注解注入annotation

<!-- 要想用注解注入 ，必须加入这三条
xmlns:context="http://www.springframework.org/schema/context" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
-->

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"      xmlns:context="http://www.springframework.org/schema/context"
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         http://www.springframework.org/schema/context      http://www.springframework.org/schema/context/spring-context-2.5.xsd"> 
<bean id="person" class="com.example.vic.test_spring.di_annotation.Person">
</bean>
<bean id="student" class="com.example.vic.test_spring.di_annotation.Student">
</bean>
<!-- 会先遍历 bean中的类  寻找@resource  然后匹配其中的name  然后注入 -->
<context:annotation-config></context:annotation-config>
</beans>

public class Person {

public Person() {
System.out.println("new person");
}

@Resource(name="student")
private Student student;

@PostConstruct //在构造器之后
//然后注解注入就在这个init（）之后
public void init(){
System.out.println("init");
}
@PreDestroy    //在spring容器销毁之前
public void destroy(){
System.out.println("destroy");
}

public void sys(){
this.student.say();
}

}

public class Student {
public Student() {
System.out.println("new Student");
}

public void say() {
System.out.println("student");
}
}