How do I check that a session object contains a particular key/value entry
Question
I want to check if a certain key/value pair has been set.
How do I check if a an entry with key named "keyName" exists. Sample code or a pointer to an example would be appreciated.
2 answers
solution1
4 ACCPTED 2009-11-04 14:36:36
如果要在“未设置”和null之间进行session.getAttributeNames() ，请逐步执行session.getAttributeNames()并搜索您的密钥名称。
solution2
2 2009-11-04 14:28:24
Heres a simple introductory tutorial to JSP Sessions
In essence you should just need to check that session.getAttribute("keyName") is not null.
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