GivenaFilterclassdefinitionwiththismethod：21.publicvoiddoFilter（ServletRequestrequest，22.ServletResponseresponse，23.FilterChainchain）24.throwsServletException，IOException{25.//insertcodehere26.}Whichshouldyouinsertatline25toproperlyinvokethenextfilterinthechain，orthetargetservletiftherearenomorefilters？（）A.chain.forward（request，response）；B.chain.doFilter（request，response）；C.request.forward（request，response）；D.request.doFilter（request，response）；
GivenaFilterclassdefinitionwiththismethod：21.publicvoiddoFilter（ServletRequestrequest，22.ServletResponseresponse，23.FilterChainchain）24.throwsServletException，IOException{25.//insertcodehere26.}Whichshouldyouinsertatline25toproperlyinvokethenextfilterinthechain，orthetargetservletiftherearenomorefilters？（）
A.chain.forward（request，response）；
B.chain.doFilter（request，response）；
C.request.forward（request，response）；
D.request.doFilter（request，response）；
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Given:10.publicvoidservice(ServletRequestrequest,11.ServletResponseresponse){12.ServletInputStreamsis=13.／／insertcodehere14.}Whichretrievesthebinaryinputstreamonline13?() A.request.getWriter（）；B.request.getReader（）；C.request.getInputStream（）；D.request.getResourceAsStream（）；
在一个Filter中，处理filter业务的是（）方法。A．dealFilter (ServletRequest request,ServletResponse response,FilterChain chain)B．dealFilter (ServletRequest request,ServletResponse response)C．doFilter (ServletRequest request,ServletResponse response, FilterChain chain)D．doFilter (ServletRequest request,ServletResponse response)
【单选题】在一个Filter中，处理filter业务的是（）方法A．dealFilter (ServletRequestrequest,ServletResponse response,FilterChain chain)B．dealFilter (ServletRequestrequest,ServletResponse response)C．doFilter (ServletRequestrequest,ServletResponse response, FilterChain chain)D．doFilter (ServletRequestrequest,ServletResponse response)