Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2023-06-07 09:32:39.680 ERROR 12220 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'guanggaoController' method com.youzi.controller.GuanggaoController#toGuanggaoManagerHtml(Guanggao, Model) to {GET /toGuanggao}: There is already 'commonsController' bean method com.youzi.controller.CommonsController#toGuanggaoManagerHtml() mapped.

这个错误是由于在Spring框架中存在多个映射到同一URL的方法，导致框架无法确定要调用哪个方法。具体地说，错误信息中提到了两个方法：`com.youzi.controller.GuanggaoController#toGuanggaoManagerHtml(Guanggao, Model)` 和 `com.youzi.controller.CommonsController#toGuanggaoManagerHtml()`。你需要检查这两个方法的映射路径是否存在重复，如果有，则需要修改其中一个方法的映射路径，以确保路径唯一。另外，你也可以使用`@RequestMapping`注解的`value`属性来明确指定方法的URL映射路径，以避免这种错误的出现。