Java 编译和填写 Jasper 报告 - XML 数据源
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Compile & Fill Jasper Report - XML datasource
提问by travega
I am hoping someone can tell me why the code below is creating an empty pdf file every time?
我希望有人能告诉我为什么下面的代码每次都创建一个空的 pdf 文件？
I am trying to compile, fill and run the xmldatasourcesample project that ships with JasperReports 4.0.2. Although I am attempting to do it Programatically as I want to use a similar (non ant-based) compilation method in my own software. The same project that comes with Jasper uses ant scripts to create the report and it works. So I know there is no issue with the JRXML files. However, I cannot seem to fill the report with data correctly.
我正在尝试编译、填充和运行xmldatasourceJasperReports 4.0.2 附带的示例项目。尽管我试图以编程方式执行此操作，因为我想在自己的软件中使用类似的（非基于 ant 的）编译方法。Jasper 附带的同一个项目使用 ant 脚本来创建报告并且它可以工作。所以我知道 JRXML 文件没有问题。但是，我似乎无法正确地用数据填充报告。
When I debugged the Jasper engine source to see if my XML source document is being loaded correctly I see that the PARAMETER_XML_DOCUMENThad the value
当我调试 Jasper 引擎源以查看我的 XML 源文档是否被正确加载时，我看到PARAMETER_XML_DOCUMENT具有值
[#document: null]
[#document: null]
Do you think this would mean that the XML source file is not being read correctly?
您认为这是否意味着未正确读取 XML 源文件？
The code compiles and runs without errors and all of the relevant files are generated (.jasper, .jrprint and .pdf) but for some reason the rendered PDF document appears to have only one blank page every time.
代码编译并运行时没有错误，所有相关文件都生成（.jasper、.jrprint 和 .pdf），但由于某种原因，呈现的 PDF 文档每次似乎只有一个空白页。
Any help is greatly appreciated...
任何帮助是极大的赞赏...
public static void main(String[] args) {
Map map = new RenderReportBean().execute("northwind", "OrdersReport");
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public Map execute(String sourceFileId, String templateId, Integer[] formats) {
Map params = new HashMap();
Document document;
Map<Integer, Boolean> renderedSuccessList = new HashMap<Integer, Boolean>();
try {
document = JRXmlUtils.parse(JRLoader.getLocationInputStream(sourceFileId + ".xml"));
params.put(JRXPathQueryExecuterFactory.PARAMETER_XML_DATA_DOCUMENT, document);
params.put(JRXPathQueryExecuterFactory.XML_DATE_PATTERN, "yyyy-MM-dd");
params.put(JRXPathQueryExecuterFactory.XML_NUMBER_PATTERN, "#,##0.##");
params.put(JRXPathQueryExecuterFactory.XML_LOCALE, Locale.ENGLISH);
params.put(JRParameter.REPORT_LOCALE, Locale.US);
JasperCompileManager.compileReportToFile(templateId + ".jrxml", templateId + ".jasper");
JasperFillManager.fillReportToFile(templateId + ".jasper", params);
JasperExportManager.exportReportToPdfFile(templateId + ".jrprint", sourceFileId + ".pdf");
} catch (Exception e) {
e.printStackTrace();
return renderedSuccessList;
}
return renderedSuccessList;
}
OrdersReport.jrxml
订单报表.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="OrdersReport" pageWidth="500" pageHeight="842" columnWidth="500" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0">
<style name="Sans_Normal" isDefault="true" fontName="DejaVu Sans" fontSize="8" isBold="false" isItalic="false" isUnderline="false" isStrikeThrough="false"/>
<style name="Sans_Bold" isDefault="false" fontName="DejaVu Sans" fontSize="8" isBold="true" isItalic="false" isUnderline="false" isStrikeThrough="false"/>
<style name="Sans_Italic" isDefault="false" fontName="DejaVu Sans" fontSize="8" isBold="false" isItalic="true" isUnderline="false" isStrikeThrough="false"/>
<parameter name="CustomerID" class="java.lang.String"/>
<queryString language="xPath"><![CDATA[/Northwind/Orders[CustomerID='$P{CustomerID}']]]></queryString>
<field name="Id" class="java.lang.String">
<fieldDescription><![CDATA[OrderID]]></fieldDescription>
</field>
<field name="OrderDate" class="java.util.Date">
<fieldDescription><![CDATA[OrderDate]]></fieldDescription>
</field>
<field name="ShipCity" class="java.lang.String">
<fieldDescription><![CDATA[ShipCity]]></fieldDescription>
</field>
<field name="Freight" class="java.lang.Float">
<fieldDescription><![CDATA[Freight]]></fieldDescription>
</field>
<variable name="TotalFreight" class="java.lang.Float" calculation="Sum">
<variableExpression><![CDATA[$F{Freight}]]></variableExpression>
</variable>
<pageHeader>
<band height="14">
<frame>
<reportElement x="0" y="2" width="356" height="10" forecolor="#ccffff" backcolor="#ccffff" mode="Opaque"/>
<staticText>
<reportElement mode="Opaque" x="0" y="0" width="48" height="10" backcolor="#ccffff" style="Sans_Bold"/>
<textElement textAlignment="Right"/>
<text><![CDATA[ID]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="54" y="0" width="87" height="10" backcolor="#ccffff" style="Sans_Bold"/>
<textElement textAlignment="Center"/>
<text><![CDATA[Order Date]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="146" y="0" width="108" height="10" backcolor="#ccffff" style="Sans_Bold"/>
<text><![CDATA[Ship City]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="259" y="0" width="92" height="10" backcolor="#ccffff" style="Sans_Bold"/>
<textElement textAlignment="Right"/>
<text><![CDATA[Freight]]></text>
</staticText>
</frame>
</band>
</pageHeader>
<detail>
<band height="14">
<textField>
<reportElement x="0" y="2" width="51" height="10"/>
<textElement textAlignment="Right"/>
<textFieldExpression class="java.lang.String"><![CDATA[$F{Id}]]></textFieldExpression>
</textField>
<textField isStretchWithOverflow="true" pattern="yyyy, MMM dd">
<reportElement positionType="Float" x="54" y="2" width="87" height="10"/>
<textElement textAlignment="Center"/>
<textFieldExpression class="java.util.Date"><![CDATA[$F{OrderDate}]]></textFieldExpression>
</textField>
<textField isStretchWithOverflow="true">
<reportElement positionType="Float" x="146" y="2" width="108" height="10"/>
<textElement/>
<textFieldExpression class="java.lang.String"><![CDATA[$F{ShipCity}]]></textFieldExpression>
</textField>
<textField isStretchWithOverflow="true" pattern="¤ #,##0.00">
<reportElement positionType="Float" x="259" y="2" width="92" height="10"/>
<textElement textAlignment="Right"/>
<textFieldExpression class="java.lang.Float"><![CDATA[$F{Freight}]]></textFieldExpression>
</textField>
</band>
</detail>
<summary>
<band height="14">
<frame>
<reportElement x="0" y="2" width="356" height="10" forecolor="#33cccc" backcolor="#33cccc" mode="Opaque"/>
<staticText>
<reportElement mode="Opaque" x="160" y="0" width="67" height="10" backcolor="#33cccc" style="Sans_Bold"/>
<textElement textAlignment="Right"/>
<text><![CDATA[Total :]]></text>
</staticText>
<textField>
<reportElement mode="Opaque" x="259" y="0" width="92" height="10" backcolor="#33cccc" style="Sans_Bold"/>
<textElement textAlignment="Right"/>
<textFieldExpression class="java.lang.Float"><![CDATA[$V{TotalFreight}]]></textFieldExpression>
</textField>
<textField>
<reportElement mode="Opaque" x="227" y="0" width="27" height="10" backcolor="#33cccc" style="Sans_Bold"/>
<textElement textAlignment="Right"/>
<textFieldExpression class="java.lang.Integer"><![CDATA[$V{REPORT_COUNT}]]></textFieldExpression>
</textField>
</frame>
</band>
</summary>
</jasperReport>
CustomersReport.jrxml
客户报告.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="CustomersReport" pageWidth="595" pageHeight="842" columnWidth="515" leftMargin="40" rightMargin="40" topMargin="50" bottomMargin="50">
<style name="Sans_Normal" isDefault="true" fontName="DejaVu Sans" fontSize="12" isBold="false" isItalic="false" isUnderline="false" isStrikeThrough="false"/>
<style name="Sans_Bold" isDefault="false" fontName="DejaVu Sans" fontSize="12" isBold="true" isItalic="false" isUnderline="false" isStrikeThrough="false"/>
<style name="Sans_Italic" isDefault="false" fontName="DejaVu Sans" fontSize="12" isBold="false" isItalic="true" isUnderline="false" isStrikeThrough="false"/>
<queryString language="xPath"><![CDATA[/Northwind/Customers]]></queryString>
<field name="CustomerID" class="java.lang.String">
<fieldDescription><![CDATA[CustomerID]]></fieldDescription>
</field>
<field name="CompanyName" class="java.lang.String">
<fieldDescription><![CDATA[CompanyName]]></fieldDescription>
</field>
<title>
<band height="50">
<line>
<reportElement x="0" y="0" width="515" height="1"/>
<graphicElement/>
</line>
<staticText>
<reportElement x="0" y="10" width="515" height="30" style="Sans_Normal"/>
<textElement textAlignment="Center">
<font size="22"/>
</textElement>
<text><![CDATA[Customer Orders Report]]></text>
</staticText>
</band>
</title>
<pageHeader>
<band height="21">
<staticText>
<reportElement mode="Opaque" x="0" y="5" width="515" height="15" forecolor="#ffffff" backcolor="#333333" style="Sans_Bold"/>
<text><![CDATA[Customer Order List]]></text>
</staticText>
</band>
</pageHeader>
<detail>
<band height="50">
<textField>
<reportElement x="5" y="5" width="100" height="15" isPrintWhenDetailOverflows="true" style="Sans_Bold"/>
<textFieldExpression class="java.lang.String"><![CDATA[$F{CustomerID}]]></textFieldExpression>
</textField>
<staticText>
<reportElement isPrintRepeatedValues="false" x="404" y="5" width="100" height="15" isPrintWhenDetailOverflows="true" style="Sans_Bold"/>
<text><![CDATA[(continued)]]></text>
</staticText>
<line>
<reportElement x="0" y="20" width="515" height="1" isPrintWhenDetailOverflows="true"/>
<graphicElement/>
</line>
<subreport>
<reportElement isPrintRepeatedValues="false" x="5" y="25" width="507" height="20" isRemoveLineWhenBlank="true" backcolor="#ffcc99"/>
<subreportParameter name="XML_DATA_DOCUMENT">
<subreportParameterExpression>$P{XML_DATA_DOCUMENT}</subreportParameterExpression>
</subreportParameter>
<subreportParameter name="XML_DATE_PATTERN">
<subreportParameterExpression>$P{XML_DATE_PATTERN}</subreportParameterExpression>
</subreportParameter>
<subreportParameter name="XML_NUMBER_PATTERN">
<subreportParameterExpression>$P{XML_NUMBER_PATTERN}</subreportParameterExpression>
</subreportParameter>
<subreportParameter name="XML_LOCALE">
<subreportParameterExpression>$P{XML_LOCALE}</subreportParameterExpression>
</subreportParameter>
<subreportParameter name="XML_TIME_ZONE">
<subreportParameterExpression>$P{XML_TIME_ZONE}</subreportParameterExpression>
</subreportParameter>
<subreportParameter name="CustomerID">
<subreportParameterExpression>$F{CustomerID}</subreportParameterExpression>
</subreportParameter>
<subreportExpression class="java.lang.String"><![CDATA["OrdersReport.jasper"]]></subreportExpression>
</subreport>
<textField>
<reportElement x="109" y="5" width="291" height="15" isPrintWhenDetailOverflows="true" style="Sans_Bold"/>
<textFieldExpression class="java.lang.String"><![CDATA[$F{CompanyName}]]></textFieldExpression>
</textField>
</band>
</detail>
<pageFooter>
<band height="40">
<line>
<reportElement x="0" y="10" width="515" height="1"/>
<graphicElement/>
</line>
<textField>
<reportElement x="200" y="20" width="80" height="15"/>
<textElement textAlignment="Right"/>
<textFieldExpression class="java.lang.String"><![CDATA["Page " + String.valueOf($V{PAGE_NUMBER}) + " of"]]></textFieldExpression>
</textField>
<textField evaluationTime="Report">
<reportElement x="280" y="20" width="75" height="15"/>
<textElement/>
<textFieldExpression class="java.lang.String"><![CDATA[" " + String.valueOf($V{PAGE_NUMBER})]]></textFieldExpression>
</textField>
</band>
</pageFooter>
</jasperReport>
采纳答案by travega
Ok so I found out the issue and it's a bit of an odd one really as the other means of compiling the templates do not call for the same approach.
好的，所以我发现了这个问题，它确实有点奇怪，因为编译模板的其他方法不需要相同的方法。
The example above uses nested reports and for some reason the runtime compile option requires you to compile both templates individually instead of just compiling the Super report and Jasper picking up the sub-report bu default - as seems to be the case when compiling from ant scripts.
上面的示例使用嵌套报告，出于某种原因，运行时编译选项要求您单独编译两个模板，而不仅仅是编译超级报告，而 Jasper 会选择默认的子报告 - 从 ant 脚本编译时似乎就是这种情况.
So to make the above code work the line:
因此，要使上面的代码工作，请执行以下操作：
JasperCompileManager.compileReportToFile(templateId + ".jrxml", templateId + ".jasper");
needs to be included for each template (super and sub) that are required for the report.
需要包含报告所需的每个模板（超级和子）。
回答by Dhanagopal Sivaraman
The problem is here: document = JRXmlUtils.parse(JRLoader.getLocationInputStream(sourceFileId + ".xml"));
问题在这里： document = JRXmlUtils.parse(JRLoader.getLocationInputStream(sourceFileId + ".xml"));
The API says: getLocationInputStream
API 说：getLocationInputStream
public static java.io.InputStream getLocationInputStream(java.lang.String location) throws JRException
公共静态 java.io.InputStream getLocationInputStream(java.lang.String location) 抛出 JRException
Tries to open an input stream for a location.
The method tries to interpret the location as a file name, a resource name or an URL. If any of these succeed, an input stream is created and returned.
Parameters:
location - the location
Returns:
an input stream if the location is an existing file name, a resource name on the classpath or an URL or null otherwise.
Throws:
JRException
If the method is not able to return an input stream, it will return null. Basically the string you are passing as parameter is incorrect. Try passing the absolute path.
如果该方法无法返回输入流，它将返回 null。基本上你作为参数传递的字符串是不正确的。尝试传递绝对路径。
