Problem with FileItem of File Upload?

Hi Everybody,
I wrote a mail program using JSP as the front end and Servlet at the backend and inorder to upload the files from the client machine to the server machine i used the FileItem and DiskFileUpload interfaces...
But i am getting a problem ... if i use FileItem i cant use the "req (of type HttpServletRequest)" related methods and even if i use they will return null.
Is there any chance that i can use both FileItem and Request methods in the same servlet?
Is there any chance that i can find out the Client Machine IP Address using FileItem?
Thanks in advance

Hi,
I upload the par file using the browser and i am able to upload using the path sysAdmin>support->adminconsole.
But i ma unable to deploy the PAR from NWDS.
I implement the actions what you suggested and i agve some name like epserver as alias after this .I am got 502 error now also..
[28.12.06 / 19:29] #ERROR LEVEL# com.sap.portal.developmentTools.ideSpecific.eclipse.wizards.sapmakepar.SAPMPWizard$1 > No Information java.io.IOException: Server returned HTTP response code: 502 for URL: http://hddlgsdmnk-20:50100/irj/servlet/prt/portal/prteventname/upload/prtroot/com.sap.portal.runtime.system.console.ArchiveUploader?login_submit=on&j_user=epuser&j_password=Abcd1234&j_authscheme=default&uidPasswordLogon=Log%20on at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:800) at com.sap.portal.developmentTools.general.wizards.upload.DeployEngine.readResponse(DeployEngine.java:361)at com.sap.portal.developmentTools.general.wizards.upload.DeployEngine.uploadPar(DeployEngine.java:433)
Regds
Phani

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