[增添]添加了datasource的setting数据库以及默认值

vendor/symfony/routing/README.md

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+Routing Component
+=================
+
+The Routing component maps an HTTP request to a set of configuration variables.
+
+Getting Started
+---------------
+
+```
+$ composer require symfony/routing
+```
+
+```php
+use App\Controller\BlogController;
+use Symfony\Component\Routing\Generator\UrlGenerator;
+use Symfony\Component\Routing\Matcher\UrlMatcher;
+use Symfony\Component\Routing\RequestContext;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCollection;
+
+$route = new Route('/blog/{slug}', ['_controller' => BlogController::class]);
+$routes = new RouteCollection();
+$routes->add('blog_show', $route);
+
+$context = new RequestContext();
+
+// Routing can match routes with incoming requests
+$matcher = new UrlMatcher($routes, $context);
+$parameters = $matcher->match('/blog/lorem-ipsum');
+// $parameters = [
+//     '_controller' => 'App\Controller\BlogController',
+//     'slug' => 'lorem-ipsum',
+//     '_route' => 'blog_show'
+// ]
+
+// Routing can also generate URLs for a given route
+$generator = new UrlGenerator($routes, $context);
+$url = $generator->generate('blog_show', [
+    'slug' => 'my-blog-post',
+]);
+// $url = '/blog/my-blog-post'
+```
+
+Sponsor
+-------
+
+The Routing component for Symfony 6.4 is [backed][1] by [redirection.io][2].
+
+redirection.io logs all your website’s HTTP traffic, and lets you fix errors
+with redirect rules in seconds. Give your marketing, SEO and IT teams the
+right tool to manage your website traffic efficiently!
+
+Help Symfony by [sponsoring][3] its development!
+
+Resources
+---------
+
+ * [Documentation](https://symfony.com/doc/current/routing.html)
+ * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+ * [Report issues](https://github.com/symfony/symfony/issues) and
+   [send Pull Requests](https://github.com/symfony/symfony/pulls)
+   in the [main Symfony repository](https://github.com/symfony/symfony)
+
+[1]: https://symfony.com/backers
+[2]: https://redirection.io
+[3]: https://symfony.com/sponsor