说我有一个界面
interface IPerson {...}
我有此接口(interface)的两种实现
@Component
class Programmer implements IPerson {...}
@Component
class LionTamer implements IPerson {...}
说我有一个使用Autowire注入(inject)的类(class)
@Component
class SomethingThatDoesStuff {
@Autowired
public SomethingThatDoesStuff (IPerson someone) {
...
}
}
Spring如何知道要注入(inject)的实现?有没有办法告诉spring要注入(inject)什么实现?可以通过注释完成此操作,还是必须定义某种工厂?如果可以,怎么办?
最佳答案
如@passion所述,您应该使用bean命名(standard Spring IoC feature):
@Component("programmer")
class Programmer implements IPerson {...}
@Component("lionTamer")
class LionTamer implements IPerson {...}
@Component
class SomethingThatDoesStuff {
@Autowired
public SomethingThatDoesStuff (@Qualifier("programmer") IPerson someone) {
...
}
}