iText PDF in Servlet

Question

So, i'm creating a report PDF file from my server using this code ``` response.setHeader("Expires", "0"); response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0"); response.setHeader("Pragma", "public"); response.setContentType("application/pdf"); List cartas1 = new ArrayList(); DeudorDAO DDAO = new DeudorDAO(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { baos = DocumentoCartaCobranza.CrearDocumento( getServletContext().getRealPath("static/images/pdf_banner.jpg"), getServletContext().getRealPath("static/images/firmaJG.png"), getServletContext().getRealPath("static/images/firmaAB.jpg"), DDAO.getDatosFullDeudores(cartas1) ); } catch (DocumentException e) { e.printStackTrace(); } OutputStream os = response.getOutputStream(); baos.writeTo(os); os.flush(); os.close(); ``` And ``` public static ByteArrayOutputStream CrearDocumento( String imgCabecera, String imgFirma, String imgAbogado, java.util.List carta1) throws Docu…

Accepted Answer

it is quite simple: you create a static document:

```
 private static Document Documento = new Document();
```

and then you call close on it:

```
Documento.close();
```

So the error is logical. Create the document as a method property and pass it on instead of using it as static. Using static fields in servlets is only good for caches, anything else is asking for trouble.

iText PDF in Servlet

Solution

Problem