public abstract String value
If not specified, the method will be used as default handler: i.e. for action requests where no specific action mapping was found.
Note that all such annotated action methods only apply within the
@RequestMapping constraints of the containing handler class.
public abstract String params
Same format for any environment: a sequence of "myParam=myValue" style expressions, with a request only mapped if each such parameter is found to have the given value. "myParam" style expressions are also supported, with such parameters having to be present in the request (allowed to have any value). Finally, "!myParam" style expressions indicate that the specified parameter is not supposed to be present in the request.