Java Reference
In-Depth Information
The
init()
Method
public void init()
throws ServletException
B
This parameterless implementation of the
init()
method is provided only for convenience. It
prevents a derived servlet from having to store the
ServletConfig
object.
init()
has no para-
meters and returns no value.
It throws this exception:
•
ServletException
The
log(java.lang.String message)
Method
public void log(java.lang.String message)
This
log()
method takes the passed-in message and the name of the servlet and writes them to
a log file. The location of the log is server specific.
log()
returns no value and throws no
exceptions.
It has one parameter:
•
java.lang.String
The
log(java.lang.String message, java.lang.Throwable t)
Method
public void log(java.lang.String message,
java.lang.Throwable t)
This
log()
method takes the passed-in message and
Throwable
object and logs the message
with a stack trace from the
Throwable
object.
log()
returns no value and throws no excep-
tions.
It has two parameters:
•
java.lang.String
•
java.lang.Throwable
The
service()
Method
public void service(ServletRequest request,
ServletResponse response)
throws ServletException,
java.io.IOException
The
service()
method defines the servlet's entry point for servicing requests. It can be exe-
cuted only after the servlet's
init()
method has executed successfully. The
service()
method
is the life cycle method executed for every incoming request. It returns no value.
