Grails服务抽象类

本文介绍了Grails服务抽象类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我有一个抽象类，许多类扩展。一切都在 src / groovy 中。 在我的抽象类中，我希望有一个服务注入，类会继承，所以我不必在每一个注入它们。 抽象类动物{ def noiseService 抽象声音getSound（） } class Dog扩展动物{ Sound getSound （）{ noiseService.bark（）} } 在我的resources.groovy中： animal（com.thepound.Animal）{bean - > noiseService = ref（noiseService）} 说它不能实例化类，因为它是抽象的，所以我将它添加到定义中： bean.abstract = true 现在，我不再收到错误，但服务在我的子类中始终为空。我怎样才能使这个工作？解决方案这是我最终做的。 我跟着Burt Beckwith的帖子在这里 http：/ /burtbeckwith.com/blog/?p=1017 创建一个ApplicationContextHolder类。 然后 $ abstract b $ noise $ get $ b} 现在这个作品 class Dog extends Animal { Sound getSound（）{ noiseService.bark（）} 我没有必要在resources.groovy中放置任何狗或动物班 I have an abstract class that many classes extend. Everything is in src/groovy.In my abstract class I would like to have a service injected that the child classes would inherit so I don't have to inject them in every single one.abstract class Animal { def noiseService abstract Sound getSound()}class Dog extends Animal { Sound getSound() { noiseService.bark() }}In my resources.groovy:animal(com.thepound.Animal) { bean -> noiseService = ref("noiseService")}This produced an error saying it couldn't instantiate the class because it is abstract, so I added this to the definition: bean.abstract = trueNow I no longer get an error, however the services are always null in my child classes. How can I get this to work? 解决方案 Here is what I ended up doing. I followed Burt Beckwith's post here http://burtbeckwith.com/blog/?p=1017 to create an ApplicationContextHolder class.Thenabstract class Animal { def noiseService = ApplicationContextHolder.getBean("noiseService") abstract Sound getSound()}Now this worksclass Dog extends Animal { Sound getSound() { noiseService.bark() }}I didn't have to put anything in resources.groovy for the Dog or Animal classes 这篇关于Grails服务抽象类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！