当为遗留系统加入spring时,经典问题就是遗留系统需要引用spring管理的bean。幸好spring有机制可以处理这些。
建一个类实现ApplicationContextAware接口,有一个引用ApplicationContext的静态成员,然后,遗留系统需要引用spring管理的bean的地方,使用这个类。
1.比如:我这里建一个SpringContext类
package
net.blogjava.chenlb;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
/**
* 此类可以取得Spring的上下文.
* Spring 使new方法创建的对象可以引用spring管理的bean.
* 2007-10-18 上午11:12:33
* @author chenlb
*/
public class SpringContext implements ApplicationContextAware {
protected static ApplicationContext context;
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
context = applicationContext;
}
public static ApplicationContext getContext() {
return context;
}
}
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
/**
* 此类可以取得Spring的上下文.
* Spring 使new方法创建的对象可以引用spring管理的bean.
* 2007-10-18 上午11:12:33
* @author chenlb
*/
public class SpringContext implements ApplicationContextAware {
protected static ApplicationContext context;
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
context = applicationContext;
}
public static ApplicationContext getContext() {
return context;
}
}
2.然后在spring配置文件里加
<
bean
id
="springContext"
class
="net.blogjava.chenlb.SpringContext"
></
bean
>
3.其它类中引用
MyBean myBean
=
(MyBean) SpringContext.getContext().getBean(
"
myBean
"
);
4.如果老是写SpringContext.getContext().getBean("...");麻烦,可以建一个工厂类来返回你要的bean
package
net.blogjava.chenlb;
public class MyServerFactory {
public static MyBean1 getMyBean1() {
return (MyBean1) SpringContext.getContext().getBean( " myBean1 " );
}
}
public class MyServerFactory {
public static MyBean1 getMyBean1() {
return (MyBean1) SpringContext.getContext().getBean( " myBean1 " );
}
}