| What am I doing wrong [message #103170] |
Mon, 02 January 2006 00:24  |
Eclipse User |
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I use outputstream in servlet program. My Program is given below. After
executing this program I get a blank page.
package report;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import org.eclipse.birt.report.engine.api.EngineConfig;
import org.eclipse.birt.report.engine.api.EngineException;
import org.eclipse.birt.report.engine.api.HTMLCompleteImageHandler;
import org.eclipse.birt.report.engine.api.HTMLEmitterConfig;
import org.eclipse.birt.report.engine.api.HTMLRenderOption;
import org.eclipse.birt.report.engine.api.IGetParameterDefinitionTa sk;
import org.eclipse.birt.report.engine.api.IParameterDefnBase;
import org.eclipse.birt.report.engine.api.IParameterGroupDefn;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.engine.api.IRunAndRenderTask;
import org.eclipse.birt.report.engine.api.IScalarParameterDefn;
import org.eclipse.birt.report.engine.api.ReportEngine;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Calendar;
import java.util.Vector;
import java.text.SimpleDateFormat;
import org.w3c.dom.*;
import org.apache.ecs.html.*;
import org.apache.ecs.HtmlColor;
import MyGrid.JSPGridGenerator.*;
public class UserRegReport extends HttpServlet
{
String reportName = null;
String format = "p";
boolean showInfo = false;
private static final String CONTENT_TYPE = "text/html";
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public static void run( String name, HashMap params,
String format, boolean showInfo )
{
// The EngineConfig is used to set up engine-wide configuration
// information.
EngineConfig config = new EngineConfig( );
// The Engine home is the location of the BIRT engine runtime.
// M3 Note: Use the report engine installed as part of the BIRT web app
// used to preview reports. Alter this path to the location of your
// Eclipse installation.
config.setEngineHome( "..\\webapps\\learnity" );
// HTML reports can have embedded images or charts. Set up the
configuration
// required to write these into a directory in the output directory.
// The HTMLCompleteImageHandler is one provided by BIRT for this purpose.
// Your application can create a customized version to provide
alternative
// ways to handle images.
HTMLEmitterConfig hc = new HTMLEmitterConfig( );
HTMLCompleteImageHandler imageHandler = new HTMLCompleteImageHandler( );
hc.setImageHandler( imageHandler );
config.setEmitterConfiguration( HTMLRenderOption.OUTPUT_FORMAT_HTML, hc
);
// Create the report engine itself. This engine can be used to run
// multiple reports.
ReportEngine engine = new ReportEngine( config );
// Open the report design.
IReportRunnable report = null;
try
{
report = engine.openReportDesign( name );
}
catch ( EngineException e )
{
System.err.println( "Report " + name + " not found!\n" );
engine.destroy( );
return;
}
if ( format != null )
{
// Hparams.put(params,params);
IRunAndRenderTask task = engine.createRunAndRenderTask( report );
HTMLRenderOption options = new HTMLRenderOption( );
options.setOutputFormat( format );
//String output = name.replaceFirst( ".rptdesign", "." + format );
options.setOutputStream( ostream );
task.setRenderOption( options );
task.setParameterValues( params );
// Run the report.
try
{
task.run( );
task = null;
}
catch ( EngineException e1 )
{
System.err.println( "Report " + name + " run failed.\n" );
System.err.println( e1.toString( ) );
}
}
engine.destroy( );
}
public void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
response.setContentType("text/html");
response.setHeader("Pragma","no-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0);
PrintWriter out = response.getWriter();
HttpSession mysession=request.getSession(true);
format = HTMLRenderOption.OUTPUT_FORMAT_PDF;
reportName = "../webapps/learnity/report/user_reg.rptdesign";
HashMap params = new HashMap();
run( reportName, params, format, showInfo );
Html html = new Html();
Head head = new Head();
Body body = new Body();
head.addElement(new Head()
.addElement(new Title("Report"))
);
response.sendRedirect("../report/user_reg.pdf");
//response.sendRedirect("../run?__report=report/category_report_piechart.rptdesign ");
html.addElement(head);
html.addElement(body);
out.print(html.toString());
}
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
doPost(request,response);
}
}
What am I doing wrong
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