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simply put, @requestmapping marks request handler methods inside @controller classes; it can be configured using: we can provide default settings for all handler methods in a @controller class if we apply this annotation on the class level. moreover, @getmapping, @postmapping, @putmapping, @deletemapping, and @patchmapping are different variants of @requestmapping with the http method already set to get, post, put, delete, and patch respectively. we can specify the uri template with the @requestmapping annotation and bind a method argument to one of the template parts with @pathvariable. if the name of the part in the template matches the name of the method argument, we don’t have to specify it in the annotation: in addition to those settings, with @requestparam we can specify an injected value when spring finds no or empty value in the request.
if we mark a request handler method with @responsebody, spring treats the result of the method as the response itself: with this annotation, we can declare a custom error handler method. we can specify the desired http status of the response if we annotate a request handler method with this annotation. we can declare the status code with the code argument, or its alias, the value argument. we can define a spring mvc controller with @controller. with this annotation we can access elements that are already in the model of an mvc @controller, by providing the model key: like with @pathvariable and @requestparam, we don’t have to specify the model key if the argument has the same name: besides, @modelattribute has another use: if we annotate a method with it, spring will automatically add the method’s return value to the model: before spring calls a request handler method, it invokes all @modelattribute annotated methods in the class.
spring annotations spring mvc basics uri template with the @ requestmapping annotation and for example, invoking an annotated controller requires resolving various annotations. thus the main purpose of a this tutorial provides spring mvc annotation example with java config(no xml) along with different , spring mvc example, spring mvc example, spring mvc:annotation configuration example, spring boot annotations, spring mvc flow.
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