自动装配工厂创建的实例的 Spring 方法是什么？
我有一个控制器，它应该创建版本相关的实例（当前未实现）。
@Controller
public class ReportController {
@Autowired
private ReportCompFactory reportCompFactory;
public ModelAndView getReport() {
I_Report report = reportCompFactory.getObject();
^^^^^<- no autowiring in this instance
}
...
}
工厂看起来像这样：
@Component
public class ReportCompFactory implements FactoryBean<I_Report> {
@Override
public I_Report getObject() throws BeansException {
return new ReportComp();
}
@Override
public Class<?> getObjectType() {
return I_Report.class;
}
@Override
public boolean isSingleton() {
return false;
}
}
创建的实例字段（@Autowired 注释）未设置。 我该怎么办，FactoryBean 是要实现的正确接口吗？
我更喜欢一个不涉及 xml 配置的解决方案。
组件本身：
ReportComp implements I_Report {
@Autowired
private ReportDao reportDao;
^^^^^^^<- not set after creation
...
}
}
I have a controller which is supposed to create version dependend instances (currently not implemented).
@Controller
public class ReportController {
@Autowired
private ReportCompFactory reportCompFactory;
public ModelAndView getReport() {
I_Report report = reportCompFactory.getObject();
^^^^^<- no autowiring in this instance
}
...
}
The Factory looks like this:
@Component
public class ReportCompFactory implements FactoryBean<I_Report> {
@Override
public I_Report getObject() throws BeansException {
return new ReportComp();
}
@Override
public Class<?> getObjectType() {
return I_Report.class;
}
@Override
public boolean isSingleton() {
return false;
}
}
The created instances fields (@Autowired annotated ) are not set.
What should I do, is FactoryBean the right interface to implement?
I would prefer a solution which doesn't involve xml-configurations.
The component itself:
ReportComp implements I_Report {
@Autowired
private ReportDao reportDao;
^^^^^^^<- not set after creation
...
}
}
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如果您创建对象，Spring 不会执行自动装配。这里有几个选项
prototype范围 - 这将使工厂变得多余（这适用于您只想在工厂中实例化的情况）ReportDao在工厂中，并通过 setter 将其设置为ReportCompApplicationContext并执行ctx.getAutowireCapableBeanFactory().autowireBean(实例)Spring doesn't perform autowiring if you create your objects. Here are a few options
prototype- this will make the factory redundant (this is applicable in case you simply want instantiation in the factory)ReportDaoin the factory, and set it to theReportCompvia a setterApplicationContextin the factory and doctx.getAutowireCapableBeanFactory().autowireBean(instance)