我的示例json文件内容
{
"FlightLog":{
"FlightLog.crewMembers":[
],
"destinationStationCode":"JPN",
"FlightLog.destinationStationCode":"IND",
"FlightLog.originStationCode":"IND",
"FlightLog._lockVersion":"0",
"FlightLog.flightNum":"123"
}
}
我想获得FlightLog.FlightLog.originStationCode的价值。
例如: 当我声明如下字段名称时,我得到值" JPN"
<field name="FlightLog.destinationStationCode" class="java.lang.String">
<fieldDescription><![CDATA[FlightLog.destinationStationCode]]></fieldDescription>
</field>
如果我声明如下字段,
<field name="destinationStationCode" class="java.lang.String">
<fieldDescription><![CDATA[FlightLog.FlightLog.destinationStationCode]]></fieldDescription>
</field>
我对上述代码没有任何价值。
我尝试使用
<field name="destinationStationCode" class="java.lang.String">
<fieldDescription><![CDATA[FlightLog[FlightLog.destinationStationCode]]]></fieldDescription>
</field>
<field name="destinationStationCode2" class="java.lang.String">
<fieldDescription><![CDATA[FlightLog.FlightLog\\.destinationStationCode]]></fieldDescription>
</field>
我该怎么做?
UPDATE
我的jrxml是,
<?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="Test" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="062e3e2d-b648-49c7-b4a5-1d3c4fbdfc6b">
<queryString language="json">
<![CDATA[]]>
</queryString>
<field name="FlightLog" class="java.lang.Object">
<fieldDescription><![CDATA[FlightLog]]></fieldDescription>
</field>
<detail>
<band height="20" splitType="Stretch">
<textField isStretchWithOverflow="true">
<reportElement x="0" y="0" width="555" height="20" uuid="dc09b2c4-31b1-4458-8097-2e912e80b3a2"/>
<textFieldExpression><![CDATA[$F{FlightLog}.get("FlightLog.destinationStationCode")]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
更新2
我无法将数据传递到子报告,例如:我有一个像下面这样的json,
"MaintLogResource":{
"MaintLogResource._lockVersion":"0",
"MaintLogResource.resource":[
{
"TEST" : "TEST1",
"ResourceType.resourceTimeHours":3.0,
"ResourceType.resourceDescription":"resourceDescription",
"ResourceType.resourceCount":2,
"ResourceType.resourceIdentifier":{
"ResourceIdentifier.resourceIdentifier":"resourceIdentifier",
"ResourceIdentifier.typeOfResourceIdentifier":"EQUIPMENT"
}
}
]
}
如何将其传递给子报告,
我试过以下,
((net.sf.jasperreports.engine.data.JsonDataSource)((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("MaintLogResource")).subDataSource("MaintLogResource.resource")
但是上面的代码给了我错误,
net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :
Source text : ((net.sf.jasperreports.engine.data.JsonDataSource)((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("MaintLogResource")).subDataSource("MaintLogResource")
at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:203)
at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:591)
at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:559)
at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:966)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:392)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:294)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:455)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2044)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:778)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:288)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:151)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:909)
at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:126)
at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:464)
at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:300)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:757)
at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:1003)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
Caused by: net.sf.jasperreports.engine.JRException: No node available. Iterate or rewind the data source.
at net.sf.jasperreports.engine.data.JsonDataSource.subDataSource(JsonDataSource.java:445)
at net.sf.jasperreports.engine.data.JsonDataSource$subDataSource$0.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at Logbook_1434518442194_713295.evaluate(calculator_Logbook_1434518442194_713295:311)
at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:190)
... 19 more
如何将数据传递到子报告?
UPDATE3
我能够将数据传递到子报告,如下所示,
new net.sf.jasperreports.engine.data.JsonDataSource(new ByteArrayInputStream($F{MaintLogResource}.get("MaintLogResource.resource").toString().getBytes()), "")
当我用&#34;。&#34;我无法获得该值,而如果没有点的密钥我能够读取该值,例如:我能够获得密钥的值&#34; TEST&#34;但不适合其他人。
答案 0 :(得分:2)
destinationStationCode
是FlightLog
中的密钥,因此可以直接访问。相同的规则应用于其他键,直到任何键具有句点符号,如FlightLog.destinationStationCode
,因为句点具有其自己的含义(对象的访问属性)。因此,它没有给出任何价值(您可以通过任何其他字符替换句号来验证,说&#34; _&#34;,然后所有工作)。
要访问此媒体资源,建议您创建FlightLog
类型的字段Object
,例如
<field name="FlightLog" class="java.lang.Object">
<fieldDescription><![CDATA[FlightLog]]></fieldDescription>
</field>
并访问其属性,如
<textField>
<reportElement x="0" y="0" width="555" height="29" uuid="afa65308-c0ae-4375-b8e5-99af4b69e02e"/>
<textFieldExpression><![CDATA[$F{FlightLog}.destinationStationCode]]></textFieldExpression>
</textField>
<textField>
<reportElement x="0" y="29" width="555" height="29" uuid="2009cbd3-7fb7-4d9e-8067-b03937aefcaa"/>
<textFieldExpression><![CDATA[$F{FlightLog}.get("FlightLog.destinationStationCode")]]></textFieldExpression>
</textField>
希望这有帮助。
我的档案 -
<强> JSON 强>
{
"FlightLog":{
"FlightLog.crewMembers":[
],
"destinationStationCode":"JPN",
"FlightLog.destinationStationCode":"IND",
"FlightLog.originStationCode":"IND",
"FlightLog._lockVersion":"0",
"FlightLog.flightNum":"123"
}
}
<强> JRXML 强>
<?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="report1" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="53cc1a16-1ec1-486c-82f6-51915fa4b069">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<field name="FlightLog" class="java.lang.Object">
<fieldDescription><![CDATA[FlightLog]]></fieldDescription>
</field>
<detail>
<band height="58" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="555" height="29" uuid="afa65308-c0ae-4375-b8e5-99af4b69e02e"/>
<textFieldExpression><![CDATA[$F{FlightLog}.destinationStationCode]]></textFieldExpression>
</textField>
<textField>
<reportElement x="0" y="29" width="555" height="29" uuid="2009cbd3-7fb7-4d9e-8067-b03937aefcaa"/>
<textFieldExpression><![CDATA[$F{FlightLog}.get("FlightLog.destinationStationCode")]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>