Using @PathVariable for RESTful API Parameters in Spring MVC

The author, a senior architect, introduces the distinction between ordinary endpoint naming and RESTful style, noting that the '/' character represents hierarchical relationships between resources.

In a typical non‑RESTful endpoint, two required parameters such as lessonId and lessonType are passed directly in the URL, as shown in the first illustration.

When adopting RESTful URLs, the @PathVariable annotation should be used to bind URL segments to method parameters. The article provides a diagram demonstrating this usage.

For required parameters, the correct syntax is illustrated with an example that includes both lessonId and lessonType annotated with @PathVariable , resulting in a successful request.

If some parameters are optional, the @PathVariable annotation can be configured with required=false . The article shows how to declare all possible URL patterns and mark the optional parameters accordingly.

The author points out that when more than two parameters are needed, enumerating every possible URL quickly becomes cumbersome, and recommends using the POST method for complex queries to simplify the implementation.

In addition to the technical guidance, the article contains promotional elements: a special gift for replying with certain keywords, links to an open‑source admin system with source code, a collection of BAT interview questions, and an invitation to join a senior architect community group.