Why use PathVariable instead of HttpServletRequest?

Using PathVariable is very simple

This function allows you to use the value entered in url
ex.) /users/seonggil
→ return Seonggil’s UserInfo

I’ll focus on “why”
HttpServletRequest was used to get these values.
These values were obtained from url using httpServletRequest,
However, the reason for using PathVariable is clear

I’ll explain this reason now

Most RestApi writes the resource number to the URL path
like this
GET /users/1234, /users/4321

As described above, this request is mapped like /users/{userId} in Controller

Of course, using HttpServletRequest can yield the same results
request.getParameter()

But, It isn’t the way the spring orientation
Because Boilerplate

Code that is reused in multiple locations with minimal change and is repeatedly similar in form

This makes maintenance difficult

Therefore, the role of the boiler plate delegate to the spring using the annotation @PathVariable

That’s what I thought about this
I don’t know if it’s right

But I think this is one of the role of the framework

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