@PathVariable
时间: 2023-07-17 15:13:28 浏览: 26
@PathVariable和@RequestParam都是Spring MVC中用于接收请求参数的注解。
@PathVariable用于获取URL中的参数,例如:
@GetMapping("/users/{id}")
public User getUserById(@PathVariable Long id) {
// ...
}
在上面的例子中,我们可以通过访问/users/123来获取id为123的用户信息。
@RequestParam用于获取请求参数,例如:
@GetMapping("/users")
public List<User> getUsersByAge(@RequestParam("age") int age) {
// ...
}
在上面的例子中,我们可以通过访问/users?age=18来获取年龄为18的用户列表。
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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