java-servlet servlet生命周期: http://www.cnblogs.com/xuekyo/archive/2013/02/24/2924072.html http://blog.csdn.net/javaloveiphone/article/details/8154791 什么是servlet: http://blog.csdn.net/snarlfuture/article/details/18473761 servlet和web容器之间的关系: http://blog.csdn.net/seelye/article/details/8469575