Answer Posted / vkrishna88

ServletConfig:
1)An object of ServletConfig exists one per Servlet...
2)An object of ServletConfig will be created when
init(ServletConfig)method is executed...
3)The data to a servlet which related to ServletConfig
object must be written in <init-param>....</init-param> with
in <servlet>…</servlet> of web.xml....
4)An object of ServletConfig will exists as long as a
specific Servlet is executing.

ServletContext:
1)An object of ServletContext exists one per web application....
2)An object of ServletContext will be created when we deploy
the web application in servlet container or servlet
execution environment......
3)The common data or global data related to ServletContext
must be written under <context-param>…</context-param> with
in <web-app>....</web-app> and outside of
<servlet>...</servlet> of web.xml....
4)An object of ServletContext will exists until the entire
web application completed its execution.....

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hi actully i hav form columns with origin and destination names .as like as i need to create one more column with name amount. my requirement is when i select origin and destination columns automatically i need to get amount from database.how can i. please tel me with relative code

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