BIRT: Dynamic Report Servlet

http://wiki.eclipse.org/Java_-_Dynamic_Report_Servlet_(BIRT)

Html代码

<html>

<head>

</head>

<body>

The Query that is used for this example is Select * From OFFICES

<option value="COUNTRY">COUNTRY</option>

<option value="STATE">STATE</option>

<option value="OFFICECODE">OFFICECODE</option>

<option value="ADDRESSLINE1">ADDRESSLINE1</option>

<option value="ADDRESSLINE2">ADDRESSLINE2</option>

<option value="POSTALCODE">POSTALCODE</option>

<option value="TERRITORY">TERRITORY</option>

</select>

</form>

</body>

</html>

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Java代码

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.eclipse.birt.report.engine.api.EngineConstants;

import org.eclipse.birt.report.engine.api.HTMLRenderOption;

import org.eclipse.birt.report.engine.api.IReportRunnable;

import org.eclipse.birt.report.engine.api.IRunAndRenderTask;

import org.eclipse.birt.report.engine.api.IReportEngine;

import org.eclipse.birt.report.model.api.CellHandle;

import org.eclipse.birt.report.model.api.DataItemHandle;

import org.eclipse.birt.report.model.api.ElementFactory;

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.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 org.eclipse.birt.report.engine.api.HTMLServerImageHandler;

public class DynamicReport extends HttpServlet {

/**

private static final long serialVersionUID = 1L;

/**

* Constructor of the object.

private IReportEngine birtReportEngine = null;

protected static Logger logger = Logger.getLogger( "org.eclipse.birt" );

public DynamicReport() {

super();

}

/**

* Destruction of the servlet.

public void destroy() {

super.destroy();

BirtEngine.destroyBirtEngine();

}

/**

* The doGet method of the servlet.

public void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

//get report name and launch the engine

resp.setContentType("text/html");

//resp.setContentType( "application/pdf" );

//resp.setHeader ("Content-Disposition","inline; filename=test.pdf");

String reportName = req.getParameter("ReportName");

String[] cols = (String[])req.getParameterMap().get("dyna1");

ServletContext sc = req.getSession().getServletContext();

this.birtReportEngine = BirtEngine.getBirtEngine(sc);

IReportRunnable design;

try

{

//Open report design

design = birtReportEngine.openReportDesign( sc.getRealPath("/Reports")+"/"+reportName );

ReportDesignHandle report = (ReportDesignHandle) design.getDesignHandle( );

buildReport( cols, report );

//create task to run and render report

IRunAndRenderTask task = birtReportEngine.createRunAndRenderTask( design );

task.setAppContext( contextMap );

//set output options

HTMLRenderOption options = new HTMLRenderOption();

options.setImageHandler( new HTMLServerImageHandler() );

options.setImageDirectory( sc.getRealPath("/images");

options.setBaseImageURL( req.getContextPath() + "/images" );

options.setOutputFormat(HTMLRenderOption.OUTPUT_FORMAT_HTML);

//options.setOutputFormat(HTMLRenderOption.OUTPUT_FORMAT_PDF);

options.setOutputStream(resp.getOutputStream());

task.setRenderOption(options);

//run report

task.run();

task.close();

}catch (Exception e){

e.printStackTrace();

throw new ServletException( e );

}

public void buildReport(String[] cols, ReportDesignHandle designHandle){

try{

ElementFactory designFactory = designHandle.getElementFactory( );

buildDataSource(designFactory, designHandle);

//ArrayList cols = new ArrayList();

//cols.add("OFFICECODE");

//cols.add("CITY");

//cols.add("COUNTRY");

buildDataSet(cols, "From Offices", designFactory, designHandle);

TableHandle table = designFactory.newTableItem( "table", cols.length );

table.setWidth( "100%" );

table.setDataSet( designHandle.findDataSet( "ds" ) );

PropertyHandle computedSet = table.getColumnBindings( );

ComputedColumn cs1 = null;

for( int i=0; i < cols.length; i++){

cs1 = StructureFactory.createComputedColumn();

cs1.setName((String)cols[i]);

cs1.setExpression("dataSetRow[\"" + (String)cols[i] + "\"]");

computedSet.addItem(cs1);

}

// table header

RowHandle tableheader = (RowHandle) table.getHeader( ).get( 0 );

for( int i=0; i < cols.length; i++){

LabelHandle label1 = designFactory.newLabel( (String)cols[i] );

label1.setText((String)cols[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.length; i++){

CellHandle cell = (CellHandle) tabledetail.getCells( ).get( i );

DataItemHandle data = designFactory.newDataItem( "data_"+(String)cols[i] );

data.setResultSetColumn( (String)cols[i]);

cell.getContent( ).add( data );

}

designHandle.getBody( ).add( table );

}catch(Exception e){

e.printStackTrace();

}

void buildDataSource( ElementFactory designFactory, ReportDesignHandle designHandle ) throws SemanticException

{

OdaDataSourceHandle dsHandle = designFactory.newOdaDataSource(

"Data Source", "org.eclipse.birt.report.data.oda.jdbc" );

dsHandle.setProperty( "odaDriverClass",

"org.eclipse.birt.report.data.oda.sampledb.Driver" );

dsHandle.setProperty( "odaURL", "jdbc:classicmodels:sampledb" );

dsHandle.setProperty( "odaUser", "ClassicModels" );

dsHandle.setProperty( "odaPassword", "" );

designHandle.getDataSources( ).add( dsHandle );

}

void buildDataSet(String[] cols, String fromClause, ElementFactory designFactory, ReportDesignHandle designHandle ) 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.length; i++){

qry += " " + cols[i];

if( i != (cols.length -1) ){

qry += ",";

}

qry += " " + fromClause;

dsHandle.setQueryText( qry );

designHandle.getDataSets( ).add( dsHandle );

}

/**

* The doPost method of the servlet.

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");

out.println("<HTML>");

out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");

out.println(" <BODY>");

out.println(" Post Not Supported");

out.println(" </BODY>");

out.println("</HTML>");

out.flush();

out.close();

}

/**

* Initialization of the servlet.

* @throws ServletException if an error occure

public void init() throws ServletException {

BirtEngine.initBirtConfig();

}

Xml代码

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"

"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>

<display-name>DynamicReport</display-name>

<servlet-name>DynamicReport</servlet-name>

<servlet-class>DynamicReport</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>DynamicReport</servlet-name>

<url-pattern>/run</url-pattern>

</servlet-mapping>

</web-app>

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BIRT: Dynamic Report Servlet

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BIRT: Dynamic Report Servlet

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