[英]iText working Google App engine
我正在嘗試使用谷歌應用引擎在java中創建pdf,但它還沒有工作:
@SuppressWarnings("serial")
public class GuestbookServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("application/pdf");
try {
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream("HelloWorld.pdf"));
document.open();
document.add(new Paragraph("Hello World"));
document.close();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
這是錯誤:
HTTP ERROR 500
Problem accessing /guestbook. Reason:
com/itextpdf/text/DocumentException
Caused by:
java.lang.NoClassDefFoundError: com/itextpdf/text/DocumentException
我已經閱讀了與java.awt和java.nio與google appengine的不兼容性。 但我不知道該怎么做。 是否有特殊版本的itext到谷歌應用程序引擎? 或者你知道任何可以幫助我的線索嗎?
是的,有一個GAE版本的iText。 請訪問http://lowagie.com/iPadSchools觀看演示。 GAE端口由iText Software分發。 沒有鏈接可以上網。
package mx.gob.campeche.sit.web.reportes;
import java.io.IOException;
import java.io.OutputStream;
import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import mx.gob.campeche.sit.doc.recibo_oficial.ReciboOficial;
@WebServlet("/reciboOficial")
public class ReporteReciboOficialServlet extends HttpServlet {
@Inject
ReciboOficial reciboOficial;
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpServletRequestWrapper srw = new HttpServletRequestWrapper(request);
String folio = "";
if (request.getParameterMap().containsKey("folio")) {
folio = request.getParameter("folio");
System.out.println("contenido" + folio);
}else
if (request.getParameterMap().containsKey("numero")) {
folio = request.getParameter("numero");
System.out.println("contenido" + folio);
}else{
throw new ServletException("No ingreso parametro");
}
byte[] pdfData = reciboOficial.crearReciboOFicialCajas(folio, srw.getRealPath(""));
response.setContentType("application/pdf");
response.reset();
response.setContentType("application/pdf");
response.setHeader("Content-disposition", "inline; filename=\"" +"samplePDF2.pdf" +"\"");
OutputStream output = response.getOutputStream();
output.write(pdfData);
output.close();
}
this is small example, this help
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