多选题Given: 3.public class MyTagHandler extends TagSupport { 4.public int doStartTag() { 5.// insert code here 6.// return an int 7.} 8.// more code here ... 18.} There is a single attribute foo in the session scope. Which three code fragments,inserted independently atline 5,return the value of the attribute?()AObject o = pageContext.getAttribute(foo);BObject o = pageContext.findAttribute(foo);CObject o = pageContext.getAttribute(foo,PageContext.SESSION_SCOPE);DHttpSession s = pageContext.getSession();Object o = s.getAttribute(foo);

多选题
Given: 3.public class MyTagHandler extends TagSupport { 4.public int doStartTag() { 5.// insert code here 6.// return an int 7.} 8.// more code here ... 18.} There is a single attribute foo in the session scope. Which three code fragments,inserted independently atline 5,return the value of the attribute?()
A

Object o = pageContext.getAttribute(foo);

B

Object o = pageContext.findAttribute(foo);

C

Object o = pageContext.getAttribute(foo,PageContext.SESSION_SCOPE);

D

HttpSession s = pageContext.getSession();Object o = s.getAttribute(foo);


参考解析

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