Reading Request Parameters
Read request parameters with @RequestParameter.
Reading Cookies
Read cookie values with @CookieParameter.
Reading Request Headers
Read request headers with @HeaderParameter.
Reading URL Query Parameters
Read URL query parameters with @QueryParameter.
Reading Attributes
Read request attributes with @AttributeParameter.
Request Parameter Groups
Bind many request parameters into a grouped object.
Automatic Parameter Type Conversion
Convert request parameter values to common Java types automatically.