What Is @PatchMapping?

Why put is Idempotent and patch is not?

Since PUT request (so does PATCH for that matter) updates the resource, so it can’t be cached and hence it’s not SAFE.

So multiple calls to PATCH request could end up in undesirable change in the resource state.

Hence it is not IDEMPOTENT ..

Why put is Idempotent in rest?

HTTP PUT. Generally – not necessarily – PUT APIs are used to update the resource state. If you invoke a PUT API N times, the very first request will update the resource; then rest N-1 requests will just overwrite the same resource state again and again – effectively not changing anything. Hence, PUT is idempotent.

What is Autowire?

Autowiring feature of spring framework enables you to inject the object dependency implicitly. It internally uses setter or constructor injection. Autowiring can’t be used to inject primitive and string values. It works with reference only.

How do I use RequestParam?

In Spring MVC, the @RequestParam annotation is used to read the form data and bind it automatically to the parameter present in the provided method….Here, we validate the password with a specific value.Add dependencies to pom.xml.