taglibdirective. A custom action is invoked when a JSP page uses a custom tag.
String, and placed into the implicit
initmethod called by its container prior to invocation of its service method by clients or other servlets who require its functionality. After the call of its
initmethod it has the data and readiness for its intended use. The servlet's
destroymethod is called by its container prior to the ending of its existence so that processing associated with winding up may be done, and resources may be released. The
destroymethods in this example are callback methods. Similar considerations apply to all J2EE component types: enterprise beans (EJBs), web components (servlets or JSP pages), applets, and application clients.
java:comp/envJNDI context. The environment entries are declaratively specified in the component's deployment descriptor.
protocolspecifies a protocol for fetching the object (such as HTTP or FTP),
hostspecifies the Internet name of the targeted host, and
localinfois a string (often a file name) passed to the protocol handler on the remote host.