As JSF 2.0 doesn't include a file upload component, I need to write my own
multipart/form-data process. According to the information in bug # 49711, I
cannot do this with a filter in Tomcat 7, but I can in a servlet. However,
using the following servlet, HttpRequestServlet.getPart() returns null. This
code works fine in Glassfish. It was mostly generated by Netbeans 6.9.1. The
error message follows.
Can you give me some guidance? Thanks for your kind help.
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
@WebServlet(name="FileUpload", urlPatterns={"/fileUpload.up"})
@MultipartConfig
public class FileUpload extends HttpServlet
{
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try
{
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet UploadFile</title>");
out.println("</head>");
out.println("<body>");
out.println("<form action='fileUpload.up' method='POST'
enctype='multipart/form-data' >");
out.println("<input type='file' name='fileData' />");
out.println("<br /><br />");
out.println("<input type='submit' value='Continue'/>");
out.println("</form></body>");
out.println("</html>");
}
finally
{
out.close();
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
javax.servlet.http.Part part = request.getPart("fileData");
byte[] bytes = new byte[(int) part.getSize()];
// and so on...
//processRequest(request, response);
}
}
java.lang.NullPointerException
at FileUpload.doPost(FileUpload.java:75)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:542)
at
com.sun.faces.application.view.JspViewHandlingStrategy.executePageToBuildView(JspViewHandlingStrategy.java:359)
at
com.sun.faces.application.view.JspViewHandlingStrategy.buildView(JspViewHandlingStrategy.java:150)
at
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:96)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:309)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
