1. 建立最简单的JSP和servlet
http://wenku.baidu.com/link?url=bcf8iwB3E5_gjl46WfZAekQUWsps0-G3MAbbKz5totQcvmSf3W7fF5DT_NyR065eanJQna57YvpRIgfhUUvNWR4puJwWZyQeIxCfK1hPlIy