This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Thanks for all your replies, and I am very delighted due to your kindly help
Actually, I am a newer of Java servlet and created a simple servlet called hello.
The following is the code
I have do all procedures (installing server according to the instruction proposed both on internet and my lab notes) lots of times. However the error still occurs. Indeed, I don't know how to match the mapping and I think the eclipse can do it internally.