Java认证考试

One of the use cases in your web application uses many session-scoped attributes. At the end of the usecase， you want to clear out this set of attributes from the session object. Assume that this static variableholds this set of attribute names： 201.priv

题目

One of the use cases in your web application uses many session-scoped attributes. At the end of the usecase， you want to clear out this set of attributes from the session object. Assume that this static variableholds this set of attribute names： 201.private static final Set USE_CASE_ATTRS；  202.static { 203.USE_CASE_ATTRS.add（"customerOID"）； 204.USE_CASE_ATTRS.add（"custMgrBean"）； 205.USE_CASE_ATTRS.add（"orderOID"）； 206.USE_CASE_ATTRS.add（"orderMgrBean"）； 207.} Which code snippet deletes these attributes from the session object？（）

  • A、session.removeAll（USE_CASE_ATTRS）；
  • B、for（ String attr ： USE_CASE_ATTRS ）{ session.remove（attr）； }
  • C、for（ String attr ： USE_CASE_ATTRS ）{session.removeAttribute（attr）；}
  • D、for（ String attr ： USE_CASE_ATTRS ）{session.deleteAttribute（attr）；}
  • E、session.deleteAllAttributes（USE_CASE_ATTRS）；
参考答案和解析
正确答案:C
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