Accessing SAP backend from j2ee without entrprise portal

Hi All,

I have a requirement which is migrating the applications hosted on tomcat server to SAP web AS and accessing the SAP ERP system from the web application.As of now i have two options one is importing the web application into NWDS and creating a webdynpro application or creating j2ee application.

<b>Now my doubt is how do i access sap ERP system from the application(I dont have any enterprise portal which should have made my job easy by creating JCO destinations and accessing them in the webdynpro application)</b>

Please let me know how to access backend from j2ee or webynpro from NWDS without Enterprise portal

Thanks

Bala