[iText-questions] Questions about generate RTF using servlet with itext

Frankie Poon Sun, 07 Mar 2004 22:46:04 -0800

hi all...i am a beginner of java i don't know why i can't generate the rtf file using servlet my coding is under below... any ppl can help me pls? thank you!! i can generate the pdf with itext and servlet before.. but i don't know why i can't in rtf please help!!!

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
import com.lowagie.text.rtf.RtfWriter;

/**
This program to generate the PDF by Servlet...
**/

public class rtf extends HttpServlet
{
 public void doGet(HttpServletRequest request,
                   HttpServletResponse response)
     throws ServletException, IOException
    {

    try{
  response.setContentType( "application/rtf" );

//PrintWriter out = response.getWriter();

     // step 1: creation of a document-object
  Document document = new Document();

    // step 2:
  // we create a writer that listens to the document
  // and directs a PDF-stream to a temporary

ByteArrayOutputStream buffer = new ByteArrayOutputStream();

RtfWriter.getInstance( document, buffer );


  // step 3: we open the document
  document.open();

  // step 4: we add a paragraph to the document
  document.add(new Paragraph("Hello World!!RTF!!"));

document.close();

  // step 10: we output the writer as bytes to the response output
  DataOutput output = new DataOutputStream( response.getOutputStream() );
  byte[] bytes = buffer.toByteArray();
  response.setContentLength(bytes.length);
  for( int i = 0; i < bytes.length; i++ ) { output.writeByte( bytes[i] ); }
    }catch(Exception e){
     System.out.println(e.getMessage());
  }
System.out.println("Hello!!RTF program Ended!!");
}
}
出左以下error
javax.servlet.ServletException: Servlet execution threw an exception
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at filters.ExampleFilter.doFilter(ExampleFilter.java:149)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:213)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
.java:494)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:392)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:619)
at java.lang.Thread.run(Thread.java:536)

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[iText-questions] Questions about generate RTF using servlet with itext

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