@PathVariable
时间: 2023-10-03 18:03:20 浏览: 40
@PathVariable 是 Spring MVC 中的注解,用于将 URL 中的变量值绑定到方法参数上。它可以让我们方便地获取 URL 中的参数值,而不需要手动解析 URL。
例如,假设我们有一个 GET 请求 /users/{id},其中 {id} 表示用户的 ID。我们可以使用 @PathVariable 将 {id} 绑定到方法参数上,如下所示:
```
@GetMapping("/users/{id}")
public User getUser(@PathVariable Long id) {
...
}
```
这样,当请求 /users/123 时,Spring MVC 会自动将 123 绑定到 id 参数上,我们就可以在方法中使用该参数了。
相关问题
@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.
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