public abstract class ReplacedBean {
protected static final Log log = LogFactory.getLog(ReplacedBean.class);
public void process() {
AnotherBean anotherBean = createAnotheBean();
anotherBean.doSth();
}
protected abstract AnotherBean createAnotheBean();
}
<bean id="AnotherBean" class="com.test.spring.di.mtddi.AnotherBean" scope="prototype"/>
<bean id="ReplacedBean" class="com.test.spring.di.mtddi.ReplacedBean" >
<lookup-method name="createAnotheBean" bean="AnotherBean"/>
</bean>
Bean A实现 ApplicationContextAware, Spring初始化的时候会将 ApplicationContext 传给Bean A,Bean A通过getBean("BeanB")方法每次得到Bean B.("BeanB"最好不要hardcode,通过property传入)例:
public class ContextAwareBean implements ApplicationContextAware {
protected static final Log log = LogFactory.getLog(AnotherBean.class);
private String anotherBeanName;
private ApplicationContext applicationContext;
public String getAnotherBeanName() {
return anotherBeanName;
}
public void setAnotherBeanName(String anotherBeanName) {
this.anotherBeanName = anotherBeanName;
}
public void process() {
log.info("process applicationContext " + applicationContext);
AnotherBean anotherBean = createAnotheBean();
anotherBean.doSth();
}
protected AnotherBean createAnotheBean() {
return this.applicationContext.getBean(anotherBeanName, AnotherBean.class);
}
public void setApplicationContext(ApplicationContext applicationContext){
log.info("setApplicationContext " + applicationContext);
this.applicationContext = applicationContext;
}
}
public class AnotherBean {
protected static final Log log = LogFactory.getLog(AnotherBean.class);
public String doSth(){
log.info("AnotherBean.doSth");
return "do something";
}
}
<bean id="AnotherBean" class="com.test.spring.di.mtddi.AnotherBean" scope="prototype"/>
<bean id="ContextAwareBean" class="com.test.spring.di.mtddi.ContextAwareBean" >
<property name="anotherBeanName" value="AnotherBean"/>
</bean>