使用Spring 3注释实现简单的工厂模式

没错，通过手动创建对象，您不会让Spring执行自动装配。还考虑在Spring之前管理您的服务：

@Componentpublic class MyServiceFactory {    @Autowired    private MyServiceOne myServiceOne;    @Autowired    private MyServiceTwo myServiceTwo;    @Autowired    private MyServiceThree myServiceThree;    @Autowired    private MyServiceDefault myServiceDefault;    public static MyService getMyService(String service) {        service = service.toLowerCase();        if (service.equals("one")) { return myServiceOne;        } else if (service.equals("two")) { return myServiceTwo;        } else if (service.equals("three")) { return myServiceThree;        } else { return myServiceDefault;        }    }}

但我认为总体设计会很差。那岂不是更好有一个一般的

MyService

one

two

three

checkStatus()

@Componentpublic class MyServiceAdapter implements MyService {    @Autowired    private MyServiceOne myServiceOne;    @Autowired    private MyServiceTwo myServiceTwo;    @Autowired    private MyServiceThree myServiceThree;    @Autowired    private MyServiceDefault myServiceDefault;    public boolean checkStatus(String service) {        service = service.toLowerCase();        if (service.equals("one")) { return myServiceOne.checkStatus();        } else if (service.equals("two")) { return myServiceTwo.checkStatus();        } else if (service.equals("three")) { return myServiceThree.checkStatus();        } else { return myServiceDefault.checkStatus();        }    }}

这 仍然
设计不佳，因为添加新的

MyService

MyServiceAdapter