實現ApplicationContextAware的執行個體會自動調用setApplicationContext()方法

1.編寫一個JavaBean實現ApplicationContextAware方法

Test.java

public class Test implements ApplicationContextAware {
private String name;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public void setApplicationContext(ApplicationContext context)
throws BeansException {
Test test = (Test) context.getBean("test");
System.out.println("內部列印 : " + test.getName());
}

}

如果實現了ApplicationContextAware介面，在Bean的執行個體化時會自動調用setApplicationContext()方法

2.把這個JavaBean加入Spring的管理

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="test" class="com.wj.spring.lesson3.applicationcontextaware.Test">
<property name="name" value="hello"></property>

</bean>
</beans>

3.測試這個JavaBean

TestBean.java

public class TestBean {

public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    Test hb = (HelloBean)context.getBean("test");
}

}

4.查看控制台列印的結果

內部列印 : hello

從資料結果可以看出setApplicationContext()方法確實在bean的初始化過程中被調用了

http://blog.sina.com.cn/s/blog_6fef491d0100ne87.html