一个用于文件上传的接口 The Commons FileUpload package makes it easy to add robust, high-performance, file upload capability to your servlets and web applications.
commons-dbcp应用包 There is no difference in the codebase supporting these two versions, other than that the code implementing methods added to support JDBC 4 has been filtered out of the DBCP 1.3 sources. Both versions can be built using either Ant or
