Spring(二)

项目名：Spring01-Constractor
讲解内容：
    构造器注入法

导入jar包
commons-logging.jar
spring.jar

配置applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> 
        <!-- bean definitions here -->
        <bean id="cls" class="com.fyl.entitiy.Classes"/>
        <bean id="stu" class="com.fyl.entitiy.Student">
            <constructor-arg type="java.lang.Integer" value="1001"/>
            <constructor-arg type="java.lang.String" value="小白"/>
            <constructor-arg ref="cls"/>
        </bean>
</beans>

调用方法

//1.初始化Spring容器
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        //2.提取bean,根据容器中的id来获取的
        Student stu=(Student)ctx.getBean("stu");
        //3.调方法
        stu.method();