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Could anyone please clarify the defination of attribute?
for example, in the following code, what is an attribute:
request.setAttribute("ja",new foo.Employee());
Is the attribute in the above code an object of type foo.Employee(), or it is key/value pair, or it is actually “ja”?
Request attributes are values indexed by a key (in your case “ja”) which are shared in the life of the request object. In Java filter, servlet, jsp, include and forward use same request object so for example you can push an object in a servlet and pull it in a JSP.
The same approach is for session and application scopes