据源代替报表连接.
Another solution to keep the JRResultSetDataSource as main datasource would be to create another datasource for the subreport and pass this as a parameter modifying the datasetRun expression in jrxml accordingly, hence using this datasource instead of report connection.
为澄清起见，它在IDE中有效，因为在IDE中，您需要在运行报告之前选择连接，<属性名称="com.jaspersoft.studio.data.defaultdataadapter" value ="Oracle"/> ，但是当直接从Java运行时，这些设置无效/无法加载.
To clarify, it works in IDE because in IDE you are selecting the connection before you run the report, <property name="com.jaspersoft.studio.data.defaultdataadapter" value="Oracle"/>, but these settings are not valid/loaded when running directly from java.
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