This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Which version of weblogic u are using? I use weblogic5.1 and it does not support the servlet api up to date. So what I did was download tomcat and add tomcat library in weblogic project property. Try it