JSP General - Overriding JSP Server Generated Servlet Subclass

Overriding JSP Server Generated Servlet Subclass

Q

How do I have the JSP-generated servlet subclass be my own custom servlet class, instead of the default?

✍: FYICENTER.com

A

One should be very careful when having JSP pages extend custom servlet classes as opposed to the default one generated by the JSP engine. In doing so, you may lose out on any advanced optimization that may be provided by the JSPengine.

In any case, your new superclass has to fulfill the contract with the JSP engine by: Implementing the HttpJspPage interface, if the protocol used is HTTP, or implementing JspPage otherwise Ensuring that all the methods in the Servlet interface are declared final.

Additionally, your servlet superclass also needs to do the following:

The service() method has to invoke the _jspService() method
The init() method has to invoke the jspInit() method
The destroy() method has to invoke jspDestroy()

If any of the above conditions are not satisfied, the JSP engine may throw a translation error.

2007-04-03, 4898👍, 0💬

Overriding JSP Server Generated Servlet Subclass
How do I have the JSP-generated servlet subclass be my own custom servlet class, instead of the default? One should be very careful when having JSP pages extend custom servlet classes as opposed to the default one generated by the JSP engine. In doing so, you may lose out on any advanced optimizatio... 2007-04-03, 4899👍, 0💬

Setting Session Timeout Period
Is there a way I can set the inactivity lease period on a per-session basis? Typically, a default inactivity lease period for all sessions is set within your JSPengine admin screen or associated properties file. However, if your JSP engine supports the Servlet 2.1 API, you can manage the inactivity ... 2007-04-03, 4770👍, 0💬

Servlet Communicates with JSP Pages
How does a servlet communicate with a JSP page? The following code snippet shows how a servlet instantiates a bean and initializes it with FORM data posted by a browser. The bean is then placed into the request, and the call is then forwarded to the JSP page, Bean1.jsp, by means of a request dispatc... 2007-04-03, 4731👍, 0💬

Serialized JavaBean
Can a JSP page instantiate a serialized bean? No problem! The useBean action specifies the beanName attribute, which can be used for indicating a serialized bean. A couple of important points to note. Although you would have to name your serialized file like "filename.ser", you only indicate "filena... 2007-04-03, 4642👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.