Java Web based authentication logon
2016-08-23
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This is a normal login based programming, servlet life cycle
(1) what is the servlet life cycle?
Container how to create servlet object, how the servlet object is
Initialize method of how to invoke the servlet object processes the request, and
Destroy the servlet object throughout the process.
(2) the four phases
1) to instantiate (create)
A, what is instantiated?
Call servlet container's constructor, create servlet object.
B, when instantiated?
Case 1: the container after the request is received.
Case 2: containers created well in advance.
Required configuration parameter.
Argument is an integer greater than 0, the smaller, giving priority to
Higher the level (the first being instantiated).
Note:
Container by default, for a type of
Servlet, will only create a unique instance.
2) initialization
A, what is initialized?
After instantiation, the container will immediately call servlet
(1) what is the servlet life cycle?
Container how to create servlet object, how the servlet object is
Initialize method of how to invoke the servlet object processes the request, and
Destroy the servlet object throughout the process.
(2) the four phases
1) to instantiate (create)
A, what is instantiated?
Call servlet container's constructor, create servlet object.
B, when instantiated?
Case 1: the container after the request is received.
Case 2: containers created well in advance.
Required configuration parameter.
Argument is an integer greater than 0, the smaller, giving priority to
Higher the level (the first being instantiated).
Note:
Container by default, for a type of
Servlet, will only create a unique instance.
2) initialization
A, what is initialized?
After instantiation, the container will immediately call servlet
java
javaweb
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