PathVariable class

Binds a path variable from the URI template to a method parameter.

Path variables are placeholders in URL patterns that are extracted from the actual request URI. They are commonly used in RESTful APIs to identify specific resources.

Parameters

• value: Name of the path variable (defaults to parameter name)
• required: Whether the path variable is mandatory (default: true)
• defaultValue: Fallback value (rarely used for path variables)

Example

@RestController()
class UserController {
  @GetMapping('/users/{userId}/orders/{orderId}')
  Order getOrder(
    @PathVariable('userId') String userId,
    @PathVariable() String orderId  // Uses parameter name 'orderId'
  ) {
    // URL: /users/123/orders/456
    // userId = "123", orderId = "456"
    return orderService.findUserOrder(userId, orderId);
  }
}

Framework Integration

Processed by PathVariableResolver which extracts values from URI template variables.