jasperreport生成pdf_jasperreport 导出excel_jasperreport json(62)

introducing subreports into master reports.

XML Syntax

<!ELEMENT subreport (reportElement, parametersMapExpression?,

subreportParameter*, (connectionExpression | dataSourceExpression)?,

subreportExpression?)>

<!ATTLIST subreport

isUsingCache (true | false) "true"

>

<!ELEMENT parametersMapExpression (#PCDATA)>

<!ELEMENT subreportParameter (subreportParameterExpression?)>

<!ATTLIST subreportParameter

name NMTOKEN #REQUIRED

>

<!ELEMENT subreportParameterExpression (#PCDATA)>

<!ELEMENT connectionExpression (#PCDATA)>

<!ELEMENT dataSourceExpression (#PCDATA)>

<!ELEMENT subreportExpression (#PCDATA)>

<!ATTLIST subreportExpression

class (java.lang.String | java.io.File | java.net.URL |

java.io.InputStream | dori.jasper.engine.JasperReport) "java.lang.String"

>

Subreport Expression

Just like normal report designs, subreport designs are in fact dori.jasper.engine.JasperReport

objects. Those are obtained after compiling a dori.jasper.engine.design.JasperDesign object

as seen in the 3.2 Compiling Report Designs section of this book.

The JasperReports Ultimate Guide

Page 64

We have seen that the text field elements have an expression that will be evaluated to obtain the text

content to display. The image elements have an expression representing the source of the image to

display. In the same way, subreport elements have an expression that is evaluated at runtime, in order

to obtain the source of the dori.jasper.engine.JasperReport object to load.

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