) The httpMethodConstraints attribute specifies one or more constraints for some specific HTTP methods, whereas the value attribute specifies a constraint that applies for all other HTTP methods which are not specified by the httpMethodConstraints attribute. If the name attribute is not defined, the fully qualified name of the class is used. The Servlet container will pass a Set containing implementation classes of the listed types to the method onStartup(). annotation syntaxThe usage of annotation is as follows: = , This annotation is used to declare the configuration of an Servlet. In the above code, we specify two class types: and . The MultipartConfig annotation is used to annotate a servlet class in order to handle multipart/form-data requests and configure various upload settings. So, the root declaration of your web.xml must look like below (make sure you remove any DOCTYPE from web.xml too, otherwise it will still be interpreted as Servlet 2.3). We can use annotations in Struts 2 to configure it’s action classes and result pages, check working example at Struts 2 Hello World Annotation Example. This annotation is used to declare the class types that a ServletContainerInitializer can handle. Defines the data protection requirements that must be satisfied by the transport. The annotations and are used within the annotation to define the security constraints.These annotations provide an alternative mechanism for specifying security constraints declaratively by elements in the web.xml file. The support for servlet API annotations was only added in Servlet 3.0 (Tomcat 7). Java Annotations Updates: Servlet Specs 3.0 introduced use of annotations for Servlet Configuration and init parameters, read more at Java Servlet Tutorial. Defines the access semantic to be applied to an empty rolesAllowed array. In addition to that, you can use the OpenAPI swagger annotations like Operation to add more information and generate a complete documentation. The annotation is used to specify security constraints on a Java servlet. You dont have to use JAX-RS to leverage JAX-RS annotations So you can use Path or Get on your servlets to drive Swagger for the documentation generation.
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