多项选择题
A.A filter must implement the destroy method.
B.A filter must implement the doFilter method.
C.A servlet may have multiple filters associated with it.
D.A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
E.A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
单项选择题 All of your JSPs need to have a link that permits users to email the web master. This web application islicensed to many small businesses， each of which have a different email address for the web master. Youhave decided to use a context parameter that you specify in the deployment descriptor， like this： 42.<context-param> 43.<param-name>webmasterEmail</param-name> 44.<param-value>master@example.com</param-value> 45.</context-param> Which JSP code snippet creates this email link？（）
单项选择题 WhichensuresthataJSPresponseisoftype"text/plain"？（）
单项选择题 You are building your own layout mechanism by including dynamic content for the page’s header and footersections. The footer is always static， but the header generates the <title> tag that requires the page name tobe specified dynamically when the header is imported. Which JSP code snippet performs the import of theheader content？（）