Code for validating username and password in jsp
A context will use background processing to perform session expiration and class monitoring for reloading.
If not specified, the default value for this attribute is -1, which means the context will rely on the background processing thread of its parent host.
of this web application, which is matched against the beginning of each request URI to select the appropriate web application for processing.
All of the context paths within a particular Host must be unique.
The web application used to process each HTTP request is selected by Catalina based on matching the longest possible prefix of the Request URI against the of each defined Context.