@PathVariable

@PathVariable是Spring框架中的注解，用于将请求路径中的参数绑定到控制器方法的参数上。例如，如果请求路径为"/users/{userId}"，那么可以在控制器方法的参数上使用@PathVariable("userId")注解来获取该参数的值。这个注解可以方便地获取RESTful风格的请求参数。

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@pathvariable

PathVariable is a Spring annotation used to extract values from the URI (Uniform Resource Identifier) path. It is used to bind a URI template variable to a method parameter in a Spring MVC controller.

For example, if you have a URI `http://example.com/api/person/{id}`, you can use `@PathVariable` to extract the `id` value from the URI path and pass it as a parameter to your Spring MVC controller method.

Here's an example of how to use `@PathVariable` in a Spring MVC controller:

@RestController
@RequestMapping("/api/person")
public class PersonController {

    @GetMapping("/{id}")
    public Person getPersonById(@PathVariable Long id) {
        // code to retrieve and return person object with given id
    }
}

In this example, the `@PathVariable` annotation is used to extract the `id` value from the URI path and pass it as a parameter to the `getPersonById` method in the `PersonController` class.