https://ng-tech.icu/books/spring-notes/01.%E5%9F%BA%E7%A1%80%E4%BD%BF%E7%94%A8/3.%E4%BE%9D%E8%B5%96%E6%B3%A8%E5%85%A5/3.依赖注入Wowchemy (https://wowchemy.com)zhhttps://ng-tech.icu/media/sharing.pnghttps://ng-tech.icu/books/spring-notes/01.%E5%9F%BA%E7%A1%80%E4%BD%BF%E7%94%A8/3.%E4%BE%9D%E8%B5%96%E6%B3%A8%E5%85%A5/