如何以编程方式为 BIRT 报告设置数据源?
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【中文标题】如何以编程方式为 BIRT 报告设置数据源?【英文标题】:How to set a datasource for a BIRT report programmatically? 【发布时间】:2011-03-15 17:46:35 【问题描述】:我有一个连接到我们的测试数据库的 BIRT 报告。在生产环境中,我想提供一个由容器通过 jndi 提供的数据源。
如何以编程方式为给定报告设置数据源?
...
IReportRunnable design = birtEngine.openReportDesign ( new File ( properties.getProperty ( "reportPath" ), report + ".rptdesign" ).getAbsolutePath () );
IRunAndRenderTask task = birtEngine.createRunAndRenderTask ( design );
PDFRenderOption options = new PDFRenderOption ();
options.setOutputFormat ( PDFRenderOption.OUTPUT_FORMAT_PDF );
options.setOutputStream ( out );
task.setRenderOption ( options );
for ( Entry<String, Object> entry : parameters.entrySet () )
task.setParameterValue ( entry.getKey (), entry.getValue () );
task.run ();
task.close ();
...
我想我必须修改 design
但另一方面 task
有一个方法 setDataSource
但这看起来有点像我必须提供一些 xml dom 元素。
【问题讨论】:
【参考方案1】:看看下面的代码,你可能会在运行时提供数据源方面得到一些帮助。
按照我的要求,它工作正常。
我是从某个网站得到的,不记得了。
import java.io.IOException;
import java.util.ArrayList;
import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.model.api.CellHandle;
import org.eclipse.birt.report.model.api.DataItemHandle;
import org.eclipse.birt.report.model.api.DesignConfig;
import org.eclipse.birt.report.model.api.ElementFactory;
import org.eclipse.birt.report.model.api.IDesignEngine;
import org.eclipse.birt.report.model.api.IDesignEngineFactory;
import org.eclipse.birt.report.model.api.LabelHandle;
import org.eclipse.birt.report.model.api.OdaDataSetHandle;
import org.eclipse.birt.report.model.api.OdaDataSourceHandle;
import org.eclipse.birt.report.model.api.PropertyHandle;
import org.eclipse.birt.report.model.api.ReportDesignHandle;
import org.eclipse.birt.report.model.api.RowHandle;
import org.eclipse.birt.report.model.api.SessionHandle;
import org.eclipse.birt.report.model.api.StructureFactory;
import org.eclipse.birt.report.model.api.TableHandle;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.structures.ComputedColumn;
import com.ibm.icu.util.ULocale;
/**
* Dynamic Table BIRT Design Engine API (DEAPI) demo.
*/
public class DECreateDynamicTable
ReportDesignHandle designHandle = null;
ElementFactory designFactory = null;
StructureFactory structFactory = null;
public static void main( String[] args )
try
DECreateDynamicTable de = new DECreateDynamicTable();
ArrayList al = new ArrayList();
al.add("USERNAME");
al.add("COUNTRY");
de.buildReport(al, "From GTM_REPORT_APP_USER" );
catch ( IOException e )
// TODO Auto-generated catch block
e.printStackTrace();
catch ( SemanticException e )
// TODO Auto-generated catch block
e.printStackTrace();
void buildDataSource( ) throws SemanticException
OdaDataSourceHandle dsHandle = designFactory.newOdaDataSource(
"Data Source", "org.eclipse.birt.report.data.oda.jdbc" );
dsHandle.setProperty( "odaDriverClass",
"oracle.jdbc.driver.OracleDriver" );
dsHandle.setProperty( "odaURL", "jdbc:oracle:thin:@xeon:1521:ora9i" );
dsHandle.setProperty( "odaUser", "AIMS_GTMNE" );
dsHandle.setProperty( "odaPassword", "AIMS_GTMNE" );
designHandle.getDataSources( ).add( dsHandle );
void buildDataSet(ArrayList cols, String fromClause ) throws SemanticException
OdaDataSetHandle dsHandle = designFactory.newOdaDataSet( "ds",
"org.eclipse.birt.report.data.oda.jdbc.JdbcSelectDataSet" );
dsHandle.setDataSource( "Data Source" );
String qry = "Select ";
for( int i=0; i < cols.size(); i++)
qry += " " + cols.get(i);
if( i != (cols.size() -1) )
qry += ",";
qry += " " + fromClause;
dsHandle.setQueryText( qry );
designHandle.getDataSets( ).add( dsHandle );
void buildReport(ArrayList cols, String fromClause ) throws IOException, SemanticException
//Configure the Engine and start the Platform
DesignConfig config = new DesignConfig( );
config.setProperty("BIRT_HOME", "D:/Softwares/Frame Works - APIs-Tools/birt-runtime-2_6_1/birt-runtime-2_6_1/ReportEngine");
IDesignEngine engine = null;
try
Platform.startup( config );
IDesignEngineFactory factory = (IDesignEngineFactory) Platform.createFactoryObject( IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY );
engine = factory.createDesignEngine( config );
catch( Exception ex)
ex.printStackTrace();
SessionHandle session = engine.newSessionHandle( ULocale.ENGLISH ) ;
try
//open a design or a template
designHandle = session.openDesign("D:/tempBirtReport/test.rptdesign");
designFactory = designHandle.getElementFactory( );
buildDataSource();
buildDataSet(cols, fromClause);
TableHandle table = designFactory.newTableItem( "table", cols.size() );
table.setWidth( "100%" );
table.setDataSet( designHandle.findDataSet( "ds" ) );
PropertyHandle computedSet = table.getColumnBindings( );
ComputedColumn cs1 = null;
for( int i=0; i < cols.size(); i++)
cs1 = StructureFactory.createComputedColumn();
cs1.setName((String)cols.get(i));
cs1.setExpression("dataSetRow[\"" + (String)cols.get(i) + "\"]");
computedSet.addItem(cs1);
// table header
RowHandle tableheader = (RowHandle) table.getHeader( ).get( 0 );
for( int i=0; i < cols.size(); i++)
LabelHandle label1 = designFactory.newLabel( (String)cols.get(i) );
label1.setText((String)cols.get(i));
CellHandle cell = (CellHandle) tableheader.getCells( ).get( i );
cell.getContent( ).add( label1 );
// table detail
RowHandle tabledetail = (RowHandle) table.getDetail( ).get( 0 );
for( int i=0; i < cols.size(); i++)
CellHandle cell = (CellHandle) tabledetail.getCells( ).get( i );
DataItemHandle data = designFactory.newDataItem( "data_"+(String)cols.get(i) );
data.setResultSetColumn( (String)cols.get(i));
cell.getContent( ).add( data );
designHandle.getBody( ).add( table );
// Save the design and close it.
designHandle.saveAs( "D:/tempBirtReport/test.rptdesign" ); //$NON-NLS-1$
designHandle.close( );
System.out.println("Finished");
catch (Exception e)
e.printStackTrace();
【讨论】:
【参考方案2】:您可以为数据库连接字符串创建报表参数。
然后,在Data Source -> Property Binding -> JNDI URL下设置JNDI URL,为:params["Database"].value (其中“Database”是报表参数的名称)
【讨论】:
【参考方案3】:在运行时仅设置数据源会产生问题,因为数据集绑定到单个数据源,然后报表上的控件会绑定到特定数据集。每次运行报表时尝试构建自己的层次结构会非常棘手。
您可以参数化数据源定义的所有方面,使您的设计可在所有环境中移植。编辑数据源时,请查看左侧的属性绑定分组。这应该为您提供足够的灵活性,使您的数据源更具可移植性。您可以为 JDBC URL 元素或运行时 JNDI 配置文件指定运行时参数。
希望这会有所帮助。
【讨论】:
【参考方案4】:我喜欢亚当斯的方法。 以下是我们的做法:
/*
* Change the data sources in the .rptdesign
*/
void changeDataSource(ElementFactory designFactory,
ReportDesignHandle designHandle, String userConnect)
throws SemanticException
SlotHandle datasources = designHandle.getDataSources();
SlotIterator iter = (SlotIterator) datasources.iterator();
while (iter.hasNext())
DesignElementHandle dsHandle = (DesignElementHandle) iter.next();
if (dsHandle instanceof OdaDataSourceHandle && dsHandle.getName().equals("lisa"))
log.debug("changeDataSource: Changing datasource "
+ dsHandle.getName() + " new url=" + getLisaDbUrl());
dsHandle.setProperty("odaDriverClass",
"oracle.jdbc.driver.OracleDriver");
dsHandle.setProperty("odaURL", getLisaDbUrl());
dsHandle.setProperty("odaUser", getLisaUser());
dsHandle.setProperty("odaPassword", getLisaPassword());
else
log.debug("changeDataSource: Ignoring DS " + dsHandle.getName());
这里,“lisa”是我们希望在运行时更改的数据源的名称。 get... 函数返回“生产”运行时所需的值。
【讨论】:
【参考方案5】:这对我有用。我得到了上下文,从上下文中得到了数据源,并将连接传递给了 Birt 报告,如下所示
Context initialContext = new InitialContext();
if ( initialContext == null)
System.out.println("JNDI problem. Cannot get InitialContext.");
DataSource datasource = (DataSource)initialContext.lookup("java:/datasources/SAMPLE");
task.getAppContext().put("OdaJDBCDriverPassInConnection", datasource.getConnection());
【讨论】:
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