Java SpringXML配置中的工厂方法bean继承
我读到,在基于XML的Spring配置中,bean可以继承工厂方法。Java SpringXML配置中的工厂方法bean继承,java,xml,spring,inheritance,javabeans,Java,Xml,Spring,Inheritance,Javabeans,我读到,在基于XML的Spring配置中,bean可以继承工厂方法。 我试图实现它: 控制器接口: public interface Controller { String method(); } ControllerFactory类: public class ControllerFactory { public Controller getController(String controllerName){ switch(controllerName){
我试图实现它:
控制器接口:
public interface Controller {
String method();
}
ControllerFactory类:
public class ControllerFactory {
public Controller getController(String controllerName){
switch(controllerName){
case "OtherController":
return new OtherController();
case "SampleController":
return new SampleController();
default:
throw new IllegalArgumentException("Wrong controller name.");
}
}
}
SampleController实现:
public class SampleController implements Controller {
@Override
public String method() {
return "SampleController";
}
}
public class OtherController implements Controller {
@Override
public String method() {
return "OtherController";
}
}
其他控制器实现:
public class SampleController implements Controller {
@Override
public String method() {
return "SampleController";
}
}
public class OtherController implements Controller {
@Override
public String method() {
return "OtherController";
}
}
但以下XML配置:
<!--factory method inheritance -->
<bean id="controllerFactory" class="factory.ControllerFactory"/>
<bean id="parentController" abstract="true" factory-bean="controllerFactory" factory-method="getController"/>
<bean id="otherController" parent="parentController">
<constructor-arg index="0" value="OtherController"/>
</bean>
如何更改它以正确实现工厂方法bean继承
将工厂方法配置复制到子bean的工作方式与预期一致:
<bean id="otherController" parent="parentController" factory-bean="controllerFactory" factory-method="getController">
<constructor-arg index="0" value="OtherController"/>
</bean>
将id为的bean更改为parentController,如下所示:
试试这个,它可能会工作。也传递构造函数参数。