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What is the default request method type for the @RequestMapping?
@RequestMapping(value = "addGoal") public String addGoal(Model model) {...} 
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What is the default request mapping method? If we simply don't specify any request path value in the @RequestMapping annotation of a Controller's method, that method is designated as the default request mapping method for that class.
@RequestMapping — the HTTP Method. The HTTP method parameter has no default. So, if we don't specify a value, it's going to map to any HTTP request.
RequestMapping annotation is used to map web requests onto specific handler classes and/or handler methods. @RequestMapping can be applied to the controller class as well as methods.
The @RequestMapping annotation can be applied to class-level and/or method-level in a controller. The class-level annotation maps a specific request path or pattern onto a controller. You can then apply additional method-level annotations to make mappings more specific to handler methods.
If you do not specify any mapping this method will resolve all the http request i.e. you can send GET, POST, HEAD, OPTIONS, PUT, PATCH, DELETE, TRACE request to the specified url and it will be resolved.
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