如何从其他bean属性值设置bean属性值

Question

For example we have bean beanA with string property propertyA :

<bean name="beanA" class="...">
     <property name="propertyA"><value>some string value </value></property>
</bean>

And second bean beanB has also string property propertyB, and I want initialize this property with same value as beanA.propertyA, I thought I need to do something like this:

<bean name="beanB" class="...">
     <property name="propertyB"><value>beanA.propertyA</value></property>
</bean>

But this is not works, expression beanA.propertyA threated as string value.

Probably this is go against IoC theory and not supported by Spring.

Thanks.

Answer 1

The util namespace has some pretty useful things.

You can use <util:property-path id="name" path="testBean.age"/>

Answer 2

In Spring 3 you can also use Spring Expression language :

<bean name="beanB" class="...">
     <property name="propertyB"><value>#{ beanA.propertyA }</value></property>
</bean>